Merge branch 'master' of https://github.com/Maiklins/tutorials into BAEL-20858-move-spring-boot-camel

 Conflicts:

	spring-boot-modules/pom.xml

spring-boot-modules/pom.xml

@@ -15,7 +15,10 @@
 
     <modules>
         <module>spring-boot-camel</module>
+        <module>spring-boot-data</module>
         <module>spring-boot-mvc-birt</module>
+        <module>spring-boot-properties</module>
+        <module>spring-boot-testing</module>
         <module>spring-boot-vue</module>
     </modules>
 

spring-boot-modules/spring-boot-data/README.md

@@ -0,0 +1,11 @@
+## Spring Boot Data
+
+This module contains articles about Spring Boot with Spring Data
+
+## Relevant Articles:
+
+- [Formatting JSON Dates in Spring Boot](https://www.baeldung.com/spring-boot-formatting-json-dates)
+- [Rendering Exceptions in JSON with Spring](https://www.baeldung.com/spring-exceptions-json)
+- [Disable Spring Data Auto Configuration](https://www.baeldung.com/spring-data-disable-auto-config)
+- [Repositories with Multiple Spring Data Modules](https://www.baeldung.com/spring-multiple-data-modules)
+- [Spring Custom Property Editor](https://www.baeldung.com/spring-mvc-custom-property-editor)

spring-boot-modules/spring-boot-data/pom.xml

@@ -0,0 +1,175 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <artifactId>spring-boot-data</artifactId>
+    <name>spring-boot-data</name>
+    <packaging>war</packaging>
+    <description>Spring Boot Data Module</description>
+
+    <parent>
+        <groupId>com.baeldung</groupId>
+        <artifactId>parent-boot-2</artifactId>
+        <version>0.0.1-SNAPSHOT</version>
+        <relativePath>../../parent-boot-2</relativePath>
+    </parent>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-data-redis</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.javers</groupId>
+            <artifactId>javers-spring-boot-starter-sql</artifactId>
+            <version>${javers.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-data-mongodb</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-data-jpa</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>com.h2database</groupId>
+            <artifactId>h2</artifactId>
+            <version>${h2.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-web</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-tomcat</artifactId>
+            <scope>provided</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-test</artifactId>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <finalName>spring-boot-data</finalName>
+        <resources>
+            <resource>
+                <directory>src/main/resources</directory>
+                <filtering>true</filtering>
+            </resource>
+        </resources>
+
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-war-plugin</artifactId>
+            </plugin>
+            <plugin>
+                <groupId>pl.project13.maven</groupId>
+                <artifactId>git-commit-id-plugin</artifactId>
+                <version>${git-commit-id-plugin.version}</version>
+                <executions>
+                    <execution>
+                        <id>get-the-git-infos</id>
+                        <goals>
+                            <goal>revision</goal>
+                        </goals>
+                        <phase>initialize</phase>
+                    </execution>
+                    <execution>
+                        <id>validate-the-git-infos</id>
+                        <goals>
+                            <goal>validateRevision</goal>
+                        </goals>
+                        <phase>package</phase>
+                    </execution>
+                </executions>
+                <configuration>
+                    <generateGitPropertiesFile>true</generateGitPropertiesFile>
+                    <generateGitPropertiesFilename>${project.build.outputDirectory}/git.properties
+                    </generateGitPropertiesFilename>
+                </configuration>
+            </plugin>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <configuration>
+                    <source>${source.version}</source>
+                    <target>${target.version}</target>
+                </configuration>
+            </plugin>
+        </plugins>
+    </build>
+
+    <profiles>
+        <profile>
+            <id>autoconfiguration</id>
+            <build>
+                <plugins>
+                    <plugin>
+                        <groupId>org.springframework.boot</groupId>
+                        <artifactId>spring-boot-maven-plugin</artifactId>
+                        <configuration>
+                            <mainClass>com.baeldung.javers.SpringBootJaVersApplication</mainClass>
+                            <layout>JAR</layout>
+                        </configuration>
+                    </plugin>
+                    <plugin>
+                        <groupId>org.apache.maven.plugins</groupId>
+                        <artifactId>maven-compiler-plugin</artifactId>
+                        <configuration>
+                            <source>${source.version}</source>
+                            <target>${target.version}</target>
+                        </configuration>
+                    </plugin>
+                    <plugin>
+                        <groupId>org.apache.maven.plugins</groupId>
+                        <artifactId>maven-surefire-plugin</artifactId>
+                        <executions>
+                            <execution>
+                                <phase>integration-test</phase>
+                                <goals>
+                                    <goal>test</goal>
+                                </goals>
+                                <configuration>
+                                    <excludes>
+                                        <exclude>**/*LiveTest.java</exclude>
+                                        <exclude>**/*IntegrationTest.java</exclude>
+                                        <exclude>**/*IntTest.java</exclude>
+                                    </excludes>
+                                    <includes>
+                                        <include>**/AutoconfigurationTest.java</include>
+                                    </includes>
+                                </configuration>
+                            </execution>
+                        </executions>
+                        <configuration>
+                            <systemPropertyVariables>
+                                <test.mime>json</test.mime>
+                            </systemPropertyVariables>
+                        </configuration>
+                    </plugin>
+                    <plugin>
+                        <groupId>org.apache.maven.plugins</groupId>
+                        <artifactId>maven-compiler-plugin</artifactId>
+                        <configuration>
+                            <source>${source.version}</source>
+                            <target>${target.version}</target>
+                        </configuration>
+                    </plugin>
+                </plugins>
+            </build>
+        </profile>
+    </profiles>
+
+    <properties>
+        <javers.version>5.6.3</javers.version>
+        <git-commit-id-plugin.version>2.2.4</git-commit-id-plugin.version>
+        <source.version>1.8</source.version>
+        <target.version>1.8</target.version>
+    </properties>
+    
+</project>

spring-boot-modules/spring-boot-data/src/main/java/com/baeldung/SpringBootDataApplication.java

@@ -0,0 +1,13 @@
+package com.baeldung;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class SpringBootDataApplication {
+
+    public static void main(String[] args) {
+        SpringApplication.run(SpringBootDataApplication.class, args);
+    }
+
+}

spring-boot-modules/spring-boot-data/src/main/java/com/baeldung/disableautoconfig/SpringDataJPA.java

@@ -0,0 +1,19 @@
+package com.baeldung.disableautoconfig;
+
+import org.javers.spring.boot.sql.JaversSqlAutoConfiguration;
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.boot.autoconfigure.data.web.SpringDataWebAutoConfiguration;
+import org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration;
+import org.springframework.boot.autoconfigure.jdbc.DataSourceTransactionManagerAutoConfiguration;
+import org.springframework.boot.autoconfigure.orm.jpa.HibernateJpaAutoConfiguration;
+
+@SpringBootApplication(exclude = {DataSourceAutoConfiguration.class,
+        JaversSqlAutoConfiguration.class, SpringDataWebAutoConfiguration.class,
+        DataSourceTransactionManagerAutoConfiguration.class, HibernateJpaAutoConfiguration.class})
+public class SpringDataJPA {
+
+    public static void main(String[] args) {
+        SpringApplication.run(SpringDataJPA.class, args);
+    }
+}

spring-boot-modules/spring-boot-data/src/main/java/com/baeldung/disableautoconfig/SpringDataMongoDB.java

@@ -0,0 +1,16 @@
+package com.baeldung.disableautoconfig;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.boot.autoconfigure.data.mongo.MongoDataAutoConfiguration;
+import org.springframework.boot.autoconfigure.data.web.SpringDataWebAutoConfiguration;
+import org.springframework.boot.autoconfigure.mongo.MongoAutoConfiguration;
+
+@SpringBootApplication(exclude = {MongoAutoConfiguration.class, MongoDataAutoConfiguration.class,
+        SpringDataWebAutoConfiguration.class})
+public class SpringDataMongoDB {
+
+    public static void main(String[] args) {
+        SpringApplication.run(SpringDataMongoDB.class, args);
+    }
+}

spring-boot-modules/spring-boot-data/src/main/java/com/baeldung/disableautoconfig/SpringDataRedis.java

@@ -0,0 +1,16 @@
+package com.baeldung.disableautoconfig;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.boot.autoconfigure.data.redis.RedisAutoConfiguration;
+import org.springframework.boot.autoconfigure.data.redis.RedisRepositoriesAutoConfiguration;
+import org.springframework.boot.autoconfigure.data.web.SpringDataWebAutoConfiguration;
+
+@SpringBootApplication(exclude = {RedisAutoConfiguration.class, RedisRepositoriesAutoConfiguration.class,
+        SpringDataWebAutoConfiguration.class})
+public class SpringDataRedis {
+
+    public static void main(String[] args) {
+        SpringApplication.run(SpringDataRedis.class, args);
+    }
+}

spring-boot-modules/spring-boot-data/src/main/java/com/baeldung/javers/README.md

@@ -0,0 +1,3 @@
+### Relevant Articles
+
+- [Using JaVers for Data Model Auditing in Spring Data](https://www.baeldung.com/spring-data-javers-audit)

spring-boot-modules/spring-boot-data/src/main/java/com/baeldung/javers/SpringBootJaVersApplication.java

@@ -0,0 +1,31 @@
+package com.baeldung.javers;
+
+import com.baeldung.javers.domain.Address;
+import com.baeldung.javers.domain.Product;
+import com.baeldung.javers.domain.Store;
+import com.baeldung.javers.repo.StoreRepository;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.boot.context.event.ApplicationReadyEvent;
+import org.springframework.context.event.EventListener;
+
+@SpringBootApplication
+public class SpringBootJaVersApplication {
+    @Autowired
+    StoreRepository storeRepository;
+
+    public static void main(String[] args) {
+        SpringApplication.run(SpringBootJaVersApplication.class, args);
+    }
+
+    @EventListener
+    public void appReady(ApplicationReadyEvent event) {
+        Store store = new Store("Baeldung store", new Address("Some street", 22222));
+        for (int i = 1; i < 3; i++) {
+            Product product = new Product("Product #" + i, 100 * i);
+            store.addProduct(product);
+        }
+        storeRepository.save(store);
+    }
+}

spring-boot-modules/spring-boot-data/src/main/java/com/baeldung/javers/config/JaversConfiguration.java

@@ -0,0 +1,20 @@
+package com.baeldung.javers.config;
+
+import org.javers.spring.auditable.AuthorProvider;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+
+@Configuration
+public class JaversConfiguration {
+    @Bean
+    public AuthorProvider provideJaversAuthor() {
+        return new SimpleAuthorProvider();
+    }
+
+    private static class SimpleAuthorProvider implements AuthorProvider {
+        @Override
+        public String provide() {
+            return "Baeldung Author";
+        }
+    }
+}

spring-boot-modules/spring-boot-data/src/main/java/com/baeldung/javers/domain/Address.java

@@ -0,0 +1,33 @@
+package com.baeldung.javers.domain;
+
+import javax.persistence.Embeddable;
+
+@Embeddable
+public class Address {
+    private String address;
+    private Integer zipCode;
+
+    public Address(String address, Integer zipCode) {
+        this.address = address;
+        this.zipCode = zipCode;
+    }
+
+    public Address() {
+    }
+
+    public String getAddress() {
+        return address;
+    }
+
+    public void setAddress(String address) {
+        this.address = address;
+    }
+
+    public Integer getZipCode() {
+        return zipCode;
+    }
+
+    public void setZipCode(Integer zipCode) {
+        this.zipCode = zipCode;
+    }
+}

spring-boot-modules/spring-boot-data/src/main/java/com/baeldung/javers/domain/Product.java

@@ -0,0 +1,61 @@
+package com.baeldung.javers.domain;
+
+import javax.persistence.*;
+
+@Entity
+public class Product {
+    @Id
+    @GeneratedValue
+    private int id;
+
+    private String name;
+    private double price;
+
+    @ManyToOne(fetch = FetchType.LAZY)
+    @JoinColumn(name = "store_id")
+    private Store store;
+
+    public Product(String name, double price) {
+        this.name = name;
+        this.price = price;
+    }
+
+    public Product() {
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public double getPrice() {
+        return price;
+    }
+
+    public void setPrice(double price) {
+        this.price = price;
+    }
+
+    public int getId() {
+        return id;
+    }
+
+    public void setId(int id) {
+        this.id = id;
+    }
+
+    public Store getStore() {
+        return store;
+    }
+
+    public void setStore(Store store) {
+        this.store = store;
+    }
+
+    public void setNamePrefix(String prefix) {
+        this.name = prefix + this.name;
+    }
+}

spring-boot-modules/spring-boot-data/src/main/java/com/baeldung/javers/domain/Store.java

@@ -0,0 +1,62 @@
+package com.baeldung.javers.domain;
+
+import javax.persistence.*;
+import java.util.ArrayList;
+import java.util.List;
+
+@Entity
+public class Store {
+    @Id
+    @GeneratedValue
+    private int id;
+    private String name;
+    @Embedded
+    private Address address;
+    @OneToMany(
+            mappedBy = "store",
+            cascade = CascadeType.ALL,
+            orphanRemoval = true
+    )
+    private List<Product> products = new ArrayList<>();
+
+    public Store(String name, Address address) {
+        this.name = name;
+        this.address = address;
+    }
+
+    public Store() {
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public Address getAddress() {
+        return address;
+    }
+
+    public void setAddress(Address address) {
+        this.address = address;
+    }
+
+    public int getId() {
+        return id;
+    }
+
+    public void setId(int id) {
+        this.id = id;
+    }
+
+    public void addProduct(Product product) {
+        product.setStore(this);
+        this.products.add(product);
+    }
+
+    public List<Product> getProducts() {
+        return this.products;
+    }
+}

spring-boot-modules/spring-boot-data/src/main/java/com/baeldung/javers/repo/ProductRepository.java

@@ -0,0 +1,11 @@
+package com.baeldung.javers.repo;
+
+import com.baeldung.javers.domain.Product;
+import org.javers.spring.annotation.JaversAuditable;
+import org.springframework.data.repository.CrudRepository;
+
+public interface ProductRepository extends CrudRepository<Product, Integer> {
+    @Override
+    @JaversAuditable
+    <S extends Product> S save(S s);
+}

spring-boot-modules/spring-boot-data/src/main/java/com/baeldung/javers/repo/StoreRepository.java

@@ -0,0 +1,9 @@
+package com.baeldung.javers.repo;
+
+import com.baeldung.javers.domain.Store;
+import org.javers.spring.annotation.JaversSpringDataAuditable;
+import org.springframework.data.repository.CrudRepository;
+
+@JaversSpringDataAuditable
+public interface StoreRepository extends CrudRepository<Store, Integer> {
+}

spring-boot-modules/spring-boot-data/src/main/java/com/baeldung/javers/service/StoreService.java

@@ -0,0 +1,59 @@
+package com.baeldung.javers.service;
+
+
+import com.baeldung.javers.domain.Product;
+import com.baeldung.javers.domain.Store;
+import com.baeldung.javers.repo.ProductRepository;
+import com.baeldung.javers.repo.StoreRepository;
+import org.springframework.stereotype.Service;
+
+import java.util.Optional;
+import java.util.Random;
+
+@Service
+public class StoreService {
+    private final ProductRepository productRepository;
+    private final StoreRepository storeRepository;
+
+    public StoreService(ProductRepository productRepository, StoreRepository storeRepository) {
+        this.productRepository = productRepository;
+        this.storeRepository = storeRepository;
+    }
+
+    public void updateProductPrice(Integer productId, Double price) {
+        Optional<Product> productOpt = productRepository.findById(productId);
+        productOpt.ifPresent(product -> {
+            product.setPrice(price);
+            productRepository.save(product);
+        });
+    }
+
+    public void rebrandStore(int storeId, String updatedName) {
+        Optional<Store> storeOpt = storeRepository.findById(storeId);
+        storeOpt.ifPresent(store -> {
+            store.setName(updatedName);
+            store.getProducts().forEach(product -> {
+                product.setNamePrefix(updatedName);
+            });
+            storeRepository.save(store);
+        });
+    }
+
+    public void createRandomProduct(Integer storeId) {
+        Optional<Store> storeOpt = this.storeRepository.findById(storeId);
+        storeOpt.ifPresent(store -> {
+            Random random = new Random();
+            Product product = new Product("Product#" + random.nextInt(), random.nextDouble() * 100);
+            store.addProduct(product);
+            storeRepository.save(store);
+        });
+    }
+
+    public Store findStoreById(int storeId) {
+        return storeRepository.findById(storeId).get();
+    }
+
+    public Product findProductById(int id) {
+        return this.productRepository.findById(id).get();
+    }
+}

spring-boot-modules/spring-boot-data/src/main/java/com/baeldung/javers/web/RebrandStoreDto.java

@@ -0,0 +1,5 @@
+package com.baeldung.javers.web;
+
+public class RebrandStoreDto {
+    public String name;
+}

spring-boot-modules/spring-boot-data/src/main/java/com/baeldung/javers/web/StoreController.java

@@ -0,0 +1,73 @@
+package com.baeldung.javers.web;
+
+import com.baeldung.javers.domain.Product;
+import com.baeldung.javers.domain.Store;
+import com.baeldung.javers.service.StoreService;
+import org.javers.core.Changes;
+import org.javers.core.Javers;
+import org.javers.core.metamodel.object.CdoSnapshot;
+import org.javers.repository.jql.JqlQuery;
+import org.javers.repository.jql.QueryBuilder;
+import org.javers.shadow.Shadow;
+import org.springframework.http.MediaType;
+import org.springframework.web.bind.annotation.*;
+
+import java.util.List;
+
+@RestController
+public class StoreController {
+    private final StoreService storeService;
+    private final Javers javers;
+
+    public StoreController(StoreService customerService, Javers javers) {
+        this.storeService = customerService;
+        this.javers = javers;
+    }
+
+    @PostMapping("/stores/{storeId}/products/random")
+    public void createRandomProduct(@PathVariable final Integer storeId) {
+        storeService.createRandomProduct(storeId);
+    }
+
+    @PostMapping("/stores/{storeId}/rebrand")
+    public void rebrandStore(@PathVariable final Integer storeId, @RequestBody RebrandStoreDto rebrandStoreDto) {
+        storeService.rebrandStore(storeId, rebrandStoreDto.name);
+    }
+
+    @PostMapping(value = "/stores/{storeId}/products/{productId}/price", consumes = MediaType.APPLICATION_JSON_VALUE)
+    public void updateProductPrice(@PathVariable final Integer productId, @PathVariable String storeId, @RequestBody UpdatePriceDto priceDto) {
+        storeService.updateProductPrice(productId, priceDto.price);
+    }
+
+    @GetMapping("/products/{productId}/changes")
+    public String getProductChanges(@PathVariable int productId) {
+        Product product = storeService.findProductById(productId);
+        QueryBuilder jqlQuery = QueryBuilder.byInstance(product);
+        Changes changes = javers.findChanges(jqlQuery.build());
+        return javers.getJsonConverter().toJson(changes);
+    }
+
+    @GetMapping("/products/snapshots")
+    public String getProductSnapshots() {
+        QueryBuilder jqlQuery = QueryBuilder.byClass(Product.class);
+        List<CdoSnapshot> snapshots = javers.findSnapshots(jqlQuery.build());
+        return javers.getJsonConverter().toJson(snapshots);
+    }
+
+    @GetMapping("/stores/{storeId}/shadows")
+    public String getStoreShadows(@PathVariable int storeId) {
+        Store store = storeService.findStoreById(storeId);
+        JqlQuery jqlQuery = QueryBuilder.byInstance(store)
+                .withChildValueObjects().build();
+        List<Shadow<Store>> shadows = javers.findShadows(jqlQuery);
+        return javers.getJsonConverter().toJson(shadows.get(0));
+    }
+
+    @GetMapping("/stores/snapshots")
+    public String getStoresSnapshots() {
+        QueryBuilder jqlQuery = QueryBuilder.byClass(Store.class);
+        List<CdoSnapshot> snapshots = javers.findSnapshots(jqlQuery.build());
+        return javers.getJsonConverter().toJson(snapshots);
+    }
+
+}

spring-boot-modules/spring-boot-data/src/main/java/com/baeldung/javers/web/UpdatePriceDto.java

@@ -0,0 +1,5 @@
+package com.baeldung.javers.web;
+
+public class UpdatePriceDto {
+    public double price;
+}

spring-boot-modules/spring-boot-data/src/main/java/com/baeldung/jsondateformat/Contact.java

@@ -0,0 +1,70 @@
+package com.baeldung.jsondateformat;
+
+import com.fasterxml.jackson.annotation.JsonFormat;
+
+import java.time.LocalDate;
+import java.time.LocalDateTime;
+
+public class Contact {
+
+    private String name;
+    private String address;
+    private String phone;
+
+    @JsonFormat(pattern="yyyy-MM-dd")
+    private LocalDate birthday;
+
+    @JsonFormat(pattern="yyyy-MM-dd HH:mm:ss")
+    private LocalDateTime lastUpdate;
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public String getAddress() {
+        return address;
+    }
+
+    public void setAddress(String address) {
+        this.address = address;
+    }
+
+    public String getPhone() {
+        return phone;
+    }
+
+    public void setPhone(String phone) {
+        this.phone = phone;
+    }
+
+    public LocalDate getBirthday() {
+        return birthday;
+    }
+
+    public void setBirthday(LocalDate birthday) {
+        this.birthday = birthday;
+    }
+
+    public LocalDateTime getLastUpdate() {
+        return lastUpdate;
+    }
+
+    public void setLastUpdate(LocalDateTime lastUpdate) {
+        this.lastUpdate = lastUpdate;
+    }
+
+    public Contact() {
+    }
+
+    public Contact(String name, String address, String phone, LocalDate birthday, LocalDateTime lastUpdate) {
+        this.name = name;
+        this.address = address;
+        this.phone = phone;
+        this.birthday = birthday;
+        this.lastUpdate = lastUpdate;
+    }
+}

spring-boot-modules/spring-boot-data/src/main/java/com/baeldung/jsondateformat/ContactApp.java

@@ -0,0 +1,13 @@
+package com.baeldung.jsondateformat;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class ContactApp {
+
+    public static void main(String[] args) {
+        SpringApplication.run(ContactApp.class, args);
+    }
+
+}

spring-boot-modules/spring-boot-data/src/main/java/com/baeldung/jsondateformat/ContactAppConfig.java

@@ -0,0 +1,33 @@
+package com.baeldung.jsondateformat;
+
+import com.fasterxml.jackson.datatype.jsr310.ser.LocalDateSerializer;
+import com.fasterxml.jackson.datatype.jsr310.ser.LocalDateTimeSerializer;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
+import org.springframework.boot.autoconfigure.jackson.Jackson2ObjectMapperBuilderCustomizer;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.http.converter.json.Jackson2ObjectMapperBuilder;
+
+import java.time.format.DateTimeFormatter;
+
+@Configuration
+public class ContactAppConfig {
+
+    private static final String dateFormat = "yyyy-MM-dd";
+
+    private static final String dateTimeFormat = "yyyy-MM-dd HH:mm:ss";
+
+    @Bean
+    @ConditionalOnProperty(value = "spring.jackson.date-format", matchIfMissing = true, havingValue = "none")
+    public Jackson2ObjectMapperBuilderCustomizer jsonCustomizer() {
+        return new Jackson2ObjectMapperBuilderCustomizer() {
+            @Override
+            public void customize(Jackson2ObjectMapperBuilder builder) {
+                builder.simpleDateFormat(dateTimeFormat);
+                builder.serializers(new LocalDateSerializer(DateTimeFormatter.ofPattern(dateFormat)));
+                builder.serializers(new LocalDateTimeSerializer(DateTimeFormatter.ofPattern(dateTimeFormat)));
+            }
+        };
+    }
+
+}

spring-boot-modules/spring-boot-data/src/main/java/com/baeldung/jsondateformat/ContactController.java

@@ -0,0 +1,77 @@
+package com.baeldung.jsondateformat;
+
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+import java.time.LocalDate;
+import java.time.LocalDateTime;
+import java.util.ArrayList;
+import java.util.Date;
+import java.util.List;
+
+@RestController
+@RequestMapping(value = "/contacts")
+public class ContactController {
+
+    @GetMapping
+    public List<Contact> getContacts() {
+        List<Contact> contacts = new ArrayList<>();
+
+        Contact contact1 = new Contact("John Doe", "123 Sesame Street", "123-456-789", LocalDate.now(), LocalDateTime.now());
+        Contact contact2 = new Contact("John Doe 2", "124 Sesame Street", "123-456-789", LocalDate.now(), LocalDateTime.now());
+        Contact contact3 = new Contact("John Doe 3", "125 Sesame Street", "123-456-789", LocalDate.now(), LocalDateTime.now());
+
+        contacts.add(contact1);
+        contacts.add(contact2);
+        contacts.add(contact3);
+
+        return contacts;
+    }
+
+    @GetMapping("/javaUtilDate")
+    public List<ContactWithJavaUtilDate> getContactsWithJavaUtilDate() {
+        List<ContactWithJavaUtilDate> contacts = new ArrayList<>();
+
+        ContactWithJavaUtilDate contact1 = new ContactWithJavaUtilDate("John Doe", "123 Sesame Street", "123-456-789", new Date(), new Date());
+        ContactWithJavaUtilDate contact2 = new ContactWithJavaUtilDate("John Doe 2", "124 Sesame Street", "123-456-789", new Date(), new Date());
+        ContactWithJavaUtilDate contact3 = new ContactWithJavaUtilDate("John Doe 3", "125 Sesame Street", "123-456-789", new Date(), new Date());
+
+        contacts.add(contact1);
+        contacts.add(contact2);
+        contacts.add(contact3);
+
+        return contacts;
+    }
+
+    @GetMapping("/plain")
+    public List<PlainContact> getPlainContacts() {
+        List<PlainContact> contacts = new ArrayList<>();
+
+        PlainContact contact1 = new PlainContact("John Doe", "123 Sesame Street", "123-456-789", LocalDate.now(), LocalDateTime.now());
+        PlainContact contact2 = new PlainContact("John Doe 2", "124 Sesame Street", "123-456-789", LocalDate.now(), LocalDateTime.now());
+        PlainContact contact3 = new PlainContact("John Doe 3", "125 Sesame Street", "123-456-789", LocalDate.now(), LocalDateTime.now());
+
+        contacts.add(contact1);
+        contacts.add(contact2);
+        contacts.add(contact3);
+
+        return contacts;
+    }
+
+    @GetMapping("/plainWithJavaUtilDate")
+    public List<PlainContactWithJavaUtilDate> getPlainContactsWithJavaUtilDate() {
+        List<PlainContactWithJavaUtilDate> contacts = new ArrayList<>();
+
+        PlainContactWithJavaUtilDate contact1 = new PlainContactWithJavaUtilDate("John Doe", "123 Sesame Street", "123-456-789", new Date(), new Date());
+        PlainContactWithJavaUtilDate contact2 = new PlainContactWithJavaUtilDate("John Doe 2", "124 Sesame Street", "123-456-789", new Date(), new Date());
+        PlainContactWithJavaUtilDate contact3 = new PlainContactWithJavaUtilDate("John Doe 3", "125 Sesame Street", "123-456-789", new Date(), new Date());
+
+        contacts.add(contact1);
+        contacts.add(contact2);
+        contacts.add(contact3);
+
+        return contacts;
+    }
+
+}

spring-boot-modules/spring-boot-data/src/main/java/com/baeldung/jsondateformat/ContactWithJavaUtilDate.java

@@ -0,0 +1,69 @@
+package com.baeldung.jsondateformat;
+
+import com.fasterxml.jackson.annotation.JsonFormat;
+
+import java.util.Date;
+
+public class ContactWithJavaUtilDate {
+
+    private String name;
+    private String address;
+    private String phone;
+
+    @JsonFormat(pattern="yyyy-MM-dd")
+    private Date birthday;
+
+    @JsonFormat(pattern="yyyy-MM-dd HH:mm:ss")
+    private Date lastUpdate;
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public String getAddress() {
+        return address;
+    }
+
+    public void setAddress(String address) {
+        this.address = address;
+    }
+
+    public String getPhone() {
+        return phone;
+    }
+
+    public void setPhone(String phone) {
+        this.phone = phone;
+    }
+
+    public Date getBirthday() {
+        return birthday;
+    }
+
+    public void setBirthday(Date birthday) {
+        this.birthday = birthday;
+    }
+
+    public Date getLastUpdate() {
+        return lastUpdate;
+    }
+
+    public void setLastUpdate(Date lastUpdate) {
+        this.lastUpdate = lastUpdate;
+    }
+
+    public ContactWithJavaUtilDate() {
+    }
+
+    public ContactWithJavaUtilDate(String name, String address, String phone, Date birthday, Date lastUpdate) {
+        this.name = name;
+        this.address = address;
+        this.phone = phone;
+        this.birthday = birthday;
+        this.lastUpdate = lastUpdate;
+    }
+}

spring-boot-modules/spring-boot-data/src/main/java/com/baeldung/jsondateformat/PlainContact.java

@@ -0,0 +1,66 @@
+package com.baeldung.jsondateformat;
+
+import java.time.LocalDate;
+import java.time.LocalDateTime;
+
+public class PlainContact {
+
+    private String name;
+    private String address;
+    private String phone;
+
+    private LocalDate birthday;
+
+    private LocalDateTime lastUpdate;
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public String getAddress() {
+        return address;
+    }
+
+    public void setAddress(String address) {
+        this.address = address;
+    }
+
+    public String getPhone() {
+        return phone;
+    }
+
+    public void setPhone(String phone) {
+        this.phone = phone;
+    }
+
+    public LocalDate getBirthday() {
+        return birthday;
+    }
+
+    public void setBirthday(LocalDate birthday) {
+        this.birthday = birthday;
+    }
+
+    public LocalDateTime getLastUpdate() {
+        return lastUpdate;
+    }
+
+    public void setLastUpdate(LocalDateTime lastUpdate) {
+        this.lastUpdate = lastUpdate;
+    }
+
+    public PlainContact() {
+    }
+
+    public PlainContact(String name, String address, String phone, LocalDate birthday, LocalDateTime lastUpdate) {
+        this.name = name;
+        this.address = address;
+        this.phone = phone;
+        this.birthday = birthday;
+        this.lastUpdate = lastUpdate;
+    }
+}

spring-boot-modules/spring-boot-data/src/main/java/com/baeldung/jsondateformat/PlainContactWithJavaUtilDate.java

@@ -0,0 +1,69 @@
+package com.baeldung.jsondateformat;
+
+import com.fasterxml.jackson.annotation.JsonFormat;
+
+import java.util.Date;
+
+public class PlainContactWithJavaUtilDate {
+
+    private String name;
+    private String address;
+    private String phone;
+
+    @JsonFormat(pattern="yyyy-MM-dd")
+    private Date birthday;
+
+    @JsonFormat(pattern="yyyy-MM-dd HH:mm:ss")
+    private Date lastUpdate;
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public String getAddress() {
+        return address;
+    }
+
+    public void setAddress(String address) {
+        this.address = address;
+    }
+
+    public String getPhone() {
+        return phone;
+    }
+
+    public void setPhone(String phone) {
+        this.phone = phone;
+    }
+
+    public Date getBirthday() {
+        return birthday;
+    }
+
+    public void setBirthday(Date birthday) {
+        this.birthday = birthday;
+    }
+
+    public Date getLastUpdate() {
+        return lastUpdate;
+    }
+
+    public void setLastUpdate(Date lastUpdate) {
+        this.lastUpdate = lastUpdate;
+    }
+
+    public PlainContactWithJavaUtilDate() {
+    }
+
+    public PlainContactWithJavaUtilDate(String name, String address, String phone, Date birthday, Date lastUpdate) {
+        this.name = name;
+        this.address = address;
+        this.phone = phone;
+        this.birthday = birthday;
+        this.lastUpdate = lastUpdate;
+    }
+}

spring-boot-modules/spring-boot-data/src/main/java/com/baeldung/jsonexception/CustomException.java

@@ -0,0 +1,11 @@
+package com.baeldung.jsonexception;
+
+public class CustomException extends RuntimeException {
+
+    private static final long serialVersionUID = 1L;
+
+    public CustomException() {
+        super("Custom exception message.");
+    }
+
+}

spring-boot-modules/spring-boot-data/src/main/java/com/baeldung/jsonexception/ErrorHandler.java

@@ -0,0 +1,17 @@
+package com.baeldung.jsonexception;
+
+import org.springframework.http.HttpStatus;
+import org.springframework.web.bind.annotation.ExceptionHandler;
+import org.springframework.web.bind.annotation.ResponseStatus;
+import org.springframework.web.bind.annotation.RestControllerAdvice;
+
+@RestControllerAdvice
+public class ErrorHandler {
+
+    @ExceptionHandler(CustomException.class)
+    @ResponseStatus(HttpStatus.INTERNAL_SERVER_ERROR)
+    public CustomException handleCustomException(CustomException ce) {
+        return ce;
+    }
+
+}

spring-boot-modules/spring-boot-data/src/main/java/com/baeldung/jsonexception/MainController.java

@@ -0,0 +1,14 @@
+package com.baeldung.jsonexception;
+
+import org.springframework.stereotype.Controller;
+import org.springframework.web.bind.annotation.GetMapping;
+
+@Controller
+public class MainController {
+
+    @GetMapping("/")
+    public void index() throws CustomException {
+        throw new CustomException();
+    }
+
+}

spring-boot-modules/spring-boot-data/src/main/java/com/baeldung/propertyeditor/PropertyEditorApplication.java

@@ -0,0 +1,12 @@
+package com.baeldung.propertyeditor;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class PropertyEditorApplication {
+
+    public static void main(String[] args) {
+        SpringApplication.run(PropertyEditorApplication.class, args);
+    }
+}

spring-boot-modules/spring-boot-data/src/main/java/com/baeldung/propertyeditor/PropertyEditorRestController.java

@@ -0,0 +1,36 @@
+package com.baeldung.propertyeditor;
+
+import org.springframework.http.MediaType;
+import org.springframework.web.bind.WebDataBinder;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.InitBinder;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+import com.baeldung.propertyeditor.creditcard.CreditCard;
+import com.baeldung.propertyeditor.exotictype.editor.CustomExoticTypeEditor;
+import com.baeldung.propertyeditor.exotictype.model.ExoticType;
+
+@RestController
+@RequestMapping(value = "/property-editor")
+public class PropertyEditorRestController {
+
+    @GetMapping(value = "/credit-card/{card-no}", 
+        produces = MediaType.APPLICATION_JSON_UTF8_VALUE)
+    public CreditCard parseCreditCardNumber(@PathVariable("card-no") CreditCard creditCard) {
+        return creditCard;
+    }
+    
+    @GetMapping(value = "/exotic-type/{value}", 
+        produces = MediaType.APPLICATION_JSON_UTF8_VALUE)
+    public ExoticType parseExoticType(@PathVariable("value") ExoticType exoticType) {
+        return exoticType;
+    }
+    
+    @InitBinder
+    public void initBinder(WebDataBinder binder) {
+        binder.registerCustomEditor(ExoticType.class, new CustomExoticTypeEditor());
+    }
+    
+}

spring-boot-modules/spring-boot-data/src/main/java/com/baeldung/propertyeditor/creditcard/CreditCard.java

@@ -0,0 +1,41 @@
+package com.baeldung.propertyeditor.creditcard;
+
+public class CreditCard {
+
+    private String rawCardNumber;
+    
+    private Integer bankIdNo;
+    
+    private Integer accountNo;
+    
+    private Integer checkCode;
+    
+    public String getRawCardNumber() {
+        return rawCardNumber;
+    }
+    public void setRawCardNumber(String rawCardNumber) {
+        this.rawCardNumber = rawCardNumber;
+    }
+    
+    public Integer getBankIdNo() {
+        return bankIdNo;
+    }
+    public void setBankIdNo(Integer bankIdNo) {
+        this.bankIdNo = bankIdNo;
+    }
+    
+    public Integer getAccountNo() {
+        return accountNo;
+    }
+    public void setAccountNo(Integer accountNo) {
+        this.accountNo = accountNo;
+    }
+    
+    public Integer getCheckCode() {
+        return checkCode;
+    }
+    public void setCheckCode(Integer checkCode) {
+        this.checkCode = checkCode;
+    }
+    
+}

spring-boot-modules/spring-boot-data/src/main/java/com/baeldung/propertyeditor/creditcard/CreditCardEditor.java

@@ -0,0 +1,39 @@
+package com.baeldung.propertyeditor.creditcard;
+
+import java.beans.PropertyEditorSupport;
+
+import org.springframework.util.StringUtils;
+
+public class CreditCardEditor extends PropertyEditorSupport {
+
+    @Override
+    public String getAsText() {
+        CreditCard creditCard = (CreditCard) getValue();
+        
+        return creditCard == null ? "" : creditCard.getRawCardNumber();
+    }
+    
+    @Override
+    public void setAsText(String text) throws IllegalArgumentException {
+        if (StringUtils.isEmpty(text)) {
+            setValue(null);
+        } else {
+            CreditCard creditCard = new CreditCard();
+            creditCard.setRawCardNumber(text);
+            
+            String cardNo = text.replaceAll("-", "");
+            if (cardNo.length() != 16)
+                throw new IllegalArgumentException("Credit card format should be xxxx-xxxx-xxxx-xxxx");
+            
+            try {
+                creditCard.setBankIdNo( Integer.valueOf(cardNo.substring(0, 6)) );
+                creditCard.setAccountNo( Integer.valueOf(cardNo.substring(6, cardNo.length() - 1)) );
+                creditCard.setCheckCode( Integer.valueOf(cardNo.substring(cardNo.length() - 1)) );
+            } catch (NumberFormatException nfe) {
+                throw new IllegalArgumentException(nfe);
+            }
+            
+            setValue(creditCard);
+        }
+    }
+}

spring-boot-modules/spring-boot-data/src/main/java/com/baeldung/propertyeditor/exotictype/editor/CustomExoticTypeEditor.java

@@ -0,0 +1,23 @@
+package com.baeldung.propertyeditor.exotictype.editor;
+
+import java.beans.PropertyEditorSupport;
+
+import com.baeldung.propertyeditor.exotictype.model.ExoticType;
+
+public class CustomExoticTypeEditor extends PropertyEditorSupport {
+
+    @Override
+    public String getAsText() {
+        ExoticType exoticType = (ExoticType) getValue();
+
+        return exoticType == null ? "" : exoticType.getName();
+    }
+    
+    @Override
+    public void setAsText(String text) throws IllegalArgumentException {
+        ExoticType exoticType = new ExoticType();
+        exoticType.setName(text.toUpperCase());
+        
+        setValue(exoticType);
+    }
+}

spring-boot-modules/spring-boot-data/src/main/java/com/baeldung/propertyeditor/exotictype/model/ExoticType.java

@@ -0,0 +1,14 @@
+package com.baeldung.propertyeditor.exotictype.model;
+
+public class ExoticType {
+
+    private String name;
+        
+    public String getName() {
+        return name;
+    }
+    public void setName(String name) {
+        this.name = name;
+    }
+    
+}

spring-boot-modules/spring-boot-data/src/main/resources/application.properties

@@ -0,0 +1,25 @@
+spring.jackson.date-format=yyyy-MM-dd HH:mm:ss
+spring.jackson.time-zone=Europe/Zagreb
+spring.h2.console.path=/h2
+spring.h2.console.enabled=true
+spring.datasource.url=jdbc:h2:mem:testdb
+spring.datasource.driver-class-name=org.h2.Driver
+spring.datasource.username=sa
+spring.datasource.password=
+spring.main.allow-bean-definition-overriding=true
+javers.mappingStyle=FIELD
+javers.algorithm=SIMPLE
+javers.commitIdGenerator=synchronized_sequence
+javers.prettyPrint=true
+javers.typeSafeValues=false
+javers.newObjectSnapshot=true
+javers.packagesToScan=
+javers.auditableAspectEnabled=true
+javers.springDataAuditableRepositoryAspectEnabled=true
+javers.sqlSchema=
+javers.sqlSchemaManagementEnabled=true
+javers.prettyPrintDateFormats.localDateTime=dd MMM yyyy, HH:mm:ss
+javers.prettyPrintDateFormats.zonedDateTime=dd MMM yyyy, HH:mm:ssZ
+javers.prettyPrintDateFormats.localDate=dd MMM yyyy
+javers.prettyPrintDateFormats.localTime=HH:mm:ss
+

spring-boot-modules/spring-boot-data/src/test/java/com/baeldung/disableautoconfig/SpringDataJPAIntegrationTest.java

@@ -0,0 +1,26 @@
+package com.baeldung.disableautoconfig;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.NoSuchBeanDefinitionException;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.context.ApplicationContext;
+import org.springframework.test.context.junit4.SpringRunner;
+
+import javax.sql.DataSource;
+
+
+@RunWith(SpringRunner.class)
+@SpringBootTest(classes = SpringDataJPA.class)
+public class SpringDataJPAIntegrationTest {
+
+    @Autowired
+    private ApplicationContext context;
+
+    @Test(expected = NoSuchBeanDefinitionException.class)
+    public void givenAutoConfigDisabled_whenStarting_thenNoAutoconfiguredBeansInContext() {
+        context.getBean(DataSource.class);
+    }
+
+}

spring-boot-modules/spring-boot-data/src/test/java/com/baeldung/disableautoconfig/SpringDataMongoDBIntegrationTest.java

@@ -0,0 +1,25 @@
+package com.baeldung.disableautoconfig;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.NoSuchBeanDefinitionException;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.context.ApplicationContext;
+import org.springframework.data.mongodb.core.MongoTemplate;
+import org.springframework.test.context.junit4.SpringRunner;
+
+
+@RunWith(SpringRunner.class)
+@SpringBootTest(classes = SpringDataMongoDB.class)
+public class SpringDataMongoDBIntegrationTest {
+
+    @Autowired
+    private ApplicationContext context;
+
+    @Test(expected = NoSuchBeanDefinitionException.class)
+    public void givenAutoConfigDisabled_whenStarting_thenNoAutoconfiguredBeansInContext() {
+        context.getBean(MongoTemplate.class);
+    }
+
+}

spring-boot-modules/spring-boot-data/src/test/java/com/baeldung/disableautoconfig/SpringDataRedisIntegrationTest.java

@@ -0,0 +1,25 @@
+package com.baeldung.disableautoconfig;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.NoSuchBeanDefinitionException;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.context.ApplicationContext;
+import org.springframework.data.redis.core.RedisTemplate;
+import org.springframework.test.context.junit4.SpringRunner;
+
+
+@RunWith(SpringRunner.class)
+@SpringBootTest(classes = SpringDataRedis.class)
+public class SpringDataRedisIntegrationTest {
+
+    @Autowired
+    private ApplicationContext context;
+
+    @Test(expected = NoSuchBeanDefinitionException.class)
+    public void givenAutoConfigDisabled_whenStarting_thenNoAutoconfiguredBeansInContext() {
+        context.getBean(RedisTemplate.class);
+    }
+
+}

spring-boot-modules/spring-boot-data/src/test/java/com/baeldung/jsondateformat/ContactAppIntegrationTest.java

@@ -0,0 +1,100 @@
+package com.baeldung.jsondateformat;
+
+import com.fasterxml.jackson.core.type.TypeReference;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.boot.test.web.client.TestRestTemplate;
+import org.springframework.boot.web.server.LocalServerPort;
+import org.springframework.http.ResponseEntity;
+import org.springframework.test.context.TestPropertySource;
+import org.springframework.test.context.junit4.SpringRunner;
+
+import java.io.IOException;
+import java.text.ParseException;
+import java.time.LocalDate;
+import java.time.LocalDateTime;
+import java.time.format.DateTimeFormatter;
+import java.time.format.DateTimeParseException;
+import java.util.List;
+import java.util.Map;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertNotNull;
+import static org.springframework.boot.test.context.SpringBootTest.WebEnvironment.RANDOM_PORT;
+
+@RunWith(SpringRunner.class)
+@SpringBootTest(webEnvironment = RANDOM_PORT, classes = ContactApp.class)
+@TestPropertySource(properties = {
+        "spring.jackson.date-format=yyyy-MM-dd HH:mm:ss"
+})
+public class ContactAppIntegrationTest {
+
+    private final ObjectMapper mapper = new ObjectMapper();
+
+    @LocalServerPort
+    private int port;
+
+    @Autowired
+    private TestRestTemplate restTemplate;
+
+    @Test
+    public void givenJsonFormatAnnotationAndJava8DateType_whenGet_thenReturnExpectedDateFormat() throws IOException, ParseException {
+        ResponseEntity<String> response = restTemplate.getForEntity("http://localhost:" + port + "/contacts", String.class);
+
+        assertEquals(200, response.getStatusCodeValue());
+
+        List<Map<String, String>> respMap = mapper.readValue(response.getBody(), new TypeReference<List<Map<String, String>>>(){});
+
+        LocalDate birthdayDate = LocalDate.parse(respMap.get(0).get("birthday"), DateTimeFormatter.ofPattern("yyyy-MM-dd"));
+        LocalDateTime lastUpdateTime = LocalDateTime.parse(respMap.get(0).get("lastUpdate"), DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss"));
+
+        assertNotNull(birthdayDate);
+        assertNotNull(lastUpdateTime);
+    }
+
+    @Test
+    public void givenJsonFormatAnnotationAndLegacyDateType_whenGet_thenReturnExpectedDateFormat() throws IOException {
+        ResponseEntity<String> response = restTemplate.getForEntity("http://localhost:" + port + "/contacts/javaUtilDate", String.class);
+
+        assertEquals(200, response.getStatusCodeValue());
+
+        List<Map<String, String>> respMap = mapper.readValue(response.getBody(), new TypeReference<List<Map<String, String>>>(){});
+
+        LocalDate birthdayDate = LocalDate.parse(respMap.get(0).get("birthday"), DateTimeFormatter.ofPattern("yyyy-MM-dd"));
+        LocalDateTime lastUpdateTime = LocalDateTime.parse(respMap.get(0).get("lastUpdate"), DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss"));
+
+        assertNotNull(birthdayDate);
+        assertNotNull(lastUpdateTime);
+    }
+
+    @Test
+    public void givenDefaultDateFormatInAppPropertiesAndLegacyDateType_whenGet_thenReturnExpectedDateFormat() throws IOException {
+        ResponseEntity<String> response = restTemplate.getForEntity("http://localhost:" + port + "/contacts/plainWithJavaUtilDate", String.class);
+
+        assertEquals(200, response.getStatusCodeValue());
+
+        List<Map<String, String>> respMap = mapper.readValue(response.getBody(), new TypeReference<List<Map<String, String>>>(){});
+
+        LocalDate birthdayDate = LocalDate.parse(respMap.get(0).get("birthday"), DateTimeFormatter.ofPattern("yyyy-MM-dd"));
+        LocalDateTime lastUpdateTime = LocalDateTime.parse(respMap.get(0).get("lastUpdate"), DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss"));
+
+        assertNotNull(birthdayDate);
+        assertNotNull(lastUpdateTime);
+    }
+
+    @Test(expected = DateTimeParseException.class)
+    public void givenDefaultDateFormatInAppPropertiesAndJava8DateType_whenGet_thenNotApplyFormat() throws IOException {
+        ResponseEntity<String> response = restTemplate.getForEntity("http://localhost:" + port + "/contacts/plain", String.class);
+
+        assertEquals(200, response.getStatusCodeValue());
+
+        List<Map<String, String>> respMap = mapper.readValue(response.getBody(), new TypeReference<List<Map<String, String>>>(){});
+
+        LocalDate birthdayDate = LocalDate.parse(respMap.get(0).get("birthday"), DateTimeFormatter.ofPattern("yyyy-MM-dd"));
+        LocalDateTime lastUpdateTime = LocalDateTime.parse(respMap.get(0).get("lastUpdate"), DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss"));
+    }
+
+}

spring-boot-modules/spring-boot-data/src/test/java/com/baeldung/jsondateformat/ContactAppWithObjectMapperCustomizerIntegrationTest.java

@@ -0,0 +1,67 @@
+package com.baeldung.jsondateformat;
+
+import com.fasterxml.jackson.core.type.TypeReference;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.boot.test.web.client.TestRestTemplate;
+import org.springframework.boot.web.server.LocalServerPort;
+import org.springframework.http.ResponseEntity;
+import org.springframework.test.context.junit4.SpringRunner;
+
+import java.io.IOException;
+import java.time.LocalDate;
+import java.time.LocalDateTime;
+import java.time.format.DateTimeFormatter;
+import java.util.List;
+import java.util.Map;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertNotNull;
+import static org.springframework.boot.test.context.SpringBootTest.WebEnvironment.RANDOM_PORT;
+
+@RunWith(SpringRunner.class)
+@SpringBootTest(webEnvironment = RANDOM_PORT, classes = ContactApp.class)
+public class ContactAppWithObjectMapperCustomizerIntegrationTest {
+
+    private final ObjectMapper mapper = new ObjectMapper();
+
+    @Autowired
+    private TestRestTemplate restTemplate;
+
+    @LocalServerPort
+    private int port;
+
+    @Test
+    public void givenDefaultDateFormatInAppPropertiesAndLegacyDateType_whenGet_thenReturnExpectedDateFormat() throws IOException {
+        ResponseEntity<String> response = restTemplate.getForEntity("http://localhost:" + this.port + "/contacts/plainWithJavaUtilDate", String.class);
+
+        assertEquals(200, response.getStatusCodeValue());
+
+        List<Map<String, String>> respMap = mapper.readValue(response.getBody(), new TypeReference<List<Map<String, String>>>(){});
+
+        LocalDate birthdayDate = LocalDate.parse(respMap.get(0).get("birthday"), DateTimeFormatter.ofPattern("yyyy-MM-dd"));
+        LocalDateTime lastUpdateTime = LocalDateTime.parse(respMap.get(0).get("lastUpdate"), DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss"));
+
+        assertNotNull(birthdayDate);
+        assertNotNull(lastUpdateTime);
+    }
+
+    @Test
+    public void givenDefaultDateFormatInAppPropertiesAndJava8DateType_whenGet_thenReturnExpectedDateFormat() throws IOException {
+        ResponseEntity<String> response = restTemplate.getForEntity("http://localhost:" + this.port + "/contacts/plain", String.class);
+
+        assertEquals(200, response.getStatusCodeValue());
+
+        List<Map<String, String>> respMap = mapper.readValue(response.getBody(), new TypeReference<List<Map<String, String>>>(){});
+
+        LocalDate birthdayDate = LocalDate.parse(respMap.get(0).get("birthday"), DateTimeFormatter.ofPattern("yyyy-MM-dd"));
+        LocalDateTime lastUpdateTime = LocalDateTime.parse(respMap.get(0).get("lastUpdate"), DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss"));
+
+        assertNotNull(birthdayDate);
+        assertNotNull(lastUpdateTime);
+    }
+
+}

spring-boot-modules/spring-boot-data/src/test/java/com/baeldung/jsonexception/MainControllerIntegrationTest.java

@@ -0,0 +1,19 @@
+package com.baeldung.jsonexception;
+
+import org.junit.Test;
+
+import com.baeldung.jsonexception.CustomException;
+import com.baeldung.jsonexception.MainController;
+
+public class MainControllerIntegrationTest {
+
+    @Test(expected = CustomException.class)
+    public void givenIndex_thenCustomException() throws CustomException {
+
+        MainController mainController = new MainController();
+
+        mainController.index();
+
+    }
+
+}

spring-boot-modules/spring-boot-data/src/test/java/com/baeldung/propertyeditor/creditcard/CreditCardEditorUnitTest.java

@@ -0,0 +1,41 @@
+package com.baeldung.propertyeditor.creditcard;
+
+import org.junit.Assert;
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.junit.MockitoJUnitRunner;
+
+@RunWith(MockitoJUnitRunner.class)
+public class CreditCardEditorUnitTest {
+    
+    private CreditCardEditor creditCardEditor;
+    
+    @Before
+    public void setup() {
+        creditCardEditor = new CreditCardEditor();
+    }
+    
+    @Test(expected=IllegalArgumentException.class)
+    public void whenInvalidCardNoWithLessDigits_thenThrowsException() {
+        creditCardEditor.setAsText("123-123-123-123");
+    }
+    
+    @Test(expected=IllegalArgumentException.class)
+    public void whenInvalidCardNoWithNonDigits_thenThrowsException() {
+        creditCardEditor.setAsText("1234-1234-xxxx-yyyy");
+    }
+    
+    @Test
+    public void whenCardNoWithNonDigits_parseCreditCard() {
+        creditCardEditor.setAsText("1234-5678-9123-4560");
+        
+        CreditCard creditCard = (CreditCard) creditCardEditor.getValue();
+        Assert.assertNotNull(creditCard);
+        
+        Assert.assertEquals(123456, creditCard.getBankIdNo().intValue());
+        Assert.assertEquals(789123456, creditCard.getAccountNo().intValue());
+        Assert.assertEquals(0, creditCard.getCheckCode().intValue());
+    }
+
+}

spring-boot-modules/spring-boot-properties/README.md

@@ -0,0 +1,14 @@
+## Spring Boot Properties
+
+This module contains articles about Properties in Spring Boot.
+
+### Relevant Articles:
+- [Reloading Properties Files in Spring](https://www.baeldung.com/spring-reloading-properties)
+- [Guide to @ConfigurationProperties in Spring Boot](https://www.baeldung.com/configuration-properties-in-spring-boot)
+- [Load Spring Boot Properties From a JSON File](https://www.baeldung.com/spring-boot-json-properties)
+- [Guide to @EnableConfigurationProperties](https://www.baeldung.com/spring-enable-config-properties)
+- [Properties with Spring and Spring Boot](https://www.baeldung.com/properties-with-spring) - checkout the `com.baeldung.properties` package for all scenarios of properties injection and usage
+- [A Quick Guide to Spring @Value](https://www.baeldung.com/spring-value-annotation)
+- [Spring YAML Configuration](https://www.baeldung.com/spring-yaml)
+- [Using Spring @Value with Defaults](https://www.baeldung.com/spring-value-defaults)
+- [How to Inject a Property Value Into a Class Not Managed by Spring?](https://www.baeldung.com/inject-properties-value-non-spring-class)

spring-boot-modules/spring-boot-properties/extra.properties

@@ -0,0 +1 @@
+application.theme.color=blue

spring-boot-modules/spring-boot-properties/extra2.properties

@@ -0,0 +1 @@
+application.theme.background=red

spring-boot-modules/spring-boot-properties/pom.xml

@@ -0,0 +1,111 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <artifactId>spring-boot-properties</artifactId>
+    <name>spring-boot-properties</name>
+    <packaging>jar</packaging>
+    <description>Spring Boot Properties Module</description>
+
+    <parent>
+        <groupId>com.baeldung</groupId>
+        <artifactId>parent-boot-2</artifactId>
+        <version>0.0.1-SNAPSHOT</version>
+        <relativePath>../../parent-boot-2</relativePath>
+    </parent>
+
+    <dependencies>
+        <dependency>
+            <groupId>commons-configuration</groupId>
+            <artifactId>commons-configuration</artifactId>
+            <version>${commons-configuration.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-web</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-actuator</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework.cloud</groupId>
+            <artifactId>spring-cloud-starter</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>com.google.guava</groupId>
+            <artifactId>guava</artifactId>
+            <version>${guava.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.apache.httpcomponents</groupId>
+            <artifactId>httpcore</artifactId>
+            <version>${httpcore.version}</version>
+        </dependency>
+    </dependencies>
+
+    <dependencyManagement>
+        <dependencies>
+            <dependency>
+                <groupId>org.springframework.cloud</groupId>
+                <artifactId>spring-cloud-dependencies</artifactId>
+                <version>${spring-cloud.version}</version>
+                <type>pom</type>
+                <scope>import</scope>
+            </dependency>
+        </dependencies>
+    </dependencyManagement>
+
+    <build>
+        <finalName>spring-boot-properties</finalName>
+        <resources>
+            <resource>
+                <directory>src/main/resources</directory>
+                <filtering>true</filtering>
+            </resource>
+        </resources>
+    </build>
+
+    <profiles>
+        <profile>
+            <id>integration</id>
+            <build>
+                <plugins>
+                    <plugin>
+                        <groupId>org.apache.maven.plugins</groupId>
+                        <artifactId>maven-surefire-plugin</artifactId>
+                        <executions>
+                            <execution>
+                                <phase>integration-test</phase>
+                                <goals>
+                                    <goal>test</goal>
+                                </goals>
+                                <configuration>
+                                    <excludes>
+                                        <exclude>**/*LiveTest.java</exclude>
+                                        <exclude>**/*IntegrationTest.java</exclude>
+                                        <exclude>**/*IntTest.java</exclude>
+                                    </excludes>
+                                </configuration>
+                            </execution>
+                        </executions>
+                        <configuration>
+                            <systemPropertyVariables>
+                                <test.mime>json</test.mime>
+                            </systemPropertyVariables>
+                        </configuration>
+                    </plugin>
+                </plugins>
+            </build>
+        </profile>
+    </profiles>
+
+    <properties>
+        <java.version>1.8</java.version>
+        <spring-cloud.version>Greenwich.SR1</spring-cloud.version>
+        <commons-configuration.version>1.10</commons-configuration.version>
+        <guava.version>20.0</guava.version>
+        <httpcore.version>4.4.11</httpcore.version>
+    </properties>
+
+</project>

spring-boot-modules/spring-boot-properties/src/main/java/com/baeldung/configurationproperties/ConfigProperties.java

@@ -0,0 +1,124 @@
+package com.baeldung.configurationproperties;
+
+import java.util.List;
+import java.util.Map;
+
+import javax.validation.constraints.Max;
+import javax.validation.constraints.Min;
+import javax.validation.constraints.NotBlank;
+import javax.validation.constraints.Pattern;
+
+import org.hibernate.validator.constraints.Length;
+import org.springframework.boot.context.properties.ConfigurationProperties;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.context.annotation.PropertySource;
+import org.springframework.validation.annotation.Validated;
+
+@Configuration
+@PropertySource("classpath:configprops.properties")
+@ConfigurationProperties(prefix = "mail")
+@Validated
+public class ConfigProperties {
+
+    @Validated
+    public static class Credentials {
+
+        @Length(max = 4, min = 1)
+        private String authMethod;
+        private String username;
+        private String password;
+
+        public String getAuthMethod() {
+            return authMethod;
+        }
+
+        public void setAuthMethod(String authMethod) {
+            this.authMethod = authMethod;
+        }
+
+        public String getUsername() {
+            return username;
+        }
+
+        public void setUsername(String username) {
+            this.username = username;
+        }
+
+        public String getPassword() {
+            return password;
+        }
+
+        public void setPassword(String password) {
+            this.password = password;
+        }
+    }
+
+    @NotBlank
+    private String hostName;
+
+    @Min(1025)
+    @Max(65536)
+    private int port;
+
+    @Pattern(regexp = "^[a-z0-9._%+-]+@[a-z0-9.-]+\\.[a-z]{2,6}$")
+    private String from;
+
+    private Credentials credentials;
+    private List<String> defaultRecipients;
+    private Map<String, String> additionalHeaders;
+
+    public String getHostName() {
+        return hostName;
+    }
+
+    public void setHostName(String hostName) {
+        this.hostName = hostName;
+    }
+
+    public int getPort() {
+        return port;
+    }
+
+    public void setPort(int port) {
+        this.port = port;
+    }
+
+    public String getFrom() {
+        return from;
+    }
+
+    public void setFrom(String from) {
+        this.from = from;
+    }
+
+    public Credentials getCredentials() {
+        return credentials;
+    }
+
+    public void setCredentials(Credentials credentials) {
+        this.credentials = credentials;
+    }
+
+    public List<String> getDefaultRecipients() {
+        return defaultRecipients;
+    }
+
+    public void setDefaultRecipients(List<String> defaultRecipients) {
+        this.defaultRecipients = defaultRecipients;
+    }
+
+    public Map<String, String> getAdditionalHeaders() {
+        return additionalHeaders;
+    }
+
+    public void setAdditionalHeaders(Map<String, String> additionalHeaders) {
+        this.additionalHeaders = additionalHeaders;
+    }
+    
+    @Bean
+    @ConfigurationProperties(prefix = "item")
+    public Item item(){
+        return new Item();
+    }
+}

spring-boot-modules/spring-boot-properties/src/main/java/com/baeldung/configurationproperties/Employee.java

@@ -0,0 +1,30 @@
+package com.baeldung.configurationproperties;
+
+public class Employee {
+
+    private String name;
+    private double salary;
+
+    public Employee(String name, double salary) {
+        super();
+        this.name = name;
+        this.salary = salary;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public double getSalary() {
+        return salary;
+    }
+
+    public void setSalary(double salary) {
+        this.salary = salary;
+    }
+
+}

spring-boot-modules/spring-boot-properties/src/main/java/com/baeldung/configurationproperties/EmployeeConverter.java

@@ -0,0 +1,16 @@
+package com.baeldung.configurationproperties;
+
+import org.springframework.boot.context.properties.ConfigurationPropertiesBinding;
+import org.springframework.core.convert.converter.Converter;
+import org.springframework.stereotype.Component;
+
+@Component
+@ConfigurationPropertiesBinding
+public class EmployeeConverter implements Converter<String, Employee> {
+
+    @Override
+    public Employee convert(String from) {
+        String[] data = from.split(",");
+        return new Employee(data[0], Double.parseDouble(data[1]));
+    }
+}

spring-boot-modules/spring-boot-properties/src/main/java/com/baeldung/configurationproperties/Item.java

@@ -0,0 +1,31 @@
+package com.baeldung.configurationproperties;
+
+public class Item {
+
+    private String name;
+    private int size;
+
+    public Item() {
+    }
+
+    public Item(String name, int size) {
+        this.name = name;
+        this.size = size;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public int getSize() {
+        return size;
+    }
+
+    public void setSize(int size) {
+        this.size = size;
+    }
+}

spring-boot-modules/spring-boot-properties/src/main/java/com/baeldung/configurationproperties/PropertiesConversionApplication.java

@@ -0,0 +1,14 @@
+package com.baeldung.configurationproperties;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.context.annotation.ComponentScan;
+
+@SpringBootApplication
+@ComponentScan(basePackageClasses = { PropertyConversion.class, EmployeeConverter.class })
+public class PropertiesConversionApplication {
+    public static void main(String[] args) {
+        SpringApplication.run(PropertiesConversionApplication.class, args);
+    }
+
+}

spring-boot-modules/spring-boot-properties/src/main/java/com/baeldung/configurationproperties/PropertyConversion.java

@@ -0,0 +1,92 @@
+package com.baeldung.configurationproperties;
+
+import java.time.Duration;
+import java.time.temporal.ChronoUnit;
+
+import org.springframework.boot.context.properties.ConfigurationProperties;
+import org.springframework.boot.convert.DataSizeUnit;
+import org.springframework.boot.convert.DurationUnit;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.context.annotation.PropertySource;
+import org.springframework.util.unit.DataSize;
+import org.springframework.util.unit.DataUnit;
+
+@Configuration
+@PropertySource("classpath:conversion.properties")
+@ConfigurationProperties(prefix = "conversion")
+public class PropertyConversion {
+    private Duration timeInDefaultUnit;
+
+    private Duration timeInNano;
+
+    @DurationUnit(ChronoUnit.DAYS)
+    private Duration timeInDays;
+
+    private DataSize sizeInDefaultUnit;
+
+    private DataSize sizeInGB;
+
+    @DataSizeUnit(DataUnit.TERABYTES)
+    private DataSize sizeInTB;
+
+    private Employee employee;
+
+    // Getters and setters
+
+    public Duration getTimeInDefaultUnit() {
+        return timeInDefaultUnit;
+    }
+
+    public void setTimeInDefaultUnit(Duration timeInDefaultUnit) {
+        this.timeInDefaultUnit = timeInDefaultUnit;
+    }
+
+    public Duration getTimeInNano() {
+        return timeInNano;
+    }
+
+    public void setTimeInNano(Duration timeInNano) {
+        this.timeInNano = timeInNano;
+    }
+
+    public Duration getTimeInDays() {
+        return timeInDays;
+    }
+
+    public void setTimeInDays(Duration timeInDays) {
+        this.timeInDays = timeInDays;
+    }
+
+    public DataSize getSizeInDefaultUnit() {
+        return sizeInDefaultUnit;
+    }
+
+    public void setSizeInDefaultUnit(DataSize sizeInDefaultUnit) {
+        this.sizeInDefaultUnit = sizeInDefaultUnit;
+    }
+
+    public DataSize getSizeInGB() {
+        return sizeInGB;
+    }
+
+    public void setSizeInGB(DataSize sizeInGB) {
+        this.sizeInGB = sizeInGB;
+    }
+
+    public DataSize getSizeInTB() {
+        return sizeInTB;
+    }
+
+    public void setSizeInTB(DataSize sizeInTB) {
+        this.sizeInTB = sizeInTB;
+    }
+
+    public Employee getEmployee() {
+        return employee;
+    }
+
+    public void setEmployee(Employee employee) {
+        this.employee = employee;
+    }
+
+}

spring-boot-modules/spring-boot-properties/src/main/java/com/baeldung/properties/AdditionalConfiguration.java

@@ -0,0 +1,14 @@
+package com.baeldung.properties;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.context.properties.EnableConfigurationProperties;
+import org.springframework.context.annotation.Configuration;
+
+@Configuration
+@EnableConfigurationProperties(AdditionalProperties.class)
+public class AdditionalConfiguration {
+
+    @Autowired
+    private AdditionalProperties additionalProperties;
+
+}

spring-boot-modules/spring-boot-properties/src/main/java/com/baeldung/properties/AdditionalProperties.java

@@ -0,0 +1,28 @@
+package com.baeldung.properties;
+
+import org.springframework.boot.context.properties.ConfigurationProperties;
+import org.springframework.context.annotation.Configuration;
+
+@Configuration
+@ConfigurationProperties(prefix = "additional")
+public class AdditionalProperties {
+
+    private String unit;
+    private int max;
+
+    public String getUnit() {
+        return unit;
+    }
+
+    public void setUnit(String unit) {
+        this.unit = unit;
+    }
+
+    public int getMax() {
+        return max;
+    }
+
+    public void setMax(int max) {
+        this.max = max;
+    }
+}

spring-boot-modules/spring-boot-properties/src/main/java/com/baeldung/properties/ConfigPropertiesDemoApplication.java

@@ -0,0 +1,17 @@
+package com.baeldung.properties;
+
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.boot.builder.SpringApplicationBuilder;
+import org.springframework.context.annotation.ComponentScan;
+
+import com.baeldung.configurationproperties.ConfigProperties;
+
+@SpringBootApplication
+@ComponentScan(basePackageClasses = { ConfigProperties.class, JsonProperties.class, CustomJsonProperties.class })
+public class ConfigPropertiesDemoApplication {
+    public static void main(String[] args) {
+        new SpringApplicationBuilder(ConfigPropertiesDemoApplication.class).initializers(new JsonPropertyContextInitializer())
+            .run();
+    }
+
+}

spring-boot-modules/spring-boot-properties/src/main/java/com/baeldung/properties/CustomJsonProperties.java

@@ -0,0 +1,71 @@
+package com.baeldung.properties;
+
+import org.springframework.boot.context.properties.ConfigurationProperties;
+import org.springframework.stereotype.Component;
+
+@Component
+@ConfigurationProperties(prefix = "custom")
+public class CustomJsonProperties {
+
+    private String host;
+
+    private int port;
+
+    private boolean resend;
+
+    private Person sender;
+
+    public static class Person {
+
+        private String name;
+        private String address;
+
+        public String getName() {
+            return name;
+        }
+
+        public void setName(String name) {
+            this.name = name;
+        }
+
+        public String getAddress() {
+            return address;
+        }
+
+        public void setAddress(String address) {
+            this.address = address;
+        }
+    }
+
+    public String getHost() {
+        return host;
+    }
+
+    public void setHost(String host) {
+        this.host = host;
+    }
+
+    public int getPort() {
+        return port;
+    }
+
+    public void setPort(int port) {
+        this.port = port;
+    }
+
+    public boolean isResend() {
+        return resend;
+    }
+
+    public void setResend(boolean resend) {
+        this.resend = resend;
+    }
+
+    public Person getSender() {
+        return sender;
+    }
+
+    public void setSender(Person sender) {
+        this.sender = sender;
+    }
+}

spring-boot-modules/spring-boot-properties/src/main/java/com/baeldung/properties/JsonProperties.java

@@ -0,0 +1,64 @@
+package com.baeldung.properties;
+
+import java.util.LinkedHashMap;
+import java.util.List;
+
+import org.springframework.boot.context.properties.ConfigurationProperties;
+import org.springframework.context.annotation.PropertySource;
+import org.springframework.stereotype.Component;
+
+@Component
+@PropertySource(value = "classpath:configprops.json", factory = JsonPropertySourceFactory.class)
+@ConfigurationProperties
+public class JsonProperties {
+
+    private String host;
+
+    private int port;
+
+    private boolean resend;
+
+    private List<String> topics;
+
+    private LinkedHashMap<String, ?> sender;
+
+    public LinkedHashMap<String, ?> getSender() {
+        return sender;
+    }
+
+    public void setSender(LinkedHashMap<String, ?> sender) {
+        this.sender = sender;
+    }
+
+    public List<String> getTopics() {
+        return topics;
+    }
+
+    public void setTopics(List<String> topics) {
+        this.topics = topics;
+    }
+
+    public int getPort() {
+        return port;
+    }
+
+    public void setPort(int port) {
+        this.port = port;
+    }
+
+    public boolean isResend() {
+        return resend;
+    }
+
+    public void setResend(boolean resend) {
+        this.resend = resend;
+    }
+
+    public String getHost() {
+        return host;
+    }
+
+    public void setHost(String host) {
+        this.host = host;
+    }
+}

spring-boot-modules/spring-boot-properties/src/main/java/com/baeldung/properties/JsonPropertyContextInitializer.java

@@ -0,0 +1,68 @@
+package com.baeldung.properties;
+
+import java.io.IOException;
+import java.util.Collection;
+import java.util.Collections;
+import java.util.LinkedHashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Optional;
+import java.util.Set;
+import java.util.stream.Collectors;
+
+import org.springframework.context.ApplicationContextInitializer;
+import org.springframework.context.ConfigurableApplicationContext;
+import org.springframework.core.env.MapPropertySource;
+import org.springframework.core.env.PropertySource;
+import org.springframework.core.io.Resource;
+
+import com.fasterxml.jackson.databind.ObjectMapper;
+
+public class JsonPropertyContextInitializer implements ApplicationContextInitializer<ConfigurableApplicationContext> {
+
+    private final static String CUSTOM_PREFIX = "custom.";
+
+    @Override
+    @SuppressWarnings("unchecked")
+    public void initialize(ConfigurableApplicationContext configurableApplicationContext) {
+        try {
+            Resource resource = configurableApplicationContext.getResource("classpath:configprops.json");
+            Map readValue = new ObjectMapper().readValue(resource.getInputStream(), Map.class);
+            Set<Map.Entry> set = readValue.entrySet();
+            List<MapPropertySource> propertySources = convertEntrySet(set, Optional.empty());
+            for (PropertySource propertySource : propertySources) {
+                configurableApplicationContext.getEnvironment()
+                    .getPropertySources()
+                    .addFirst(propertySource);
+            }
+        } catch (IOException e) {
+            throw new RuntimeException(e);
+        }
+    }
+
+    private static List<MapPropertySource> convertEntrySet(Set<Map.Entry> entrySet, Optional<String> parentKey) {
+        return entrySet.stream()
+            .map((Map.Entry e) -> convertToPropertySourceList(e, parentKey))
+            .flatMap(Collection::stream)
+            .collect(Collectors.toList());
+    }
+
+    private static List<MapPropertySource> convertToPropertySourceList(Map.Entry e, Optional<String> parentKey) {
+        String key = parentKey.map(s -> s + ".")
+            .orElse("") + (String) e.getKey();
+        Object value = e.getValue();
+        return covertToPropertySourceList(key, value);
+    }
+
+    @SuppressWarnings("unchecked")
+    private static List<MapPropertySource> covertToPropertySourceList(String key, Object value) {
+        if (value instanceof LinkedHashMap) {
+            LinkedHashMap map = (LinkedHashMap) value;
+            Set<Map.Entry> entrySet = map.entrySet();
+            return convertEntrySet(entrySet, Optional.ofNullable(key));
+        }
+        String finalKey = CUSTOM_PREFIX + key;
+        return Collections.singletonList(new MapPropertySource(finalKey, Collections.singletonMap(finalKey, value)));
+    }
+
+}

spring-boot-modules/spring-boot-properties/src/main/java/com/baeldung/properties/JsonPropertySourceFactory.java

@@ -0,0 +1,21 @@
+package com.baeldung.properties;
+
+import java.io.IOException;
+import java.util.Map;
+
+import org.springframework.core.env.MapPropertySource;
+import org.springframework.core.env.PropertySource;
+import org.springframework.core.io.support.EncodedResource;
+import org.springframework.core.io.support.PropertySourceFactory;
+
+import com.fasterxml.jackson.databind.ObjectMapper;
+
+public class JsonPropertySourceFactory implements PropertySourceFactory {
+
+    @Override
+    public PropertySource<?> createPropertySource(String name, EncodedResource resource) throws IOException {
+        Map readValue = new ObjectMapper().readValue(resource.getInputStream(), Map.class);
+        return new MapPropertySource("json-property", readValue);
+    }
+
+}

spring-boot-modules/spring-boot-properties/src/main/java/com/baeldung/properties/core/ComponentInXmlUsingProperties.java

@@ -0,0 +1,30 @@
+package com.baeldung.properties.core;
+
+import org.springframework.beans.factory.InitializingBean;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.core.env.Environment;
+
+public class ComponentInXmlUsingProperties implements InitializingBean {
+
+    @Autowired
+    private Environment env;
+
+    @Value("${key.something}")
+    private String injectedProperty;
+
+    public ComponentInXmlUsingProperties(final String propertyValue) {
+        super();
+
+        System.out.println("Constructor Injection - Property Value resolved to: " + propertyValue);
+    }
+
+    //
+
+    @Override
+    public void afterPropertiesSet() throws Exception {
+        System.out.println("in afterPropertiesSet via @Value: " + injectedProperty);
+        System.out.println("in afterPropertiesSet Environment: " + env.getProperty("key.something"));
+    }
+
+}

spring-boot-modules/spring-boot-properties/src/main/java/com/baeldung/properties/core/ComponentUsingProperties.java

@@ -0,0 +1,30 @@
+package com.baeldung.properties.core;
+
+import org.springframework.beans.factory.InitializingBean;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.core.env.Environment;
+import org.springframework.stereotype.Component;
+
+@Component
+public class ComponentUsingProperties implements InitializingBean {
+
+    @Autowired
+    private Environment env;
+
+    @Value("${key.something}")
+    private String injectedProperty;
+
+    public ComponentUsingProperties() {
+        super();
+    }
+
+    //
+
+    @Override
+    public void afterPropertiesSet() throws Exception {
+        System.out.println("in afterPropertiesSet via @Value: " + injectedProperty);
+        System.out.println("in afterPropertiesSet Environment: " + env.getProperty("key.something"));
+    }
+
+}

spring-boot-modules/spring-boot-properties/src/main/java/com/baeldung/properties/external/ExternalPropertiesWithJavaConfig.java

@@ -0,0 +1,25 @@
+package com.baeldung.properties.external;
+
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.ComponentScan;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.context.annotation.PropertySource;
+import org.springframework.context.support.PropertySourcesPlaceholderConfigurer;
+
+@Configuration
+@ComponentScan("org.baeldung.properties.core")
+@PropertySource("classpath:foo.properties")
+public class ExternalPropertiesWithJavaConfig {
+
+    public ExternalPropertiesWithJavaConfig() {
+        super();
+    }
+
+    // beans
+
+    @Bean
+    public static PropertySourcesPlaceholderConfigurer propertySourcesPlaceholderConfigurer() {
+        return new PropertySourcesPlaceholderConfigurer();
+    }
+
+}

spring-boot-modules/spring-boot-properties/src/main/java/com/baeldung/properties/external/ExternalPropertiesWithXmlConfig.java

@@ -0,0 +1,16 @@
+package com.baeldung.properties.external;
+
+import org.springframework.context.annotation.ComponentScan;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.context.annotation.ImportResource;
+
+@Configuration
+@ImportResource("classpath:configForProperties.xml")
+@ComponentScan("org.baeldung.core")
+public class ExternalPropertiesWithXmlConfig {
+
+    public ExternalPropertiesWithXmlConfig() {
+        super();
+    }
+
+}

spring-boot-modules/spring-boot-properties/src/main/java/com/baeldung/properties/external/ExternalPropertiesWithXmlConfigOne.java

@@ -0,0 +1,16 @@
+package com.baeldung.properties.external;
+
+import org.springframework.context.annotation.ComponentScan;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.context.annotation.ImportResource;
+
+@Configuration
+@ImportResource("classpath:configForPropertiesOne.xml")
+@ComponentScan("org.baeldung.core")
+public class ExternalPropertiesWithXmlConfigOne {
+
+    public ExternalPropertiesWithXmlConfigOne() {
+        super();
+    }
+
+}

spring-boot-modules/spring-boot-properties/src/main/java/com/baeldung/properties/external/ExternalPropertiesWithXmlConfigTwo.java

@@ -0,0 +1,14 @@
+package com.baeldung.properties.external;
+
+import org.springframework.context.annotation.Configuration;
+import org.springframework.context.annotation.ImportResource;
+
+@Configuration
+@ImportResource("classpath:basicConfigForPropertiesTwo.xml")
+public class ExternalPropertiesWithXmlConfigTwo {
+
+    public ExternalPropertiesWithXmlConfigTwo() {
+        super();
+    }
+
+}

spring-boot-modules/spring-boot-properties/src/main/java/com/baeldung/properties/reloading/SpringBootPropertiesApplication.java

@@ -0,0 +1,44 @@
+package com.baeldung.properties.reloading;
+
+import com.baeldung.properties.reloading.configs.ReloadableProperties;
+import java.io.File;
+import java.util.Properties;
+import org.apache.commons.configuration.PropertiesConfiguration;
+import org.apache.commons.configuration.reloading.FileChangedReloadingStrategy;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnBean;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Primary;
+
+@SpringBootApplication
+public class SpringBootPropertiesApplication {
+
+    @Bean
+    @ConditionalOnProperty(name = "spring.config.location", matchIfMissing = false)
+    public PropertiesConfiguration propertiesConfiguration(
+      @Value("${spring.config.location}") String path,
+      @Value("${spring.properties.refreshDelay}") long refreshDelay) throws Exception {
+        String filePath = path.substring("file:".length());
+        PropertiesConfiguration configuration = new PropertiesConfiguration(new File(filePath).getCanonicalPath());
+        FileChangedReloadingStrategy fileChangedReloadingStrategy = new FileChangedReloadingStrategy();
+        fileChangedReloadingStrategy.setRefreshDelay(refreshDelay);
+        configuration.setReloadingStrategy(fileChangedReloadingStrategy);
+        return configuration;
+    }
+
+    @Bean
+    @ConditionalOnBean(PropertiesConfiguration.class)
+    @Primary
+    public Properties properties(PropertiesConfiguration propertiesConfiguration) throws Exception {
+        ReloadableProperties properties = new ReloadableProperties(propertiesConfiguration);
+        return properties;
+    }
+
+    public static void main(String[] args) {
+        SpringApplication.run(SpringBootPropertiesApplication.class, args);
+    }
+
+}

spring-boot-modules/spring-boot-properties/src/main/java/com/baeldung/properties/reloading/configs/PropertiesException.java

@@ -0,0 +1,10 @@
+package com.baeldung.properties.reloading.configs;
+
+public class PropertiesException extends RuntimeException {
+    public PropertiesException() {
+    }
+
+    public PropertiesException(Throwable cause) {
+        super(cause);
+    }
+}

spring-boot-modules/spring-boot-properties/src/main/java/com/baeldung/properties/reloading/configs/ReloadableProperties.java

@@ -0,0 +1,49 @@
+package com.baeldung.properties.reloading.configs;
+
+import java.io.FileReader;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.Reader;
+import java.util.Properties;
+import javax.naming.OperationNotSupportedException;
+import org.apache.commons.configuration.PropertiesConfiguration;
+
+public class ReloadableProperties extends Properties {
+    private PropertiesConfiguration propertiesConfiguration;
+
+    public ReloadableProperties(PropertiesConfiguration propertiesConfiguration) throws IOException {
+        super.load(new FileReader(propertiesConfiguration.getFile()));
+        this.propertiesConfiguration = propertiesConfiguration;
+    }
+
+    @Override
+    public synchronized Object setProperty(String key, String value) {
+        propertiesConfiguration.setProperty(key, value);
+        return super.setProperty(key, value);
+    }
+
+    @Override
+    public String getProperty(String key) {
+        String val = propertiesConfiguration.getString(key);
+        super.setProperty(key, val);
+        return val;
+    }
+
+    @Override
+    public String getProperty(String key, String defaultValue) {
+        String val = propertiesConfiguration.getString(key, defaultValue);
+        super.setProperty(key, val);
+        return val;
+    }
+
+    @Override
+    public synchronized void load(Reader reader) throws IOException {
+        throw new PropertiesException(new OperationNotSupportedException());
+    }
+
+    @Override
+    public synchronized void load(InputStream inStream) throws IOException {
+        throw new PropertiesException(new OperationNotSupportedException());
+    }
+
+}

spring-boot-modules/spring-boot-properties/src/main/java/com/baeldung/properties/reloading/configs/ReloadablePropertySource.java

@@ -0,0 +1,33 @@
+package com.baeldung.properties.reloading.configs;
+
+import org.apache.commons.configuration.PropertiesConfiguration;
+import org.apache.commons.configuration.reloading.FileChangedReloadingStrategy;
+import org.springframework.core.env.PropertySource;
+import org.springframework.util.StringUtils;
+
+public class ReloadablePropertySource extends PropertySource {
+
+    PropertiesConfiguration propertiesConfiguration;
+
+    public ReloadablePropertySource(String name, PropertiesConfiguration propertiesConfiguration) {
+        super(name);
+        this.propertiesConfiguration = propertiesConfiguration;
+    }
+
+    public ReloadablePropertySource(String name, String path) {
+        super(StringUtils.isEmpty(name) ? path : name);
+        try {
+            this.propertiesConfiguration = new PropertiesConfiguration(path);
+            FileChangedReloadingStrategy strategy = new FileChangedReloadingStrategy();
+            strategy.setRefreshDelay(1000);
+            this.propertiesConfiguration.setReloadingStrategy(strategy);
+        } catch (Exception e) {
+            throw new PropertiesException(e);
+        }
+    }
+
+    @Override
+    public Object getProperty(String s) {
+        return propertiesConfiguration.getProperty(s);
+    }
+}

spring-boot-modules/spring-boot-properties/src/main/java/com/baeldung/properties/reloading/configs/ReloadablePropertySourceConfig.java

@@ -0,0 +1,29 @@
+package com.baeldung.properties.reloading.configs;
+
+import org.apache.commons.configuration.PropertiesConfiguration;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.core.env.ConfigurableEnvironment;
+import org.springframework.core.env.MutablePropertySources;
+
+@Configuration
+public class ReloadablePropertySourceConfig {
+
+    private ConfigurableEnvironment env;
+
+    public ReloadablePropertySourceConfig(@Autowired ConfigurableEnvironment env) {
+        this.env = env;
+    }
+
+    @Bean
+    @ConditionalOnProperty(name = "spring.config.location", matchIfMissing = false)
+    public ReloadablePropertySource reloadablePropertySource(PropertiesConfiguration properties) {
+        ReloadablePropertySource ret = new ReloadablePropertySource("dynamic", properties);
+        MutablePropertySources sources = env.getPropertySources();
+        sources.addFirst(ret);
+        return ret;
+    }
+
+}

spring-boot-modules/spring-boot-properties/src/main/java/com/baeldung/properties/reloading/configs/ReloadablePropertySourceFactory.java

@@ -0,0 +1,25 @@
+package com.baeldung.properties.reloading.configs;
+
+import java.io.IOException;
+import org.springframework.core.env.PropertySource;
+import org.springframework.core.io.FileSystemResource;
+import org.springframework.core.io.FileUrlResource;
+import org.springframework.core.io.Resource;
+import org.springframework.core.io.support.DefaultPropertySourceFactory;
+import org.springframework.core.io.support.EncodedResource;
+
+public class ReloadablePropertySourceFactory extends DefaultPropertySourceFactory {
+    @Override
+    public PropertySource<?> createPropertySource(String s, EncodedResource encodedResource) throws IOException {
+        Resource internal = encodedResource.getResource();
+        if (internal instanceof FileSystemResource) {
+            return new ReloadablePropertySource(s, ((FileSystemResource) internal).getPath());
+        }
+        if (internal instanceof FileUrlResource) {
+            return new ReloadablePropertySource(s, ((FileUrlResource) internal)
+              .getURL()
+              .getPath());
+        }
+        return super.createPropertySource(s, encodedResource);
+    }
+}

spring-boot-modules/spring-boot-properties/src/main/java/com/baeldung/properties/spring/BasicPropertiesWithJavaConfig.java

@@ -0,0 +1,14 @@
+package com.baeldung.properties.spring;
+
+import org.springframework.context.annotation.Configuration;
+import org.springframework.context.annotation.PropertySource;
+
+@Configuration
+@PropertySource("classpath:foo.properties")
+public class BasicPropertiesWithJavaConfig {
+
+    public BasicPropertiesWithJavaConfig() {
+        super();
+    }
+
+}

spring-boot-modules/spring-boot-properties/src/main/java/com/baeldung/properties/spring/PropertiesWithJavaConfig.java

@@ -0,0 +1,24 @@
+package com.baeldung.properties.spring;
+
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.context.annotation.PropertySource;
+import org.springframework.context.support.PropertySourcesPlaceholderConfigurer;
+
+@Configuration
+@PropertySource("classpath:foo.properties")
+@PropertySource("classpath:bar.properties")
+public class PropertiesWithJavaConfig {
+
+    public PropertiesWithJavaConfig() {
+        super();
+    }
+
+    // beans
+
+    @Bean
+    public static PropertySourcesPlaceholderConfigurer propertySourcesPlaceholderConfigurer() {
+        return new PropertySourcesPlaceholderConfigurer();
+    }
+
+}

spring-boot-modules/spring-boot-properties/src/main/java/com/baeldung/properties/spring/PropertiesWithJavaConfigOther.java

@@ -0,0 +1,16 @@
+package com.baeldung.properties.spring;
+
+import org.springframework.context.annotation.Configuration;
+import org.springframework.context.annotation.PropertySource;
+
+@Configuration
+@PropertySource("classpath:bar.properties")
+public class PropertiesWithJavaConfigOther {
+
+    public PropertiesWithJavaConfigOther() {
+        super();
+    }
+
+    // beans
+
+}

spring-boot-modules/spring-boot-properties/src/main/java/com/baeldung/properties/spring/PropertiesWithPlaceHolderConfigurer.java

@@ -0,0 +1,21 @@
+package com.baeldung.properties.spring;
+
+import org.springframework.beans.factory.config.PropertyPlaceholderConfigurer;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+
+@Configuration
+public class PropertiesWithPlaceHolderConfigurer {
+
+    public PropertiesWithPlaceHolderConfigurer() {
+        super();
+    }
+
+    @Bean
+    public PropertyPlaceholderConfigurer propertyConfigurer() {
+        final PropertyPlaceholderConfigurer props = new PropertyPlaceholderConfigurer();
+        props.setSystemPropertiesMode(PropertyPlaceholderConfigurer.SYSTEM_PROPERTIES_MODE_FALLBACK);
+        return props;
+    }
+
+}

spring-boot-modules/spring-boot-properties/src/main/java/com/baeldung/value/ClassNotManagedBySpring.java

@@ -0,0 +1,28 @@
+package com.baeldung.value;
+
+public class ClassNotManagedBySpring {
+
+    private String customVariable;
+    private String anotherCustomVariable;
+
+    public ClassNotManagedBySpring(String someInitialValue, String anotherManagedValue) {
+        this.customVariable = someInitialValue;
+        this.anotherCustomVariable = anotherManagedValue;
+    }
+
+    public String getCustomVariable() {
+        return customVariable;
+    }
+
+    public void setCustomVariable(String customVariable) {
+        this.customVariable = customVariable;
+    }
+
+    public String getAnotherCustomVariable() {
+        return anotherCustomVariable;
+    }
+
+    public void setAnotherCustomVariable(String anotherCustomVariable) {
+        this.anotherCustomVariable = anotherCustomVariable;
+    }
+}

spring-boot-modules/spring-boot-properties/src/main/java/com/baeldung/value/InitializerBean.java

@@ -0,0 +1,21 @@
+package com.baeldung.value;
+
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.stereotype.Component;
+
+@Component
+public class InitializerBean {
+
+    private String someInitialValue;
+    private String anotherManagedValue;
+
+    public InitializerBean(@Value("someInitialValue") String someInitialValue, @Value("anotherValue") String anotherManagedValue) {
+        this.someInitialValue = someInitialValue;
+        this.anotherManagedValue = anotherManagedValue;
+    }
+
+    public ClassNotManagedBySpring initClass() {
+        return new ClassNotManagedBySpring(this.someInitialValue, this.anotherManagedValue);
+    }
+
+}

spring-boot-modules/spring-boot-properties/src/main/java/com/baeldung/value/SomeBean.java

@@ -0,0 +1,17 @@
+package com.baeldung.value;
+
+public class SomeBean {
+    private int someValue;
+
+    public SomeBean(int someValue) {
+        this.someValue = someValue;
+    }
+
+    public int getSomeValue() {
+        return someValue;
+    }
+
+    public void setSomeValue(int someValue) {
+        this.someValue = someValue;
+    }
+}

spring-boot-modules/spring-boot-properties/src/main/java/com/baeldung/value/ValuesApp.java

@@ -0,0 +1,102 @@
+package com.baeldung.value;
+
+import java.util.Arrays;
+import java.util.List;
+import java.util.Map;
+
+import javax.annotation.PostConstruct;
+
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.context.ApplicationContext;
+import org.springframework.context.annotation.AnnotationConfigApplicationContext;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.context.annotation.PropertySource;
+
+@Configuration
+@PropertySource(name = "myProperties", value = "values.properties")
+public class ValuesApp {
+
+    @Value("string value")
+    private String stringValue;
+
+    @Value("${value.from.file}")
+    private String valueFromFile;
+
+    @Value("${systemValue}")
+    private String systemValue;
+
+    @Value("${unknown_param:some default}")
+    private String someDefault;
+
+    @Value("${priority}")
+    private String prioritySystemProperty;
+
+    @Value("${listOfValues}")
+    private String[] valuesArray;
+
+    @Value("#{systemProperties['priority']}")
+    private String spelValue;
+
+    @Value("#{systemProperties['unknown'] ?: 'some default'}")
+    private String spelSomeDefault;
+
+    @Value("#{someBean.someValue}")
+    private Integer someBeanValue;
+
+    @Value("#{'${listOfValues}'.split(',')}")
+    private List<String> valuesList;
+	
+    @Value("#{${valuesMap}}")
+    private Map<String, Integer> valuesMap;
+
+    @Value("#{${valuesMap}.key1}")
+    private Integer valuesMapKey1;
+
+    @Value("#{${valuesMap}['unknownKey']}")
+    private Integer unknownMapKey;
+
+    @Value("#{${unknownMap : {key1:'1', key2 : '2'}}}")
+    private Map<String, Integer> unknownMap;
+
+    @Value("#{${valuesMap}['unknownKey'] ?: 5}")
+    private Integer unknownMapKeyWithDefaultValue;
+
+    @Value("#{${valuesMap}.?[value>'1']}")
+    private Map<String, Integer> valuesMapFiltered;
+
+    @Value("#{systemProperties}")
+    private Map<String, String> systemPropertiesMap;
+
+    public static void main(String[] args) {
+        System.setProperty("systemValue", "Some system parameter value");
+        System.setProperty("priority", "System property");
+        ApplicationContext applicationContext = new AnnotationConfigApplicationContext(ValuesApp.class);
+    }
+
+    @Bean
+    public SomeBean someBean() {
+        return new SomeBean(10);
+    }
+
+    @PostConstruct
+    public void afterInitialize() {
+        System.out.println(stringValue);
+        System.out.println(valueFromFile);
+        System.out.println(systemValue);
+        System.out.println(someDefault);
+        System.out.println(prioritySystemProperty);
+        System.out.println(Arrays.toString(valuesArray));
+        System.out.println(spelValue);
+        System.out.println(spelSomeDefault);
+        System.out.println(someBeanValue);
+        System.out.println(valuesList);
+        System.out.println(valuesMap);
+        System.out.println(valuesMapKey1);
+        System.out.println(unknownMapKey);
+        System.out.println(unknownMap);
+        System.out.println(unknownMapKeyWithDefaultValue);
+        System.out.println(valuesMapFiltered);
+        System.out.println(systemPropertiesMap);
+    }
+}

spring-boot-modules/spring-boot-properties/src/main/java/com/baeldung/valuewithdefaults/ValuesWithDefaultsApp.java

@@ -0,0 +1,75 @@
+package com.baeldung.valuewithdefaults;
+
+import java.util.Arrays;
+import java.util.List;
+
+import javax.annotation.PostConstruct;
+
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.context.ApplicationContext;
+import org.springframework.context.annotation.AnnotationConfigApplicationContext;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.context.annotation.PropertySource;
+import org.springframework.util.Assert;
+
+import com.google.common.collect.Lists;
+import com.google.common.primitives.Ints;
+
+/**
+ * Demonstrates setting defaults for @Value annotation.  Note that there are no properties 
+ * defined in the specified property source.  We also assume that the user here
+ * does not have a system property named some.key.
+ *
+ */
+@Configuration
+@PropertySource(name = "myProperties", value = "valueswithdefaults.properties")
+public class ValuesWithDefaultsApp {
+
+    @Value("${some.key:my default value}")
+    private String stringWithDefaultValue;
+
+    @Value("${some.key:}")
+    private String stringWithBlankDefaultValue;
+
+    @Value("${some.key:true}")
+    private boolean booleanWithDefaultValue;
+    
+    @Value("${some.key:42}")
+    private int intWithDefaultValue;  
+
+    @Value("${some.key:one,two,three}")
+    private String[] stringArrayWithDefaults;
+
+    @Value("${some.key:1,2,3}")
+    private int[] intArrayWithDefaults;
+
+    @Value("#{systemProperties['some.key'] ?: 'my default system property value'}")
+    private String spelWithDefaultValue;
+    
+
+    public static void main(String[] args) {
+        ApplicationContext applicationContext = new AnnotationConfigApplicationContext(ValuesWithDefaultsApp.class);
+    }
+
+    @PostConstruct
+    public void afterInitialize() {
+    	// strings
+    	Assert.isTrue(stringWithDefaultValue.equals("my default value"));
+    	Assert.isTrue(stringWithBlankDefaultValue.equals(""));
+    	
+    	// other primitives
+    	Assert.isTrue(booleanWithDefaultValue);
+    	Assert.isTrue(intWithDefaultValue == 42);
+    	
+    	// arrays
+    	List<String> stringListValues = Lists.newArrayList("one", "two", "three");
+    	Assert.isTrue(Arrays.asList(stringArrayWithDefaults).containsAll(stringListValues));
+
+    	List<Integer> intListValues = Lists.newArrayList(1, 2, 3);
+    	Assert.isTrue(Ints.asList(intArrayWithDefaults).containsAll(intListValues));
+
+    	// SpEL
+    	Assert.isTrue(spelWithDefaultValue.equals("my default system property value"));
+    	
+    }
+}

spring-boot-modules/spring-boot-properties/src/main/java/com/baeldung/yaml/MyApplication.java

@@ -0,0 +1,31 @@
+/*
+ * To change this license header, choose License Headers in Project Properties.
+ * To change this template file, choose Tools | Templates
+ * and open the template in the editor.
+ */
+package com.baeldung.yaml;
+
+import java.util.Collections;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.CommandLineRunner;
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class MyApplication implements CommandLineRunner {
+
+    @Autowired
+    private YAMLConfig myConfig;
+
+    public static void main(String[] args) {
+        SpringApplication app = new SpringApplication(MyApplication.class);
+        app.run();
+    }
+
+    public void run(String... args) throws Exception {
+        System.out.println("using environment:" + myConfig.getEnvironment());
+        System.out.println("name:" + myConfig.getName());
+        System.out.println("servers:" + myConfig.getServers());
+    }
+
+}

spring-boot-modules/spring-boot-properties/src/main/java/com/baeldung/yaml/YAMLConfig.java

@@ -0,0 +1,41 @@
+package com.baeldung.yaml;
+
+import java.util.ArrayList;
+import java.util.List;
+import org.springframework.boot.context.properties.ConfigurationProperties;
+import org.springframework.boot.context.properties.EnableConfigurationProperties;
+import org.springframework.context.annotation.Configuration;
+
+@Configuration
+@EnableConfigurationProperties
+@ConfigurationProperties
+public class YAMLConfig {
+    private String name;
+    private String environment;
+    private List<String> servers = new ArrayList<String>();
+
+    public List<String> getServers() {
+        return servers;
+    }
+
+    public void setServers(List<String> servers) {
+        this.servers = servers;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public String getEnvironment() {
+        return environment;
+    }
+
+    public void setEnvironment(String environment) {
+        this.environment = environment;
+    }
+
+}

spring-boot-modules/spring-boot-properties/src/main/resources/application.properties

@@ -0,0 +1,4 @@
+management.endpoints.web.exposure.include=refresh
+spring.properties.refreshDelay=1000
+spring.config.location=file:extra.properties
+spring.main.allow-bean-definition-overriding=true

spring-boot-modules/spring-boot-properties/src/main/resources/application.yml

@@ -0,0 +1,17 @@
+spring:
+    profiles: test
+name: test-YAML
+environment: test
+servers:
+    - www.abc.test.com
+    - www.xyz.test.com
+    
+---
+
+spring:
+    profiles: prod
+name: prod-YAML
+environment: production
+servers:
+    - www.abc.com
+    - www.xyz.com

spring-boot-modules/spring-boot-properties/src/main/resources/bar.properties

@@ -0,0 +1 @@
+key.something2=val2

spring-boot-modules/spring-boot-properties/src/main/resources/basicConfigForProperties.xml

@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context"
+    xmlns:util="http://www.springframework.org/schema/util"
+    xsi:schemaLocation="
+      http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.2.xsd
+      http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-4.2.xsd
+      http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.2.xsd"
+>
+
+    <context:property-placeholder location="classpath:foo.properties"/>
+
+</beans>

spring-boot-modules/spring-boot-properties/src/main/resources/basicConfigForPropertiesOne.xml

@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context"
+    xmlns:util="http://www.springframework.org/schema/util"
+    xsi:schemaLocation="
+      http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.2.xsd
+      http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-4.2.xsd
+      http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.2.xsd"
+>
+
+    <context:property-placeholder location="classpath:foo.properties" ignore-unresolvable="true" order="1"/>
+
+</beans>

spring-boot-modules/spring-boot-properties/src/main/resources/basicConfigForPropertiesTwo.xml

@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<beans xmlns="http://www.springframework.org/schema/beans"
+	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context"
+	xmlns:util="http://www.springframework.org/schema/util"
+	xsi:schemaLocation="
+      http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.2.xsd
+      http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-4.2.xsd
+      http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.2.xsd">
+
+	<context:property-placeholder location="classpath:bar.properties"
+		order="2" />
+
+</beans>

spring-boot-modules/spring-boot-properties/src/main/resources/child.properties

@@ -0,0 +1 @@
+child.name=child

spring-boot-modules/spring-boot-properties/src/main/resources/configForProperties.xml

@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context"
+    xmlns:util="http://www.springframework.org/schema/util"
+    xsi:schemaLocation="
+      http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.2.xsd
+      http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-4.2.xsd
+      http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.2.xsd"
+>
+
+    <context:property-placeholder location="classpath:foo.properties,classpath:bar.properties"/>
+
+    <bean id="componentInXmlUsingProperties" class="com.baeldung.properties.core.ComponentInXmlUsingProperties">
+        <constructor-arg value="${key.something}"/>
+    </bean>
+
+</beans>

spring-boot-modules/spring-boot-properties/src/main/resources/configForPropertiesOne.xml

@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context"
+    xmlns:util="http://www.springframework.org/schema/util"
+    xsi:schemaLocation="
+      http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.2.xsd
+      http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-4.2.xsd
+      http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.2.xsd"
+>
+
+    <context:property-placeholder location="classpath:foo.properties" ignore-unresolvable="true" order="1"/>
+
+    <bean id="componentInXmlUsingProperties" class="com.baeldung.properties.core.ComponentInXmlUsingProperties">
+        <constructor-arg value="${key.something2}"/>
+    </bean>
+
+</beans>

spring-boot-modules/spring-boot-properties/src/main/resources/configprops.json

@@ -0,0 +1,10 @@
+{
+  "host" : "mailer@mail.com",
+  "port" : 9090,
+  "resend" : true,
+  "topics" : ["spring", "boot"],
+  "sender" : {
+    "name": "sender",
+    "address": "street"
+  }
+}

spring-boot-modules/spring-boot-properties/src/main/resources/configprops.properties

@@ -0,0 +1,27 @@
+#Simple properties
+mail.hostname=host@mail.com
+mail.port=9000
+mail.from=mailer@mail.com
+
+#List properties
+mail.defaultRecipients[0]=admin@mail.com
+mail.defaultRecipients[1]=owner@mail.com
+
+#Map Properties
+mail.additionalHeaders.redelivery=true
+mail.additionalHeaders.secure=true
+mail.additionalHeaders.p3=value
+
+#Object properties
+mail.credentials.username=john
+mail.credentials.password=password
+mail.credentials.authMethod=SHA1
+
+#Bean method properties
+item.name=Item name
+item.size=42
+
+
+#Additional properties
+additional.unit=km
+additional.max=100

spring-boot-modules/spring-boot-properties/src/main/resources/conversion.properties

@@ -0,0 +1,2 @@
+conversion.timeInDefaultUnit=10
+conversion.timeInNano=9ns

spring-boot-modules/spring-boot-properties/src/main/resources/foo.properties

@@ -0,0 +1 @@
+key.something=val

spring-boot-modules/spring-boot-properties/src/main/resources/parent.properties

@@ -0,0 +1 @@
+parent.name=parent

spring-boot-modules/spring-boot-properties/src/main/resources/values.properties

@@ -0,0 +1,4 @@
+value.from.file=Value got from the file
+priority=Properties file
+listOfValues=A,B,C
+valuesMap={key1:'1', key2 : '2', key3 : '3'}