JAVA-66: New module spring-data-jpa-repo

2020-07-19 14:31:28 +05:30
parent 52da4c8ee8
commit 733d901d46
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+## Spring Data JPA - Repo
+
+This module contains articles about repositories in Spring Data JPA 
+
+### Relevant Articles: 
+- [Case Insensitive Queries with Spring Data Repository](https://www.baeldung.com/spring-data-case-insensitive-queries)
+- [Derived Query Methods in Spring Data JPA Repositories](https://www.baeldung.com/spring-data-derived-queries)
+- [LIKE Queries in Spring JPA Repositories](https://www.baeldung.com/spring-jpa-like-queries)
+- [Spring Data – CrudRepository save() Method](https://www.baeldung.com/spring-data-crud-repository-save)
+- [Spring Data JPA – Adding a Method in All Repositories](https://www.baeldung.com/spring-data-jpa-method-in-all-repositories)
+- [Spring Data Composable Repositories](https://www.baeldung.com/spring-data-composable-repositories)
+- [Spring Data JPA Repository Populators](https://www.baeldung.com/spring-data-jpa-repository-populators)
+- [Calling Stored Procedures from Spring Data JPA Repositories](https://www.baeldung.com/spring-data-jpa-stored-procedures)
+
+### Eclipse Config 
+After importing the project into Eclipse, you may see the following error:  
+"No persistence xml file found in project"
+
+This can be ignored: 
+- Project -> Properties -> Java Persistance -> JPA -> Error/Warnings -> Select Ignore on "No persistence xml file found in project"
+Or: 
+- Eclipse -> Preferences - Validation - disable the "Build" execution of the JPA Validator 
@@ -0,0 +1,52 @@
+<?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-data-jpa-repo</artifactId>
+    <name>spring-data-jpa-repo</name>
+
+    <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-web</artifactId>
+        </dependency>
+
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-data-jpa</artifactId>
+        </dependency>
+
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-data-jdbc</artifactId>
+        </dependency>
+
+        <dependency>
+            <groupId>mysql</groupId>
+            <artifactId>mysql-connector-java</artifactId>
+        </dependency>
+
+        <dependency>
+            <groupId>org.postgresql</groupId>
+            <artifactId>postgresql</artifactId>
+        </dependency>
+
+        <dependency>
+            <groupId>com.h2database</groupId>
+            <artifactId>h2</artifactId>
+        </dependency>
+        
+        <dependency>
+            <groupId>org.springframework</groupId>
+            <artifactId>spring-oxm</artifactId>
+        </dependency>
+    </dependencies>
+
+</project>
@@ -0,0 +1,17 @@
+package com.baeldung;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.data.jpa.repository.config.EnableJpaRepositories;
+
+import com.baeldung.boot.daos.impl.ExtendedRepositoryImpl;
+
+@SpringBootApplication
+@EnableJpaRepositories(repositoryBaseClass = ExtendedRepositoryImpl.class)
+public class Application {
+
+    public static void main(String[] args) {
+        SpringApplication.run(Application.class, args);
+    }
+
+}
@@ -0,0 +1,16 @@
+package com.baeldung.boot.daos;
+
+import org.springframework.stereotype.Repository;
+
+import com.baeldung.boot.domain.Item;
+
+@Repository
+public interface CustomItemRepository {
+
+    void deleteCustom(Item entity);
+
+    Item findItemById(Long id);
+
+    void findThenDelete(Long id);
+
+}
@@ -0,0 +1,13 @@
+package com.baeldung.boot.daos;
+
+import org.springframework.stereotype.Repository;
+
+import com.baeldung.boot.domain.ItemType;
+
+@Repository
+public interface CustomItemTypeRepository {
+
+    void deleteCustom(ItemType entity);
+
+    void findThenDelete(Long id);
+}
@@ -0,0 +1,14 @@
+package com.baeldung.boot.daos;
+
+import java.io.Serializable;
+import java.util.List;
+
+import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.data.repository.NoRepositoryBean;
+
+@NoRepositoryBean
+public interface ExtendedRepository<T, ID extends Serializable> extends JpaRepository<T, ID> {
+
+    List<T> findByAttributeContainsText(String attributeName, String text);
+
+}
@@ -0,0 +1,6 @@
+package com.baeldung.boot.daos;
+
+import com.baeldung.boot.domain.Student;
+
+public interface ExtendedStudentRepository extends ExtendedRepository<Student, Long> {
+}
@@ -0,0 +1,8 @@
+package com.baeldung.boot.daos;
+
+import org.springframework.data.repository.CrudRepository;
+
+import com.baeldung.boot.domain.MerchandiseEntity;
+
+public interface InventoryRepository extends CrudRepository<MerchandiseEntity, Long> {
+}
@@ -0,0 +1,10 @@
+package com.baeldung.boot.daos;
+
+import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.stereotype.Repository;
+
+import com.baeldung.boot.domain.ItemType;
+
+@Repository
+public interface ItemTypeRepository extends JpaRepository<ItemType, Long>, CustomItemTypeRepository, CustomItemRepository {
+}
@@ -0,0 +1,10 @@
+package com.baeldung.boot.daos;
+
+import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.stereotype.Repository;
+
+import com.baeldung.boot.domain.Location;
+
+@Repository
+public interface LocationRepository extends JpaRepository<Location, Long> {
+}
@@ -0,0 +1,15 @@
+package com.baeldung.boot.daos;
+
+import java.util.Optional;
+
+import org.springframework.data.repository.Repository;
+
+import com.baeldung.boot.domain.Location;
+
+@org.springframework.stereotype.Repository
+public interface ReadOnlyLocationRepository extends Repository<Location, Long> {
+
+    Optional<Location> findById(Long id);
+
+    Location save(Location location);
+}
@@ -0,0 +1,13 @@
+package com.baeldung.boot.daos;
+
+import java.util.List;
+
+import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.stereotype.Repository;
+
+import com.baeldung.boot.domain.Store;
+
+@Repository
+public interface StoreRepository extends JpaRepository<Store, Long> {
+    List<Store> findStoreByLocationId(Long locationId);
+}
@@ -0,0 +1,33 @@
+package com.baeldung.boot.daos.impl;
+
+import javax.persistence.EntityManager;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Repository;
+
+import com.baeldung.boot.daos.CustomItemRepository;
+import com.baeldung.boot.domain.Item;
+
+@Repository
+public class CustomItemRepositoryImpl implements CustomItemRepository {
+
+    @Autowired
+    private EntityManager entityManager;
+
+    @Override
+    public void deleteCustom(Item item) {
+        entityManager.remove(item);
+    }
+
+    @Override
+    public Item findItemById(Long id) {
+        return entityManager.find(Item.class, id);
+    }
+
+    @Override
+    public void findThenDelete(Long id) {
+        final Item item = entityManager.find(Item.class, id);
+        entityManager.remove(item);
+    }
+
+}
@@ -0,0 +1,27 @@
+package com.baeldung.boot.daos.impl;
+
+import javax.persistence.EntityManager;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Repository;
+
+import com.baeldung.boot.daos.CustomItemTypeRepository;
+import com.baeldung.boot.domain.ItemType;
+
+@Repository
+public class CustomItemTypeRepositoryImpl implements CustomItemTypeRepository {
+
+    @Autowired
+    private EntityManager entityManager;
+
+    @Override
+    public void deleteCustom(ItemType itemType) {
+        entityManager.remove(itemType);
+    }
+
+    @Override
+    public void findThenDelete(Long id) {
+        ItemType itemTypeToDelete = entityManager.find(ItemType.class, id);
+        entityManager.remove(itemTypeToDelete);
+    }
+}
@@ -0,0 +1,37 @@
+package com.baeldung.boot.daos.impl;
+
+import java.io.Serializable;
+import java.util.List;
+
+import javax.persistence.EntityManager;
+import javax.persistence.TypedQuery;
+import javax.persistence.criteria.CriteriaBuilder;
+import javax.persistence.criteria.CriteriaQuery;
+import javax.persistence.criteria.Root;
+import javax.transaction.Transactional;
+
+import org.springframework.data.jpa.repository.support.JpaEntityInformation;
+import org.springframework.data.jpa.repository.support.SimpleJpaRepository;
+
+import com.baeldung.boot.daos.ExtendedRepository;
+
+public class ExtendedRepositoryImpl<T, ID extends Serializable> extends SimpleJpaRepository<T, ID> implements ExtendedRepository<T, ID> {
+
+    private EntityManager entityManager;
+
+    public ExtendedRepositoryImpl(JpaEntityInformation<T, ?> entityInformation, EntityManager entityManager) {
+        super(entityInformation, entityManager);
+        this.entityManager = entityManager;
+    }
+
+    @Transactional
+    public List<T> findByAttributeContainsText(String attributeName, String text) {
+        CriteriaBuilder builder = entityManager.getCriteriaBuilder();
+        CriteriaQuery<T> query = builder.createQuery(getDomainClass());
+        Root<T> root = query.from(getDomainClass());
+        query.select(root).where(builder.like(root.<String> get(attributeName), "%" + text + "%"));
+        TypedQuery<T> q = entityManager.createQuery(query);
+        return q.getResultList();
+    }
+
+}
@@ -0,0 +1,81 @@
+package com.baeldung.boot.domain;
+
+import java.math.BigDecimal;
+
+import javax.persistence.Entity;
+import javax.persistence.Id;
+import javax.persistence.ManyToOne;
+
+@Entity
+public class Item {
+
+    private String color;
+    private String grade;
+
+    @Id
+    private Long id;
+
+    @ManyToOne
+    private ItemType itemType;
+
+    private String name;
+    private BigDecimal price;
+    @ManyToOne
+    private Store store;
+
+    public String getColor() {
+        return color;
+    }
+
+    public String getGrade() {
+        return grade;
+    }
+
+    public Long getId() {
+        return id;
+    }
+
+    public ItemType getItemType() {
+        return itemType;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public BigDecimal getPrice() {
+        return price;
+    }
+
+    public Store getStore() {
+        return store;
+    }
+
+    public void setColor(String color) {
+        this.color = color;
+    }
+
+    public void setGrade(String grade) {
+        this.grade = grade;
+    }
+
+    public void setId(Long id) {
+        this.id = id;
+    }
+
+    public void setItemType(ItemType itemType) {
+        this.itemType = itemType;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public void setPrice(BigDecimal price) {
+        this.price = price;
+    }
+
+    public void setStore(Store store) {
+        this.store = store;
+    }
+}
@@ -0,0 +1,46 @@
+package com.baeldung.boot.domain;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import javax.persistence.CascadeType;
+import javax.persistence.Entity;
+import javax.persistence.Id;
+import javax.persistence.JoinColumn;
+import javax.persistence.OneToMany;
+
+@Entity
+public class ItemType {
+
+    @Id
+    private Long id;
+    @OneToMany(cascade = CascadeType.ALL)
+    @JoinColumn(name = "ITEM_TYPE_ID")
+    private List<Item> items = new ArrayList<>();
+
+    private String name;
+
+    public Long getId() {
+        return id;
+    }
+
+    public List<Item> getItems() {
+        return items;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setId(Long id) {
+        this.id = id;
+    }
+
+    public void setItems(List<Item> items) {
+        this.items = items;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+}
@@ -0,0 +1,34 @@
+package com.baeldung.boot.domain;
+
+import javax.persistence.Embeddable;
+
+@Embeddable
+public class KVTag {
+    private String key;
+    private String value;
+
+    public KVTag() {
+    }
+
+    public KVTag(String key, String value) {
+        super();
+        this.key = key;
+        this.value = value;
+    }
+
+    public String getKey() {
+        return key;
+    }
+
+    public void setKey(String key) {
+        this.key = key;
+    }
+
+    public String getValue() {
+        return value;
+    }
+
+    public void setValue(String value) {
+        this.value = value;
+    }
+}
@@ -0,0 +1,55 @@
+package com.baeldung.boot.domain;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import javax.persistence.CascadeType;
+import javax.persistence.Entity;
+import javax.persistence.Id;
+import javax.persistence.JoinColumn;
+import javax.persistence.OneToMany;
+
+@Entity
+public class Location {
+
+    private String city;
+    private String country;
+    @Id
+    private Long id;
+
+    @OneToMany(cascade = CascadeType.ALL)
+    @JoinColumn(name = "LOCATION_ID")
+    private List<Store> stores = new ArrayList<>();
+
+    public String getCity() {
+        return city;
+    }
+
+    public String getCountry() {
+        return country;
+    }
+
+    public Long getId() {
+        return id;
+    }
+
+    public List<Store> getStores() {
+        return stores;
+    }
+
+    public void setCity(String city) {
+        this.city = city;
+    }
+
+    public void setCountry(String country) {
+        this.country = country;
+    }
+
+    public void setId(Long id) {
+        this.id = id;
+    }
+
+    public void setStores(List<Store> stores) {
+        this.stores = stores;
+    }
+}
@@ -0,0 +1,66 @@
+package com.baeldung.boot.domain;
+
+import javax.persistence.Entity;
+import javax.persistence.GeneratedValue;
+import javax.persistence.GenerationType;
+import javax.persistence.Id;
+import java.math.BigDecimal;
+
+@Entity
+public class MerchandiseEntity {
+    @Id
+    @GeneratedValue(strategy = GenerationType.AUTO)
+    private Long id;
+
+    private String title;
+
+    private BigDecimal price;
+
+    private String brand;
+
+    public MerchandiseEntity() {
+    }
+
+    public MerchandiseEntity(String title, BigDecimal price) {
+        this.title = title;
+        this.price = price;
+    }
+
+    public Long getId() {
+        return id;
+    }
+
+    public String getTitle() {
+        return title;
+    }
+
+    public void setTitle(String title) {
+        this.title = title;
+    }
+
+    public BigDecimal getPrice() {
+        return price;
+    }
+
+    public void setPrice(BigDecimal price) {
+        this.price = price;
+    }
+
+    public String getBrand() {
+        return brand;
+    }
+
+    public void setBrand(String brand) {
+        this.brand = brand;
+    }
+
+    @Override
+    public String toString() {
+        return "MerchandiseEntity{" +
+                "id=" + id +
+                ", title='" + title + '\'' +
+                ", price=" + price +
+                ", brand='" + brand + '\'' +
+                '}';
+    }
+}
@@ -0,0 +1,30 @@
+package com.baeldung.boot.domain;
+
+import javax.persistence.Embeddable;
+
+@Embeddable
+public class SkillTag {
+    private String name;
+    private int value;
+
+    public SkillTag() {
+    }
+
+    public SkillTag(String name, int value) {
+        super();
+        this.name = name;
+        this.value = value;
+    }
+
+    public int getValue() {
+        return value;
+    }
+
+    public void setValue(int value) {
+        this.value = value;
+    }
+
+    public String getName() {
+        return name;
+    }
+}
@@ -0,0 +1,76 @@
+package com.baeldung.boot.domain;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import javax.persistence.CascadeType;
+import javax.persistence.Entity;
+import javax.persistence.Id;
+import javax.persistence.JoinColumn;
+import javax.persistence.ManyToOne;
+import javax.persistence.OneToMany;
+
+@Entity
+public class Store {
+
+    private Boolean active;
+    @Id
+    private Long id;
+    @OneToMany(cascade = CascadeType.ALL)
+    @JoinColumn(name = "STORE_ID")
+    private List<Item> items = new ArrayList<>();
+    private Long itemsSold;
+
+    @ManyToOne
+    private Location location;
+
+    private String name;
+
+    public Boolean getActive() {
+        return active;
+    }
+
+    public Long getId() {
+        return id;
+    }
+
+    public List<Item> getItems() {
+        return items;
+    }
+
+    public Long getItemsSold() {
+        return itemsSold;
+    }
+
+    public Location getLocation() {
+        return location;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setActive(Boolean active) {
+        this.active = active;
+    }
+
+    public void setId(Long id) {
+        this.id = id;
+    }
+
+    public void setItems(List<Item> items) {
+        this.items = items;
+    }
+
+    public void setItemsSold(Long itemsSold) {
+        this.itemsSold = itemsSold;
+    }
+
+    public void setLocation(Location location) {
+        this.location = location;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+}
@@ -0,0 +1,74 @@
+package com.baeldung.boot.domain;
+
+import javax.persistence.ElementCollection;
+import javax.persistence.Entity;
+import javax.persistence.Id;
+import java.util.ArrayList;
+import java.util.List;
+
+@Entity
+public class Student {
+
+    @Id
+    private long id;
+    private String name;
+
+    @ElementCollection
+    private List<String> tags = new ArrayList<>();
+
+    @ElementCollection
+    private List<SkillTag> skillTags = new ArrayList<>();
+
+    @ElementCollection
+    private List<KVTag> kvTags = new ArrayList<>();
+
+    public Student() {
+    }
+
+    public Student(long id, String name) {
+        super();
+        this.id = id;
+        this.name = name;
+    }
+
+    public long getId() {
+        return id;
+    }
+
+    public void setId(long id) {
+        this.id = id;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public List<String> getTags() {
+        return tags;
+    }
+
+    public void setTags(List<String> tags) {
+        this.tags.addAll(tags);
+    }
+
+    public List<SkillTag> getSkillTags() {
+        return skillTags;
+    }
+
+    public void setSkillTags(List<SkillTag> skillTags) {
+        this.skillTags.addAll(skillTags);
+    }
+
+    public List<KVTag> getKVTags() {
+        return this.kvTags;
+    }
+
+    public void setKVTags(List<KVTag> kvTags) {
+        this.kvTags.addAll(kvTags);
+    }
+
+}
@@ -0,0 +1,35 @@
+package com.baeldung.config;
+
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.core.io.ClassPathResource;
+import org.springframework.core.io.Resource;
+import org.springframework.data.repository.init.Jackson2RepositoryPopulatorFactoryBean;
+import org.springframework.data.repository.init.UnmarshallerRepositoryPopulatorFactoryBean;
+import org.springframework.oxm.jaxb.Jaxb2Marshaller;
+
+import com.baeldung.entity.Fruit;
+
+@Configuration
+public class JpaPopulators {
+
+    @Bean
+    public Jackson2RepositoryPopulatorFactoryBean getRespositoryPopulator() throws Exception {
+        Jackson2RepositoryPopulatorFactoryBean factory = new Jackson2RepositoryPopulatorFactoryBean();
+        factory.setResources(new Resource[] { new ClassPathResource("fruit-data.json") });
+        return factory;
+    }
+
+    @Bean
+    public UnmarshallerRepositoryPopulatorFactoryBean repositoryPopulator() {
+
+        Jaxb2Marshaller unmarshaller = new Jaxb2Marshaller();
+        unmarshaller.setClassesToBeBound(Fruit.class);
+
+        UnmarshallerRepositoryPopulatorFactoryBean factory = new UnmarshallerRepositoryPopulatorFactoryBean();
+        factory.setUnmarshaller(unmarshaller);
+        factory.setResources(new Resource[] { new ClassPathResource("apple-fruit-data.xml"), new ClassPathResource("guava-fruit-data.xml") });
+        return factory;
+    }
+
+}
@@ -0,0 +1,13 @@
+package com.baeldung.derivedquery;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class QueryApplication {
+
+    public static void main(String[] args) {
+        SpringApplication.run(QueryApplication.class, args);
+    }
+
+}
@@ -0,0 +1,70 @@
+package com.baeldung.derivedquery.entity;
+
+import javax.persistence.Entity;
+import javax.persistence.GeneratedValue;
+import javax.persistence.Id;
+import javax.persistence.Table;
+import java.time.ZonedDateTime;
+
+@Table(name = "users")
+@Entity
+public class User {
+
+    @Id
+    @GeneratedValue
+    private Integer id;
+    private String name;
+    private Integer age;
+    private ZonedDateTime birthDate;
+    private Boolean active;
+
+    public User() {
+    }
+
+    public User(String name, Integer age, ZonedDateTime birthDate, Boolean active) {
+        this.name = name;
+        this.age = age;
+        this.birthDate = birthDate;
+        this.active = active;
+    }
+
+    public Integer getId() {
+        return id;
+    }
+
+    public void setId(Integer id) {
+        this.id = id;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public Integer getAge() {
+        return age;
+    }
+
+    public void setAge(Integer age) {
+        this.age = age;
+    }
+
+    public ZonedDateTime getBirthDate() {
+        return birthDate;
+    }
+
+    public void setBirthDate(ZonedDateTime birthDate) {
+        this.birthDate = birthDate;
+    }
+
+    public Boolean getActive() {
+        return active;
+    }
+
+    public void setActive(Boolean active) {
+        this.active = active;
+    }
+}
@@ -0,0 +1,60 @@
+package com.baeldung.derivedquery.repository;
+
+import com.baeldung.derivedquery.entity.User;
+import org.springframework.data.jpa.repository.JpaRepository;
+
+import java.time.ZonedDateTime;
+import java.util.Collection;
+import java.util.List;
+
+public interface UserRepository extends JpaRepository<User, Integer> {
+
+    List<User> findByName(String name);
+
+    List<User> findByNameIs(String name);
+
+    List<User> findByNameEquals(String name);
+
+    List<User> findByNameIsNull();
+
+    List<User> findByNameNot(String name);
+
+    List<User> findByNameIsNot(String name);
+
+    List<User> findByNameStartingWith(String name);
+
+    List<User> findByNameEndingWith(String name);
+
+    List<User> findByNameContaining(String name);
+
+    List<User> findByNameLike(String name);
+
+    List<User> findByAgeLessThan(Integer age);
+
+    List<User> findByAgeLessThanEqual(Integer age);
+
+    List<User> findByAgeGreaterThan(Integer age);
+
+    List<User> findByAgeGreaterThanEqual(Integer age);
+
+    List<User> findByAgeBetween(Integer startAge, Integer endAge);
+
+    List<User> findByBirthDateAfter(ZonedDateTime birthDate);
+
+    List<User> findByBirthDateBefore(ZonedDateTime birthDate);
+
+    List<User> findByActiveTrue();
+
+    List<User> findByActiveFalse();
+
+    List<User> findByAgeIn(Collection<Integer> ages);
+
+    List<User> findByNameOrBirthDate(String name, ZonedDateTime birthDate);
+
+    List<User> findByNameOrBirthDateAndActive(String name, ZonedDateTime birthDate, Boolean active);
+
+    List<User> findByNameOrderByName(String name);
+
+    List<User> findByNameOrderByNameDesc(String name);
+
+}
@@ -0,0 +1,40 @@
+package com.baeldung.entity;
+
+import javax.persistence.Entity;
+import javax.persistence.Id;
+import javax.xml.bind.annotation.XmlRootElement;
+
+@XmlRootElement
+@Entity
+public class Fruit {
+
+    @Id
+    private long id;
+    private String name;
+    private String color;
+
+    public long getId() {
+        return id;
+    }
+
+    public void setId(long id) {
+        this.id = id;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public String getColor() {
+        return color;
+    }
+
+    public void setColor(String color) {
+        this.color = color;
+    }
+
+}
@@ -0,0 +1,78 @@
+package com.baeldung.entity;
+
+import javax.persistence.Basic;
+import javax.persistence.Column;
+import javax.persistence.Entity;
+import javax.persistence.GeneratedValue;
+import javax.persistence.Id;
+import java.util.Objects;
+
+@Entity
+public class Passenger {
+
+    @Id
+    @GeneratedValue
+    @Column(nullable = false)
+    private Long id;
+
+    @Basic(optional = false)
+    @Column(nullable = false)
+    private String firstName;
+
+    @Basic(optional = false)
+    @Column(nullable = false)
+    private String lastName;
+
+    private Passenger(String firstName, String lastName) {
+        this.firstName = firstName;
+        this.lastName = lastName;
+    }
+
+    public static Passenger from(String firstName, String lastName) {
+        return new Passenger(firstName, lastName);
+    }
+
+    public Long getId() {
+        return id;
+    }
+
+    public void setId(Long id) {
+        this.id = id;
+    }
+
+    public String getFirstName() {
+        return firstName;
+    }
+
+    public void setFirstName(String firstName) {
+        this.firstName = firstName;
+    }
+
+    public String getLastName() {
+        return lastName;
+    }
+
+    public void setLastName(String lastName) {
+        this.lastName = lastName;
+    }
+
+    @Override
+    public String toString() {
+        return "Passenger{" + "id=" + id + ", firstName='" + firstName + '\'' + ", lastName='" + lastName + '\'' + '}';
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o)
+            return true;
+        if (o == null || getClass() != o.getClass())
+            return false;
+        Passenger passenger = (Passenger) o;
+        return Objects.equals(firstName, passenger.firstName) && Objects.equals(lastName, passenger.lastName);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(firstName, lastName);
+    }
+}
@@ -0,0 +1,75 @@
+package com.baeldung.entity;
+
+import javax.persistence.Column;
+import javax.persistence.Entity;
+import javax.persistence.Id;
+import java.time.LocalDateTime;
+
+@Entity
+public class Song {
+
+    @Id private long id;
+    private String name;
+    @Column(name = "length_in_seconds")
+    private int lengthInSeconds;
+    private String compositor;
+    private String singer;
+    private LocalDateTime released;
+    private String genre;
+
+    public long getId() {
+        return id;
+    }
+
+    public void setId(long id) {
+        this.id = id;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public int getLengthInSeconds() {
+        return lengthInSeconds;
+    }
+
+    public void setLengthInSeconds(int lengthInSeconds) {
+        this.lengthInSeconds = lengthInSeconds;
+    }
+
+    public String getCompositor() {
+        return compositor;
+    }
+
+    public void setCompositor(String compositor) {
+        this.compositor = compositor;
+    }
+
+    public String getSinger() {
+        return singer;
+    }
+
+    public void setSinger(String singer) {
+        this.singer = singer;
+    }
+
+    public LocalDateTime getReleased() {
+        return released;
+    }
+
+    public void setReleased(LocalDateTime released) {
+        this.released = released;
+    }
+
+    public String getGenre() {
+        return genre;
+    }
+
+    public void setGenre(String genre) {
+        this.genre = genre;
+    }
+}
--- a/Show More
+++ b/Show More