Spark graphx moved to a new project due to a incompatibility of scala compiler

spring-rest/src/main/java/com/baeldung/changeport/CustomApplication.java

@@ -0,0 +1,17 @@
+package com.baeldung.changeport;
+
+import java.util.Collections;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class CustomApplication {
+
+    public static void main(String[] args) {
+        SpringApplication app = new SpringApplication(CustomApplication.class);
+        app.setDefaultProperties(Collections.singletonMap("server.port", "8083"));
+        app.run(args);
+    }
+
+}

spring-rest/src/main/java/com/baeldung/changeport/ServerPortCustomizer.java

@@ -0,0 +1,15 @@
+package com.baeldung.changeport;
+
+import org.springframework.boot.web.server.ConfigurableWebServerFactory;
+import org.springframework.boot.web.server.WebServerFactoryCustomizer;
+import org.springframework.stereotype.Component;
+
+//@Component
+public class ServerPortCustomizer implements WebServerFactoryCustomizer<ConfigurableWebServerFactory> {
+
+    @Override
+    public void customize(ConfigurableWebServerFactory factory) {
+        factory.setPort(8086);
+    }
+
+}

spring-rest/src/main/java/com/baeldung/controllers/DeferredResultController.java

@@ -0,0 +1,76 @@
+package com.baeldung.controllers;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.ui.Model;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RestController;
+import org.springframework.web.context.request.async.DeferredResult;
+
+import java.util.concurrent.ForkJoinPool;
+
+@RestController
+public class DeferredResultController {
+
+	private final static Logger LOG = LoggerFactory.getLogger(DeferredResultController.class);
+
+	@GetMapping("/async-deferredresult")
+	public DeferredResult<ResponseEntity<?>> handleReqDefResult(Model model) {
+	    LOG.info("Received async-deferredresult request");
+	    DeferredResult<ResponseEntity<?>> output = new DeferredResult<>();
+	    ForkJoinPool.commonPool().submit(() -> {
+	        LOG.info("Processing in separate thread");
+	        try {
+			    Thread.sleep(6000);
+	        } catch (InterruptedException e) {
+	        }
+	        output.setResult(ResponseEntity.ok("ok"));
+	    });
+	    LOG.info("servlet thread freed");
+	    return output;
+	}
+
+	public DeferredResult<ResponseEntity<?>> handleReqWithTimeouts(Model model) {
+		LOG.info("Received async request with a configured timeout");
+		DeferredResult<ResponseEntity<?>> deferredResult = new DeferredResult<>(500l);
+		deferredResult.onTimeout(new Runnable() {
+			@Override
+			public void run() {
+				deferredResult.setErrorResult(
+						ResponseEntity.status(HttpStatus.REQUEST_TIMEOUT).body("Request timeout occurred."));
+			}
+		});
+		ForkJoinPool.commonPool().submit(() -> {
+			LOG.info("Processing in separate thread");
+			try {
+				Thread.sleep(600l);
+				deferredResult.setResult(ResponseEntity.ok("ok"));
+			} catch (InterruptedException e) {
+				LOG.info("Request processing interrupted");
+				deferredResult.setErrorResult(ResponseEntity.status(HttpStatus.INTERNAL_SERVER_ERROR)
+						.body("INTERNAL_SERVER_ERROR occurred."));
+			}
+
+		});
+		LOG.info("servlet thread freed");
+		return deferredResult;
+	}
+
+	public DeferredResult<ResponseEntity<?>> handleAsyncFailedRequest(Model model) {
+		DeferredResult<ResponseEntity<?>> deferredResult = new DeferredResult<>();
+		ForkJoinPool.commonPool().submit(() -> {
+			try {
+				// Exception occurred in processing
+				throw new Exception();
+			} catch (Exception e) {
+				LOG.info("Request processing failed");
+				deferredResult.setErrorResult(ResponseEntity.status(HttpStatus.INTERNAL_SERVER_ERROR)
+						.body("INTERNAL_SERVER_ERROR occurred."));
+			}
+		});
+		return deferredResult;
+	}
+
+}

spring-rest/src/main/java/com/baeldung/controllers/ViewController.java

@@ -0,0 +1,14 @@
+package com.baeldung.controllers;
+
+import org.springframework.stereotype.Controller;
+import org.springframework.web.bind.annotation.GetMapping;
+
+@Controller
+public class ViewController {
+
+    @GetMapping("/")
+    public String welcome() {
+        return "index";
+    }
+
+}

spring-rest/src/main/java/com/baeldung/produceimage/ImageApplication.java

@@ -0,0 +1,13 @@
+package com.baeldung.produceimage;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
+import org.springframework.context.annotation.ComponentScan;
+
+@EnableAutoConfiguration
+@ComponentScan("com.baeldung.produceimage")
+public class ImageApplication {
+    public static void main(final String[] args) {
+        SpringApplication.run(ImageApplication.class, args);
+    }
+}

spring-rest/src/main/java/com/baeldung/produceimage/controller/DataProducerController.java

@@ -0,0 +1,38 @@
+package com.baeldung.produceimage.controller;
+
+import org.apache.commons.io.IOUtils;
+import org.springframework.http.MediaType;
+import org.springframework.stereotype.Controller;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.ResponseBody;
+
+import java.io.IOException;
+import java.io.InputStream;
+
+@Controller
+public class DataProducerController {
+
+    @GetMapping("/get-text")
+    public @ResponseBody String getText() {
+        return "Hello world";
+    }
+
+    @GetMapping("/get-image")
+    public @ResponseBody byte[] getImage() throws IOException {
+        final InputStream in = getClass().getResourceAsStream("/com/baeldung/produceimage/image.jpg");
+        return IOUtils.toByteArray(in);
+    }
+
+    @GetMapping(value = "/get-image-with-media-type", produces = MediaType.IMAGE_JPEG_VALUE)
+    public @ResponseBody byte[] getImageWithMediaType() throws IOException {
+        final InputStream in = getClass().getResourceAsStream("/com/baeldung/produceimage/image.jpg");
+        return IOUtils.toByteArray(in);
+    }
+
+    @GetMapping(value = "/get-file", produces = MediaType.APPLICATION_OCTET_STREAM_VALUE)
+    public @ResponseBody byte[] getFile() throws IOException {
+        final InputStream in = getClass().getResourceAsStream("/com/baeldung/produceimage/data.txt");
+        return IOUtils.toByteArray(in);
+    }
+
+}

spring-rest/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-rest/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-rest/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-rest/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-rest/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-rest/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-rest/src/main/java/com/baeldung/responseheaders/ResponseHeadersApplication.java

@@ -0,0 +1,14 @@
+package com.baeldung.responseheaders;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.boot.web.servlet.ServletComponentScan;
+
+@ServletComponentScan
+@SpringBootApplication
+public class ResponseHeadersApplication {
+
+    public static void main(String[] args) {
+        SpringApplication.run(ResponseHeadersApplication.class, args);
+    }
+}

spring-rest/src/main/java/com/baeldung/responseheaders/controllers/FilterResponseHeaderController.java

@@ -0,0 +1,24 @@
+package com.baeldung.responseheaders.controllers;
+
+import javax.servlet.http.HttpServletResponse;
+
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+@RequestMapping("/filter-response-header")
+public class FilterResponseHeaderController {
+
+    @GetMapping("/no-extra-header")
+    public String FilterHeaderResponseWithNoExtraHeader() {
+        return "Response body with Filter header and no extra header";
+    }
+
+    @GetMapping("/extra-header")
+    public String FilterHeaderResponseWithExtraHeader(HttpServletResponse response) {
+        response.addHeader("Baeldung-Example-Header", "Value-ExtraHeader");
+        return "Response body with Filter header and one extra header";
+    }
+
+}

spring-rest/src/main/java/com/baeldung/responseheaders/controllers/ResponseHeaderController.java

@@ -0,0 +1,70 @@
+package com.baeldung.responseheaders.controllers;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+
+import javax.servlet.http.HttpServletResponse;
+
+import org.springframework.http.HttpHeaders;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.MediaType;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+@RequestMapping("/single-response-header")
+public class ResponseHeaderController {
+
+    @GetMapping("/http-servlet-response")
+    public String usingHttpServletResponse(HttpServletResponse response) {
+        response.addHeader("Baeldung-Example-Header", "Value-HttpServletResponse");
+        return "Response with header using HttpServletResponse";
+    }
+
+    @GetMapping("/response-entity-constructor")
+    public ResponseEntity<String> usingResponseEntityConstructor() {
+        HttpHeaders responseHeaders = new HttpHeaders();
+        responseHeaders.set("Baeldung-Example-Header", "Value-ResponseEntityContructor");
+        String responseBody = "Response with header using ResponseEntity (constructor)";
+        HttpStatus responseStatus = HttpStatus.OK;
+
+        return new ResponseEntity<String>(responseBody, responseHeaders, responseStatus);
+    }
+
+    @GetMapping("/response-entity-contructor-multiple-headers")
+    public ResponseEntity<String> usingResponseEntityConstructorAndMultipleHeaders() {
+        List<MediaType> acceptableMediaTypes = new ArrayList<>(Arrays.asList(MediaType.APPLICATION_JSON));
+        HttpHeaders responseHeaders = new HttpHeaders();
+        responseHeaders.set("Baeldung-Example-Header", "Value-ResponseEntityConstructorAndHeaders");
+        responseHeaders.setAccept(acceptableMediaTypes);
+        String responseBody = "Response with header using ResponseEntity (constructor)";
+        HttpStatus responseStatus = HttpStatus.OK;
+
+        return new ResponseEntity<String>(responseBody, responseHeaders, responseStatus);
+    }
+
+    @GetMapping("/response-entity-builder")
+    public ResponseEntity<String> usingResponseEntityBuilder() {
+        String responseHeaderKey = "Baeldung-Example-Header";
+        String responseHeaderValue = "Value-ResponseEntityBuilder";
+        String responseBody = "Response with header using ResponseEntity (builder)";
+
+        return ResponseEntity.ok()
+            .header(responseHeaderKey, responseHeaderValue)
+            .body(responseBody);
+    }
+
+    @GetMapping("/response-entity-builder-with-http-headers")
+    public ResponseEntity<String> usingResponseEntityBuilderAndHttpHeaders() {
+        HttpHeaders responseHeaders = new HttpHeaders();
+        responseHeaders.set("Baeldung-Example-Header", "Value-ResponseEntityBuilderWithHttpHeaders");
+        String responseBody = "Response with header using ResponseEntity (builder)";
+
+        return ResponseEntity.ok()
+            .headers(responseHeaders)
+            .body(responseBody);
+    }
+}

spring-rest/src/main/java/com/baeldung/responseheaders/filter/AddResponseHeaderFilter.java

@@ -0,0 +1,41 @@
+package com.baeldung.responseheaders.filter;
+
+import java.io.IOException;
+
+import javax.servlet.Filter;
+import javax.servlet.FilterChain;
+import javax.servlet.FilterConfig;
+import javax.servlet.ServletException;
+import javax.servlet.ServletRequest;
+import javax.servlet.ServletResponse;
+import javax.servlet.annotation.WebFilter;
+import javax.servlet.http.HttpServletResponse;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+@WebFilter("/filter-response-header/*")
+public class AddResponseHeaderFilter implements Filter {
+
+    private static final Logger LOGGER = LoggerFactory.getLogger(AddResponseHeaderFilter.class);
+
+    @Override
+    public void init(FilterConfig filterConfig) throws ServletException {
+        // add special initialization requirements here
+        LOGGER.trace("Initializing filter...");
+    }
+
+    @Override
+    public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
+        HttpServletResponse httpServletResponse = (HttpServletResponse) response;
+        httpServletResponse.setHeader("Baeldung-Example-Filter-Header", "Value-Filter");
+        chain.doFilter(request, response);
+    }
+
+    @Override
+    public void destroy() {
+        // clean up any resource being held by the filter here
+        LOGGER.trace("Destroying filter...");
+    }
+
+}

spring-rest/src/main/java/com/baeldung/resttemplate/lists/EmployeeApplication.java

@@ -0,0 +1,16 @@
+package com.baeldung.resttemplate.lists;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+/**
+ * Sample application used to demonstrate working with Lists and RestTemplate.
+ */
+@SpringBootApplication
+public class EmployeeApplication
+{
+    public static void main(String[] args)
+    {
+        SpringApplication.run(EmployeeApplication.class, args);
+    }
+}

spring-rest/src/main/java/com/baeldung/resttemplate/lists/client/EmployeeClient.java

@@ -0,0 +1,101 @@
+package com.baeldung.resttemplate.lists.client;
+
+import org.springframework.core.ParameterizedTypeReference;
+import org.springframework.http.*;
+import org.springframework.web.client.RestTemplate;
+
+import com.baeldung.resttemplate.lists.dto.Employee;
+import com.baeldung.resttemplate.lists.dto.EmployeeList;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * Application that shows how to use Lists with RestTemplate.
+ */
+public class EmployeeClient
+{
+    public static void main(String[] args)
+    {
+        EmployeeClient employeeClient = new EmployeeClient();
+
+        System.out.println("Calling GET using ParameterizedTypeReference");
+        employeeClient.getAllEmployeesUsingParameterizedTypeReference();
+
+        System.out.println("Calling GET using wrapper class");
+        employeeClient.getAllEmployeesUsingWrapperClass();
+
+        System.out.println("Calling POST using normal lists");
+        employeeClient.createEmployeesUsingLists();
+
+        System.out.println("Calling POST using wrapper class");
+        employeeClient.createEmployeesUsingWrapperClass();
+    }
+
+    public EmployeeClient()
+    {
+
+    }
+
+    public List<Employee> getAllEmployeesUsingParameterizedTypeReference()
+    {
+        RestTemplate restTemplate = new RestTemplate();
+
+        ResponseEntity<List<Employee>> response =
+                restTemplate.exchange(
+                        "http://localhost:8082/spring-rest/employees/",
+                        HttpMethod.GET,
+                        null,
+                        new ParameterizedTypeReference<List<Employee>>(){});
+
+        List<Employee> employees = response.getBody();
+
+        employees.forEach(e -> System.out.println(e));
+
+        return employees;
+    }
+
+    public List<Employee> getAllEmployeesUsingWrapperClass()
+    {
+        RestTemplate restTemplate = new RestTemplate();
+
+        EmployeeList response =
+                restTemplate.getForObject(
+                        "http://localhost:8082/spring-rest/employees/v2",
+                        EmployeeList.class);
+
+        List<Employee> employees = response.getEmployees();
+
+        employees.forEach(e -> System.out.println(e));
+
+        return employees;
+    }
+
+    public void createEmployeesUsingLists()
+    {
+        RestTemplate restTemplate = new RestTemplate();
+
+        List<Employee> newEmployees = new ArrayList<>();
+        newEmployees.add(new Employee(3, "Intern"));
+        newEmployees.add(new Employee(4, "CEO"));
+
+        restTemplate.postForObject(
+                "http://localhost:8082/spring-rest/employees/",
+                newEmployees,
+                ResponseEntity.class);
+    }
+
+    public void createEmployeesUsingWrapperClass()
+    {
+        RestTemplate restTemplate = new RestTemplate();
+
+        List<Employee> newEmployees = new ArrayList<>();
+        newEmployees.add(new Employee(3, "Intern"));
+        newEmployees.add(new Employee(4, "CEO"));
+
+        restTemplate.postForObject(
+                "http://localhost:8082/spring-rest/employees/v2/",
+                new EmployeeList(newEmployees),
+                ResponseEntity.class);
+    }
+}

spring-rest/src/main/java/com/baeldung/resttemplate/lists/controller/EmployeeResource.java

@@ -0,0 +1,46 @@
+package com.baeldung.resttemplate.lists.controller;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RequestMethod;
+import org.springframework.web.bind.annotation.RestController;
+
+import com.baeldung.resttemplate.lists.dto.Employee;
+import com.baeldung.resttemplate.lists.dto.EmployeeList;
+import com.baeldung.resttemplate.lists.service.EmployeeService;
+
+import java.util.List;
+
+@RestController
+@RequestMapping("/employees")
+public class EmployeeResource
+{
+    @Autowired
+    private EmployeeService employeeService;
+
+    @RequestMapping(method = RequestMethod.GET, path = "/")
+    public List<Employee> getEmployees()
+    {
+        return employeeService.getAllEmployees();
+    }
+
+    @RequestMapping(method = RequestMethod.GET, path = "/v2")
+    public EmployeeList getEmployeesUsingWrapperClass()
+    {
+        List<Employee> employees = employeeService.getAllEmployees();
+        return new EmployeeList(employees);
+    }
+
+    @RequestMapping(method = RequestMethod.POST, path = "/")
+    public void addEmployees(@RequestBody List<Employee> employees)
+    {
+        employeeService.addEmployees(employees);
+    }
+
+    @RequestMapping(method = RequestMethod.POST, path = "/v2")
+    public void addEmployeesUsingWrapperClass(@RequestBody EmployeeList employeeWrapper)
+    {
+        employeeService.addEmployees(employeeWrapper.getEmployees());
+    }
+}

spring-rest/src/main/java/com/baeldung/resttemplate/lists/dto/Employee.java

@@ -0,0 +1,40 @@
+package com.baeldung.resttemplate.lists.dto;
+
+public class Employee {
+
+    public long id;
+    public String title;
+
+    public Employee()
+    {
+
+    }
+
+    public Employee(long id, String title)
+    {
+        this.id = id;
+        this.title = title;
+    }
+
+    public long getId() {
+        return id;
+    }
+
+    public void setId(long id) {
+        this.id = id;
+    }
+
+    public String getTitle() {
+        return title;
+    }
+
+    public void setTitle(String title) {
+        this.title = title;
+    }
+
+    @Override
+    public String toString()
+    {
+        return "Employee #" + id + "["  + title + "]";
+    }
+}

spring-rest/src/main/java/com/baeldung/resttemplate/lists/dto/EmployeeList.java

@@ -0,0 +1,29 @@
+package com.baeldung.resttemplate.lists.dto;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class EmployeeList
+{
+    public List<Employee> employees;
+
+    public EmployeeList()
+    {
+        employees = new ArrayList<>();
+    }
+
+    public EmployeeList(List<Employee> employees)
+    {
+        this.employees = employees;
+    }
+
+    public void setEmployees(List<Employee> employees)
+    {
+        this.employees = employees;
+    }
+
+    public List<Employee> getEmployees()
+    {
+        return employees;
+    }
+}

spring-rest/src/main/java/com/baeldung/resttemplate/lists/service/EmployeeService.java

@@ -0,0 +1,25 @@
+package com.baeldung.resttemplate.lists.service;
+
+import org.springframework.stereotype.Service;
+
+import com.baeldung.resttemplate.lists.dto.Employee;
+
+import java.util.ArrayList;
+import java.util.List;
+
+@Service
+public class EmployeeService
+{
+    public List<Employee> getAllEmployees()
+    {
+        List<Employee> employees = new ArrayList<>();
+        employees.add(new Employee(1, "Manager"));
+        employees.add(new Employee(2, "Java Developer"));
+        return employees;
+    }
+
+    public void addEmployees(List<Employee> employees)
+    {
+        employees.forEach(e -> System.out.println("Adding new employee " + e));
+    }
+}

spring-rest/src/main/java/com/baeldung/sampleapp/config/MainApplication.java

@@ -0,0 +1,15 @@
+package com.baeldung.sampleapp.config;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
+import org.springframework.context.annotation.ComponentScan;
+import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
+
+@EnableAutoConfiguration
+@ComponentScan("com.baeldung.sampleapp")
+public class MainApplication implements WebMvcConfigurer {
+
+    public static void main(final String[] args) {
+        SpringApplication.run(MainApplication.class, args);
+    }
+}

spring-rest/src/main/java/com/baeldung/sampleapp/config/RestClientConfig.java

@@ -0,0 +1,29 @@
+package com.baeldung.sampleapp.config;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.http.client.ClientHttpRequestInterceptor;
+import org.springframework.util.CollectionUtils;
+import org.springframework.web.client.RestTemplate;
+
+import com.baeldung.sampleapp.interceptors.RestTemplateHeaderModifierInterceptor;
+
+@Configuration
+public class RestClientConfig {
+
+    @Bean
+    public RestTemplate restTemplate() {
+        RestTemplate restTemplate = new RestTemplate();
+
+        List<ClientHttpRequestInterceptor> interceptors = restTemplate.getInterceptors();
+        if (CollectionUtils.isEmpty(interceptors)) {
+            interceptors = new ArrayList<ClientHttpRequestInterceptor>();
+        }
+        interceptors.add(new RestTemplateHeaderModifierInterceptor());
+        restTemplate.setInterceptors(interceptors);
+        return restTemplate;
+    }
+}

spring-rest/src/main/java/com/baeldung/sampleapp/config/WebConfig.java

@@ -0,0 +1,42 @@
+package com.baeldung.sampleapp.config;
+
+import java.text.SimpleDateFormat;
+import java.util.List;
+
+import org.springframework.context.annotation.ComponentScan;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.http.converter.HttpMessageConverter;
+import org.springframework.http.converter.json.Jackson2ObjectMapperBuilder;
+import org.springframework.http.converter.json.MappingJackson2HttpMessageConverter;
+import org.springframework.web.servlet.config.annotation.EnableWebMvc;
+import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
+
+/*
+ * Please note that main web configuration is in src/main/webapp/WEB-INF/api-servlet.xml
+ */
+@Configuration
+@EnableWebMvc
+@ComponentScan({ "com.baeldung.sampleapp.web" })
+public class WebConfig implements WebMvcConfigurer {
+
+    public WebConfig() {
+        super();
+    }
+
+    /*
+    @Override
+    public void configureMessageConverters(final List<HttpMessageConverter<?>> messageConverters) {
+        final Jackson2ObjectMapperBuilder builder = new Jackson2ObjectMapperBuilder();
+        builder.indentOutput(true)
+            .dateFormat(new SimpleDateFormat("dd-MM-yyyy hh:mm"));
+        messageConverters.add(new MappingJackson2HttpMessageConverter(builder.build()));
+        // messageConverters.add(new MappingJackson2XmlHttpMessageConverter(builder.createXmlMapper(true).build()));
+
+        // messageConverters.add(new MappingJackson2HttpMessageConverter());
+    
+        // messageConverters.add(new ProtobufHttpMessageConverter());
+    
+    }
+    
+    */
+}

spring-rest/src/main/java/com/baeldung/sampleapp/interceptors/RestTemplateHeaderModifierInterceptor.java

@@ -0,0 +1,18 @@
+package com.baeldung.sampleapp.interceptors;
+
+import java.io.IOException;
+
+import org.springframework.http.HttpRequest;
+import org.springframework.http.client.ClientHttpRequestExecution;
+import org.springframework.http.client.ClientHttpRequestInterceptor;
+import org.springframework.http.client.ClientHttpResponse;
+
+public class RestTemplateHeaderModifierInterceptor implements ClientHttpRequestInterceptor {
+
+    @Override
+    public ClientHttpResponse intercept(HttpRequest request, byte[] body, ClientHttpRequestExecution execution) throws IOException {
+        ClientHttpResponse response = execution.execute(request, body); 
+        response.getHeaders().add("Foo", "bar");
+        return response;
+    }
+}

spring-rest/src/main/java/com/baeldung/sampleapp/repository/HeavyResourceRepository.java

@@ -0,0 +1,28 @@
+package com.baeldung.sampleapp.repository;
+
+import java.util.Map;
+
+import com.baeldung.sampleapp.web.dto.HeavyResource;
+import com.baeldung.sampleapp.web.dto.HeavyResourceAddressOnly;
+
+public class HeavyResourceRepository {
+
+    public void save(HeavyResource heavyResource) {
+    }
+
+    public void save(HeavyResourceAddressOnly partialUpdate) {
+
+    }
+
+    public void save(Map<String, Object> updates, String id) {
+
+    }
+
+    public void save(HeavyResource heavyResource, String id) {
+
+    }
+
+    public void save(HeavyResourceAddressOnly partialUpdate, String id) {
+
+    }
+}

spring-rest/src/main/java/com/baeldung/sampleapp/web/controller/BarMappingExamplesController.java

@@ -0,0 +1,47 @@
+package com.baeldung.sampleapp.web.controller;
+
+import org.springframework.stereotype.Controller;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RequestParam;
+import org.springframework.web.bind.annotation.ResponseBody;
+
+@Controller
+@RequestMapping(value = "/ex")
+public class BarMappingExamplesController {
+
+    public BarMappingExamplesController() {
+        super();
+    }
+
+    // API
+
+    // with @RequestParam
+
+    @RequestMapping(value = "/bars")
+    @ResponseBody
+    public String getBarBySimplePathWithRequestParam(@RequestParam("id") final long id) {
+        return "Get a specific Bar with id=" + id;
+    }
+
+    @RequestMapping(value = "/bars", params = "id")
+    @ResponseBody
+    public String getBarBySimplePathWithExplicitRequestParam(@RequestParam("id") final long id) {
+        return "Get a specific Bar with id=" + id;
+    }
+
+    @RequestMapping(value = "/bars", params = { "id", "second" })
+    @ResponseBody
+    public String getBarBySimplePathWithExplicitRequestParams(@RequestParam("id") final long id) {
+        return "Get a specific Bar with id=" + id;
+    }
+
+    // with @PathVariable
+
+    @RequestMapping(value = "/bars/{numericId:[\\d]+}")
+    @ResponseBody
+    public String getBarsBySimplePathWithPathVariable(@PathVariable final long numericId) {
+        return "Get a specific Bar with id=" + numericId;
+    }
+
+}

spring-rest/src/main/java/com/baeldung/sampleapp/web/controller/CompanyController.java

@@ -0,0 +1,17 @@
+package com.baeldung.sampleapp.web.controller;
+
+import org.springframework.http.MediaType;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+import com.baeldung.sampleapp.web.dto.Company;
+
+@RestController
+public class CompanyController {
+
+    @RequestMapping(value = "/companyRest", produces = MediaType.APPLICATION_JSON_VALUE)
+    public Company getCompanyRest() {
+        final Company company = new Company(1, "Xpto");
+        return company;
+    }
+}

spring-rest/src/main/java/com/baeldung/sampleapp/web/controller/DeferredResultController.java

@@ -0,0 +1,85 @@
+package com.baeldung.sampleapp.web.controller;
+
+import java.util.concurrent.CompletableFuture;
+import java.util.function.Consumer;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.ui.Model;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RestController;
+import org.springframework.web.context.request.async.DeferredResult;
+
+@RestController
+public class DeferredResultController {
+
+    private final static Logger LOG = LoggerFactory.getLogger(DeferredResultController.class);
+
+    @GetMapping("/async-deferredresult")
+    public DeferredResult<ResponseEntity<?>> handleReqDefResult(Model model) {
+        LOG.info("Received request");
+        DeferredResult<ResponseEntity<?>> deferredResult = new DeferredResult<>();
+
+        deferredResult.onCompletion(() -> LOG.info("Processing complete"));
+
+        CompletableFuture.supplyAsync(() -> {
+            LOG.info("Processing in separate thread");
+            try {
+                Thread.sleep(6000);
+            } catch (InterruptedException e) {
+                e.printStackTrace();
+            }
+            return "OK";
+        })
+            .whenCompleteAsync((result, exc) -> deferredResult.setResult(ResponseEntity.ok(result)));
+
+        LOG.info("Servlet thread freed");
+        return deferredResult;
+    }
+
+    @GetMapping("/process-blocking")
+    public ResponseEntity<?> handleReqSync(Model model) {
+        // ...
+        return ResponseEntity.ok("ok");
+    }
+
+    @GetMapping("/async-deferredresult-timeout")
+    public DeferredResult<ResponseEntity<?>> handleReqWithTimeouts(Model model) {
+        LOG.info("Received async request with a configured timeout");
+        DeferredResult<ResponseEntity<?>> deferredResult = new DeferredResult<>(500l);
+        deferredResult.onTimeout(() -> deferredResult.setErrorResult(ResponseEntity.status(HttpStatus.REQUEST_TIMEOUT)
+            .body("Request timeout occurred.")));
+
+        CompletableFuture.supplyAsync(() -> {
+            LOG.info("Processing in separate thread");
+            try {
+                Thread.sleep(6000);
+            } catch (InterruptedException e) {
+                e.printStackTrace();
+            }
+            return "error";
+        })
+            .whenCompleteAsync((result, exc) -> deferredResult.setResult(ResponseEntity.ok(result)));
+        LOG.info("servlet thread freed");
+        return deferredResult;
+    }
+
+    @GetMapping("/async-deferredresult-error")
+    public DeferredResult<ResponseEntity<?>> handleAsyncFailedRequest(Model model) {
+        LOG.info("Received async request with a configured error handler");
+        DeferredResult<ResponseEntity<?>> deferredResult = new DeferredResult<>();
+        deferredResult.onError(new Consumer<Throwable>() {
+            @Override
+            public void accept(Throwable t) {
+                deferredResult.setErrorResult(ResponseEntity.status(HttpStatus.INTERNAL_SERVER_ERROR)
+                    .body("An error occurred."));
+            }
+
+        });
+        LOG.info("servlet thread freed");
+        return deferredResult;
+    }
+
+}

spring-rest/src/main/java/com/baeldung/sampleapp/web/controller/HeavyResourceController.java

@@ -0,0 +1,42 @@
+package com.baeldung.sampleapp.web.controller;
+
+
+import java.util.Map;
+
+import org.springframework.http.MediaType;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RequestMethod;
+import org.springframework.web.bind.annotation.RestController;
+
+import com.baeldung.sampleapp.repository.HeavyResourceRepository;
+import com.baeldung.sampleapp.web.dto.HeavyResource;
+import com.baeldung.sampleapp.web.dto.HeavyResourceAddressOnly;
+
+@RestController
+public class HeavyResourceController {
+
+    private HeavyResourceRepository heavyResourceRepository = new HeavyResourceRepository();
+
+    @RequestMapping(value = "/heavyresource/{id}", method = RequestMethod.PUT, consumes = MediaType.APPLICATION_JSON_VALUE)
+    public ResponseEntity<?> saveResource(@RequestBody HeavyResource heavyResource, @PathVariable("id") String id) {
+        heavyResourceRepository.save(heavyResource, id);
+        return ResponseEntity.ok("resource saved");
+    }
+
+    @RequestMapping(value = "/heavyresource/{id}", method = RequestMethod.PATCH, consumes = MediaType.APPLICATION_JSON_VALUE)
+    public ResponseEntity<?> partialUpdateName(@RequestBody HeavyResourceAddressOnly partialUpdate, @PathVariable("id") String id) {
+        heavyResourceRepository.save(partialUpdate, id);
+        return ResponseEntity.ok("resource address updated");
+    }
+
+    @RequestMapping(value = "/heavyresource2/{id}", method = RequestMethod.PATCH, consumes = MediaType.APPLICATION_JSON_VALUE)
+    public ResponseEntity<?> partialUpdateGeneric(@RequestBody Map<String, Object> updates,
+                                                  @PathVariable("id") String id) {
+        heavyResourceRepository.save(updates, id);
+        return ResponseEntity.ok("resource updated");
+    }
+
+}

spring-rest/src/main/java/com/baeldung/sampleapp/web/controller/ItemController.java

@@ -0,0 +1,39 @@
+package com.baeldung.sampleapp.web.controller;
+
+import java.util.Date;
+
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+import com.baeldung.sampleapp.web.dto.Item;
+import com.baeldung.sampleapp.web.dto.ItemManager;
+import com.baeldung.sampleapp.web.dto.Views;
+import com.fasterxml.jackson.annotation.JsonView;
+
+@RestController
+public class ItemController {
+
+    @JsonView(Views.Public.class)
+    @RequestMapping("/items/{id}")
+    public Item getItemPublic(@PathVariable final int id) {
+        return ItemManager.getById(id);
+    }
+
+    @JsonView(Views.Internal.class)
+    @RequestMapping("/items/internal/{id}")
+    public Item getItemInternal(@PathVariable final int id) {
+        return ItemManager.getById(id);
+    }
+
+    @RequestMapping("/date")
+    public Date getCurrentDate() throws Exception {
+        return new Date();
+    }
+
+    @RequestMapping("/delay/{seconds}")
+    public void getCurrentTime(@PathVariable final int seconds) throws Exception {
+
+        Thread.sleep(seconds * 1000);
+    }
+}

spring-rest/src/main/java/com/baeldung/sampleapp/web/controller/MyFooController.java

@@ -0,0 +1,85 @@
+package com.baeldung.sampleapp.web.controller;
+
+import java.util.Collection;
+import java.util.HashMap;
+import java.util.Map;
+
+import javax.servlet.http.HttpServletResponse;
+
+import org.springframework.http.HttpStatus;
+import org.springframework.stereotype.Controller;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RequestMethod;
+import org.springframework.web.bind.annotation.ResponseBody;
+import org.springframework.web.bind.annotation.ResponseStatus;
+import org.springframework.web.servlet.support.ServletUriComponentsBuilder;
+
+import com.baeldung.sampleapp.web.dto.Foo;
+import com.baeldung.sampleapp.web.exception.ResourceNotFoundException;
+
+@Controller
+@RequestMapping(value = "/foos")
+public class MyFooController {
+
+    private final Map<Long, Foo> myfoos;
+
+    public MyFooController() {
+        super();
+        myfoos = new HashMap<Long, Foo>();
+        myfoos.put(1L, new Foo(1L, "sample foo"));
+    }
+
+    // API - read
+
+    @RequestMapping(method = RequestMethod.GET, produces = { "application/json" })
+    @ResponseBody
+    public Collection<Foo> findAll() {
+        return myfoos.values();
+    }
+
+    @RequestMapping(method = RequestMethod.GET, value = "/{id}", produces = { "application/json" })
+    @ResponseBody
+    public Foo findById(@PathVariable final long id) {
+        final Foo foo = myfoos.get(id);
+        if (foo == null) {
+            throw new ResourceNotFoundException();
+        }
+        return foo;
+    }
+
+    // API - write
+
+    @RequestMapping(method = RequestMethod.PUT, value = "/{id}")
+    @ResponseStatus(HttpStatus.OK)
+    @ResponseBody
+    public Foo updateFoo(@PathVariable("id") final long id, @RequestBody final Foo foo) {
+        myfoos.put(id, foo);
+        return foo;
+    }
+
+    @RequestMapping(method = RequestMethod.PATCH, value = "/{id}")
+    @ResponseStatus(HttpStatus.OK)
+    public void updateFoo2(@PathVariable("id") final long id, @RequestBody final Foo foo) {
+        myfoos.put(id, foo);
+    }
+
+    @RequestMapping(method = RequestMethod.POST)
+    @ResponseStatus(HttpStatus.CREATED)
+    @ResponseBody
+    public Foo createFoo(@RequestBody final Foo foo, HttpServletResponse response) {
+        myfoos.put(foo.getId(), foo);
+        response.setHeader("Location", ServletUriComponentsBuilder.fromCurrentRequest()
+            .path("/" + foo.getId())
+            .toUriString());
+        return foo;
+    }
+
+    @RequestMapping(method = RequestMethod.DELETE, value = "/{id}")
+    @ResponseStatus(HttpStatus.OK)
+    public void deleteById(@PathVariable final long id) {
+        myfoos.remove(id);
+    }
+
+}

spring-rest/src/main/java/com/baeldung/sampleapp/web/controller/PactController.java

@@ -0,0 +1,33 @@
+package com.baeldung.sampleapp.web.controller;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import org.springframework.http.HttpStatus;
+import org.springframework.http.MediaType;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.ResponseBody;
+import org.springframework.web.bind.annotation.ResponseStatus;
+import org.springframework.web.bind.annotation.RestController;
+
+import com.baeldung.sampleapp.web.dto.PactDto;
+
+@RestController
+public class PactController {
+
+    List<PactDto> pacts = new ArrayList<>();
+
+    @GetMapping(value = "/pact", produces = MediaType.APPLICATION_JSON_VALUE)
+    @ResponseBody
+    public PactDto getPact() {
+        return new PactDto(true, "tom");
+    }
+
+    @PostMapping("/pact")
+    @ResponseStatus(HttpStatus.CREATED)
+    public void createPact(PactDto pact) {
+        pacts.add(pact);
+    }
+
+}

spring-rest/src/main/java/com/baeldung/sampleapp/web/controller/SimplePostController.java

@@ -0,0 +1,74 @@
+package com.baeldung.sampleapp.web.controller;
+
+import java.io.BufferedOutputStream;
+import java.io.File;
+import java.io.FileOutputStream;
+import java.text.DateFormat;
+import java.text.SimpleDateFormat;
+import java.util.Date;
+
+import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RequestMethod;
+import org.springframework.web.bind.annotation.RequestParam;
+import org.springframework.web.bind.annotation.RestController;
+import org.springframework.web.multipart.MultipartFile;
+
+import com.baeldung.sampleapp.web.dto.Foo;
+
+// used to test HttpClientPostingTest
+@RestController
+public class SimplePostController {
+
+    @RequestMapping(value = "/users", method = RequestMethod.POST)
+    public String postUser(@RequestParam final String username, @RequestParam final String password) {
+        return "Success" + username;
+    }
+
+    @RequestMapping(value = "/users/detail", method = RequestMethod.POST)
+    public String postUserDetail(@RequestBody final Foo entity) {
+        return "Success" + entity.getId();
+    }
+
+    @RequestMapping(value = "/users/multipart", method = RequestMethod.POST)
+    public String uploadFile(@RequestParam final String username, @RequestParam final String password, @RequestParam("file") final MultipartFile file) {
+        if (!file.isEmpty()) {
+            try {
+                final DateFormat dateFormat = new SimpleDateFormat("yyyy_MM_dd_HH.mm.ss");
+                final String fileName = dateFormat.format(new Date());
+                final File fileServer = new File(fileName);
+                fileServer.createNewFile();
+                final byte[] bytes = file.getBytes();
+                final BufferedOutputStream stream = new BufferedOutputStream(new FileOutputStream(fileServer));
+                stream.write(bytes);
+                stream.close();
+                return "You successfully uploaded " + username;
+            } catch (final Exception e) {
+                return "You failed to upload " + e.getMessage();
+            }
+        } else {
+            return "You failed to upload because the file was empty.";
+        }
+    }
+
+    @RequestMapping(value = "/users/upload", method = RequestMethod.POST)
+    public String postMultipart(@RequestParam("file") final MultipartFile file) {
+        if (!file.isEmpty()) {
+            try {
+                final DateFormat dateFormat = new SimpleDateFormat("yyyy_MM_dd_HH.mm.ss");
+                final String fileName = dateFormat.format(new Date());
+                final File fileServer = new File(fileName);
+                fileServer.createNewFile();
+                final byte[] bytes = file.getBytes();
+                final BufferedOutputStream stream = new BufferedOutputStream(new FileOutputStream(fileServer));
+                stream.write(bytes);
+                stream.close();
+                return "You successfully uploaded ";
+            } catch (final Exception e) {
+                return "You failed to upload " + e.getMessage();
+            }
+        } else {
+            return "You failed to upload because the file was empty.";
+        }
+    }
+}

spring-rest/src/main/java/com/baeldung/sampleapp/web/controller/mediatypes/CustomMediaTypeController.java

@@ -0,0 +1,25 @@
+package com.baeldung.sampleapp.web.controller.mediatypes;
+
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RequestMethod;
+import org.springframework.web.bind.annotation.ResponseBody;
+import org.springframework.web.bind.annotation.RestController;
+
+import com.baeldung.sampleapp.web.dto.BaeldungItem;
+import com.baeldung.sampleapp.web.dto.BaeldungItemV2;
+
+@RestController
+@RequestMapping(value = "/", produces = "application/vnd.baeldung.api.v1+json")
+public class CustomMediaTypeController {
+
+    @RequestMapping(method = RequestMethod.GET, value = "/public/api/items/{id}", produces = "application/vnd.baeldung.api.v1+json")
+    public @ResponseBody BaeldungItem getItem(@PathVariable("id") String id) {
+        return new BaeldungItem("itemId1");
+    }
+
+    @RequestMapping(method = RequestMethod.GET, value = "/public/api/items/{id}", produces = "application/vnd.baeldung.api.v2+json")
+    public @ResponseBody BaeldungItemV2 getItemSecondAPIVersion(@PathVariable("id") String id) {
+        return new BaeldungItemV2("itemName");
+    }
+}

spring-rest/src/main/java/com/baeldung/sampleapp/web/controller/redirect/RedirectController.java

@@ -0,0 +1,68 @@
+package com.baeldung.sampleapp.web.controller.redirect;
+
+import javax.servlet.http.HttpServletRequest;
+
+import org.springframework.http.HttpStatus;
+import org.springframework.stereotype.Controller;
+import org.springframework.ui.ModelMap;
+import org.springframework.web.bind.annotation.ModelAttribute;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RequestMethod;
+import org.springframework.web.servlet.ModelAndView;
+import org.springframework.web.servlet.View;
+import org.springframework.web.servlet.mvc.support.RedirectAttributes;
+import org.springframework.web.servlet.view.RedirectView;
+
+@Controller
+@RequestMapping("/")
+public class RedirectController {
+
+    @RequestMapping(value = "/redirectWithXMLConfig", method = RequestMethod.GET)
+    public ModelAndView redirectWithUsingXMLConfig(final ModelMap model) {
+        model.addAttribute("attribute", "redirectWithXMLConfig");
+        return new ModelAndView("RedirectedUrl", model);
+    }
+
+    @RequestMapping(value = "/redirectWithRedirectPrefix", method = RequestMethod.GET)
+    public ModelAndView redirectWithUsingRedirectPrefix(final ModelMap model) {
+        model.addAttribute("attribute", "redirectWithRedirectPrefix");
+        return new ModelAndView("redirect:/redirectedUrl", model);
+    }
+
+    @RequestMapping(value = "/redirectWithRedirectAttributes", method = RequestMethod.GET)
+    public RedirectView redirectWithRedirectAttributes(final RedirectAttributes redirectAttributes) {
+        redirectAttributes.addFlashAttribute("flashAttribute", "redirectWithRedirectAttributes");
+        redirectAttributes.addAttribute("attribute", "redirectWithRedirectAttributes");
+        return new RedirectView("redirectedUrl");
+    }
+
+    @RequestMapping(value = "/redirectWithRedirectView", method = RequestMethod.GET)
+    public RedirectView redirectWithUsingRedirectView(final ModelMap model) {
+        model.addAttribute("attribute", "redirectWithRedirectView");
+        return new RedirectView("redirectedUrl");
+    }
+
+    @RequestMapping(value = "/forwardWithForwardPrefix", method = RequestMethod.GET)
+    public ModelAndView forwardWithUsingForwardPrefix(final ModelMap model) {
+        model.addAttribute("attribute", "redirectWithForwardPrefix");
+        return new ModelAndView("forward:/redirectedUrl", model);
+    }
+
+    @RequestMapping(value = "/redirectedUrl", method = RequestMethod.GET)
+    public ModelAndView redirection(final ModelMap model, @ModelAttribute("flashAttribute") final Object flashAttribute) {
+        model.addAttribute("redirectionAttribute", flashAttribute);
+        return new ModelAndView("redirection", model);
+    }
+
+    @RequestMapping(value = "/redirectPostToPost", method = RequestMethod.POST)
+    public ModelAndView redirectPostToPost(HttpServletRequest request) {
+        request.setAttribute(View.RESPONSE_STATUS_ATTRIBUTE, HttpStatus.TEMPORARY_REDIRECT);
+        return new ModelAndView("redirect:/redirectedPostToPost");
+    }
+
+    @RequestMapping(value = "/redirectedPostToPost", method = RequestMethod.POST)
+    public ModelAndView redirectedPostToPost() {
+        return new ModelAndView("redirection");
+    }
+
+}

spring-rest/src/main/java/com/baeldung/sampleapp/web/dto/BaeldungItem.java

@@ -0,0 +1,13 @@
+package com.baeldung.sampleapp.web.dto;
+
+public class BaeldungItem {
+    private final String itemId;
+
+    public BaeldungItem(String itemId) {
+        this.itemId = itemId;
+    }
+
+    public String getItemId() {
+        return itemId;
+    }
+}

spring-rest/src/main/java/com/baeldung/sampleapp/web/dto/BaeldungItemV2.java

@@ -0,0 +1,14 @@
+package com.baeldung.sampleapp.web.dto;
+
+
+public class BaeldungItemV2 {
+    private final String itemName;
+
+    public BaeldungItemV2(String itemName) {
+        this.itemName = itemName;
+    }
+
+    public String getItemName() {
+        return itemName;
+    }
+}

spring-rest/src/main/java/com/baeldung/sampleapp/web/dto/Company.java

@@ -0,0 +1,38 @@
+package com.baeldung.sampleapp.web.dto;
+
+public class Company {
+
+    private long id;
+    private String name;
+
+    public Company() {
+        super();
+    }
+
+    public Company(final long id, final String name) {
+        this.id = id;
+        this.name = name;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(final String name) {
+        this.name = name;
+    }
+
+    public long getId() {
+        return id;
+    }
+
+    public void setId(final long id) {
+        this.id = id;
+    }
+
+    @Override
+    public String toString() {
+        return "Company [id=" + id + ", name=" + name + "]";
+    }
+
+}

spring-rest/src/main/java/com/baeldung/sampleapp/web/dto/Foo.java

@@ -0,0 +1,42 @@
+package com.baeldung.sampleapp.web.dto;
+
+public class Foo {
+    private long id;
+    private String name;
+
+    public Foo() {
+        super();
+    }
+
+    public Foo(final String name) {
+        super();
+
+        this.name = name;
+    }
+
+    public Foo(final long id, final String name) {
+        super();
+
+        this.id = id;
+        this.name = name;
+    }
+
+    // API
+
+    public long getId() {
+        return id;
+    }
+
+    public void setId(final long id) {
+        this.id = id;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(final String name) {
+        this.name = name;
+    }
+
+}

spring-rest/src/main/java/com/baeldung/sampleapp/web/dto/HeavyResource.java

@@ -0,0 +1,62 @@
+package com.baeldung.sampleapp.web.dto;
+
+
+public class HeavyResource {
+    private Integer id;
+    private String name;
+    private String surname;
+    private Integer age;
+    private String address;
+
+
+    public HeavyResource() {
+    }
+
+    public HeavyResource(Integer id, String name, String surname, Integer age, String address) {
+        this.id = id;
+        this.name = name;
+        this.surname = surname;
+        this.age = age;
+        this.address = address;
+    }
+
+    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 String getSurname() {
+        return surname;
+    }
+
+    public void setSurname(String surname) {
+        this.surname = surname;
+    }
+
+    public Integer getAge() {
+        return age;
+    }
+
+    public void setAge(Integer age) {
+        this.age = age;
+    }
+
+    public String getAddress() {
+        return address;
+    }
+
+    public void setAddress(String address) {
+        this.address = address;
+    }
+}

spring-rest/src/main/java/com/baeldung/sampleapp/web/dto/HeavyResourceAddressOnly.java

@@ -0,0 +1,31 @@
+package com.baeldung.sampleapp.web.dto;
+
+
+public class HeavyResourceAddressOnly {
+    private Integer id;
+    private String address;
+
+    public HeavyResourceAddressOnly() {
+    }
+
+    public HeavyResourceAddressOnly(Integer id, String address) {
+        this.id = id;
+        this.address = address;
+    }
+
+    public Integer getId() {
+        return id;
+    }
+
+    public void setId(Integer id) {
+        this.id = id;
+    }
+
+    public String getAddress() {
+        return address;
+    }
+
+    public void setAddress(String address) {
+        this.address = address;
+    }
+}

spring-rest/src/main/java/com/baeldung/sampleapp/web/dto/HeavyResourceAddressPartialUpdate.java

@@ -0,0 +1,31 @@
+package com.baeldung.sampleapp.web.dto;
+
+
+public class HeavyResourceAddressPartialUpdate {
+    private Integer id;
+    private String address;
+
+    public HeavyResourceAddressPartialUpdate() {
+    }
+
+    public HeavyResourceAddressPartialUpdate(Integer id, String address) {
+        this.id = id;
+        this.address = address;
+    }
+
+    public Integer getId() {
+        return id;
+    }
+
+    public void setId(Integer id) {
+        this.id = id;
+    }
+
+    public String getAddress() {
+        return address;
+    }
+
+    public void setAddress(String address) {
+        this.address = address;
+    }
+}

spring-rest/src/main/java/com/baeldung/sampleapp/web/dto/Item.java

@@ -0,0 +1,36 @@
+package com.baeldung.sampleapp.web.dto;
+
+import com.fasterxml.jackson.annotation.JsonView;
+
+public class Item {
+    @JsonView(Views.Public.class)
+    public int id;
+
+    @JsonView(Views.Public.class)
+    public String itemName;
+
+    @JsonView(Views.Internal.class)
+    public String ownerName;
+
+    public Item() {
+        super();
+    }
+
+    public Item(final int id, final String itemName, final String ownerName) {
+        this.id = id;
+        this.itemName = itemName;
+        this.ownerName = ownerName;
+    }
+
+    public int getId() {
+        return id;
+    }
+
+    public String getItemName() {
+        return itemName;
+    }
+
+    public String getOwnerName() {
+        return ownerName;
+    }
+}

spring-rest/src/main/java/com/baeldung/sampleapp/web/dto/ItemManager.java

@@ -0,0 +1,9 @@
+package com.baeldung.sampleapp.web.dto;
+
+public class ItemManager {
+
+    public static Item getById(final int id) {
+        final Item item = new Item(2, "book", "John");
+        return item;
+    }
+}

spring-rest/src/main/java/com/baeldung/sampleapp/web/dto/PactDto.java

@@ -0,0 +1,33 @@
+package com.baeldung.sampleapp.web.dto;
+
+public class PactDto {
+
+    private boolean condition;
+    private String name;
+
+    public PactDto() {
+    }
+
+    public PactDto(boolean condition, String name) {
+        super();
+        this.condition = condition;
+        this.name = name;
+    }
+
+    public boolean isCondition() {
+        return condition;
+    }
+
+    public void setCondition(boolean condition) {
+        this.condition = condition;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+}

spring-rest/src/main/java/com/baeldung/sampleapp/web/dto/Views.java

@@ -0,0 +1,9 @@
+package com.baeldung.sampleapp.web.dto;
+
+public class Views {
+    public static class Public {
+    }
+
+    public static class Internal extends Public {
+    }
+}

spring-rest/src/main/java/com/baeldung/sampleapp/web/exception/ResourceNotFoundException.java

@@ -0,0 +1,8 @@
+package com.baeldung.sampleapp.web.exception;
+
+import org.springframework.http.HttpStatus;
+import org.springframework.web.bind.annotation.ResponseStatus;
+
+@ResponseStatus(value = HttpStatus.NOT_FOUND)
+public class ResourceNotFoundException extends RuntimeException {
+}

spring-rest/src/main/java/com/baeldung/transfer/LoginForm.java

@@ -0,0 +1,31 @@
+package com.baeldung.transfer;
+
+public class LoginForm {
+    private String username;
+    private String password;
+
+    public LoginForm() {
+    }
+
+    public LoginForm(String username, String password) {
+        super();
+        this.username = username;
+        this.password = password;
+    }
+    
+    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;
+    }
+}

spring-rest/src/main/java/com/baeldung/web/log/app/Application.java

@@ -0,0 +1,17 @@
+package com.baeldung.web.log.app;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.context.annotation.ComponentScan;
+import org.springframework.boot.web.servlet.support.SpringBootServletInitializer;
+
+@EnableAutoConfiguration
+@ComponentScan("com.baeldung.web.log")
+@SpringBootApplication
+public class Application extends SpringBootServletInitializer {
+
+    public static void main(final String[] args) {
+        SpringApplication.run(Application.class, args);
+    }
+}

spring-rest/src/main/java/com/baeldung/web/log/app/TaxiFareRequestInterceptor.java

@@ -0,0 +1,44 @@
+package com.baeldung.web.log.app;
+
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.stereotype.Component;
+import org.springframework.web.servlet.handler.HandlerInterceptorAdapter;
+import org.springframework.web.util.ContentCachingRequestWrapper;
+
+import com.baeldung.web.log.util.RequestLoggingUtil;
+
+@Component
+public class TaxiFareRequestInterceptor extends HandlerInterceptorAdapter {
+
+    private final static Logger LOGGER = LoggerFactory.getLogger(TaxiFareRequestInterceptor.class);
+
+    @Override
+    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
+        String postData;
+        HttpServletRequest requestCacheWrapperObject = null;
+        try {
+            // Uncomment to produce the stream closed issue
+            // postData = RequestLoggingUtil.getStringFromInputStream(request.getInputStream());
+
+            // To overcome request stream closed issue
+            requestCacheWrapperObject = new ContentCachingRequestWrapper(request);
+            requestCacheWrapperObject.getParameterMap();
+        } catch (Exception exception) {
+            exception.printStackTrace();
+        } finally {
+            postData = RequestLoggingUtil.readPayload(requestCacheWrapperObject);
+            LOGGER.info("REQUEST DATA: " + postData);
+        }
+        return true;
+    }
+
+    @Override
+    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
+        LOGGER.info("RESPONSE: " + response.getStatus());
+    }
+
+}

spring-rest/src/main/java/com/baeldung/web/log/config/RequestLoggingFilterConfig.java

@@ -0,0 +1,20 @@
+package com.baeldung.web.log.config;
+
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.web.filter.CommonsRequestLoggingFilter;
+
+@Configuration
+public class RequestLoggingFilterConfig {
+
+    @Bean
+    public CommonsRequestLoggingFilter logFilter() {
+        CommonsRequestLoggingFilter filter = new CommonsRequestLoggingFilter();
+        filter.setIncludeQueryString(true);
+        filter.setIncludePayload(true);
+        filter.setMaxPayloadLength(10000);
+        filter.setIncludeHeaders(false);
+        filter.setAfterMessagePrefix("REQUEST DATA : ");
+        return filter;
+    }
+}

spring-rest/src/main/java/com/baeldung/web/log/config/TaxiFareMVCConfig.java

@@ -0,0 +1,19 @@
+package com.baeldung.web.log.config;
+
+import com.baeldung.web.log.app.TaxiFareRequestInterceptor;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
+import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
+
+@Configuration
+public class TaxiFareMVCConfig implements WebMvcConfigurer {
+
+    @Autowired
+    private TaxiFareRequestInterceptor taxiFareRequestInterceptor;
+
+    @Override
+    public void addInterceptors(InterceptorRegistry registry) {
+        registry.addInterceptor(taxiFareRequestInterceptor).addPathPatterns("/**/taxifare/**/");
+    }
+}

spring-rest/src/main/java/com/baeldung/web/log/controller/TaxiFareController.java

@@ -0,0 +1,40 @@
+package com.baeldung.web.log.controller;
+
+import javax.validation.Valid;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestBody;
+
+import com.baeldung.web.log.data.RateCard;
+import com.baeldung.web.log.data.TaxiRide;
+import com.baeldung.web.log.service.TaxiFareCalculatorService;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+public class TaxiFareController {
+
+    @Autowired
+    private TaxiFareCalculatorService taxiFareCalculatorService;
+    
+    private static final Logger LOGGER = LoggerFactory.getLogger(TaxiFareController.class);
+    
+    @GetMapping("/taxifare/get/")
+    public RateCard getTaxiFare() {
+        LOGGER.debug("getTaxiFare() - START");
+        return new RateCard();
+    }
+    
+    @PostMapping("/taxifare/calculate/")
+    public String calculateTaxiFare(@RequestBody @Valid TaxiRide taxiRide) {
+        LOGGER.debug("calculateTaxiFare() - START");
+        String totalFare = taxiFareCalculatorService.calculateFare(taxiRide);
+        LOGGER.debug("calculateTaxiFare() - Total Fare : {}",totalFare);
+        LOGGER.debug("calculateTaxiFare() - END");
+        return totalFare;
+    }
+
+}

spring-rest/src/main/java/com/baeldung/web/log/data/RateCard.java

@@ -0,0 +1,31 @@
+package com.baeldung.web.log.data;
+
+public class RateCard {
+
+    private String nightSurcharge;
+    private String ratePerMile;
+
+    public RateCard() {
+        nightSurcharge = "Extra $ 100";
+        ratePerMile = "$ 10 Per Mile";
+    }
+
+
+    public String getNightSurcharge() {
+        return nightSurcharge;
+    }
+
+    public void setNightSurcharge(String nightSurcharge) {
+        this.nightSurcharge = nightSurcharge;
+    }
+
+    public String getRatePerMile() {
+        return ratePerMile;
+    }
+
+    public void setRatePerMile(String ratePerMile) {
+        this.ratePerMile = ratePerMile;
+    }
+
+
+}

spring-rest/src/main/java/com/baeldung/web/log/data/TaxiRide.java

@@ -0,0 +1,33 @@
+package com.baeldung.web.log.data;
+
+public class TaxiRide {
+
+    private Boolean isNightSurcharge;
+    private Long distanceInMile;
+
+    public TaxiRide() {
+    }
+
+    public TaxiRide(Boolean isNightSurcharge, Long distanceInMile) {
+        this.isNightSurcharge = isNightSurcharge;
+        this.distanceInMile = distanceInMile;
+    }
+
+
+    public Boolean getIsNightSurcharge() {
+        return isNightSurcharge;
+    }
+
+    public void setIsNightSurcharge(Boolean isNightSurcharge) {
+        this.isNightSurcharge = isNightSurcharge;
+    }
+
+    public Long getDistanceInMile() {
+        return distanceInMile;
+    }
+
+    public void setDistanceInMile(Long distanceInMile) {
+        this.distanceInMile = distanceInMile;
+    }
+
+}

spring-rest/src/main/java/com/baeldung/web/log/service/TaxiFareCalculatorService.java

@@ -0,0 +1,14 @@
+package com.baeldung.web.log.service;
+
+import com.baeldung.web.log.data.TaxiRide;
+import org.springframework.stereotype.Service;
+
+@Service
+public class TaxiFareCalculatorService {
+
+    public String calculateFare(TaxiRide taxiRide) {
+        return String.valueOf((Long) (taxiRide.getIsNightSurcharge()
+          ? taxiRide.getDistanceInMile() * 10 + 100
+          : taxiRide.getDistanceInMile() * 10));
+    }
+}

spring-rest/src/main/java/com/baeldung/web/log/util/RequestLoggingUtil.java

@@ -0,0 +1,38 @@
+package com.baeldung.web.log.util;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.StringWriter;
+
+import javax.servlet.http.HttpServletRequest;
+
+import org.apache.commons.io.IOUtils;
+import org.springframework.web.util.ContentCachingRequestWrapper;
+import org.springframework.web.util.WebUtils;
+
+public class RequestLoggingUtil {
+
+    public static String getStringFromInputStream(InputStream is) {
+        StringWriter writer = new StringWriter();
+        String encoding = "UTF-8";
+        try {
+            IOUtils.copy(is, writer, encoding);
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+        return writer.toString();
+    }
+
+    public static String readPayload(final HttpServletRequest request) throws IOException {
+        String payloadData = null;
+        ContentCachingRequestWrapper contentCachingRequestWrapper = WebUtils.getNativeRequest(request, ContentCachingRequestWrapper.class);
+        if (null != contentCachingRequestWrapper) {
+            byte[] buf = contentCachingRequestWrapper.getContentAsByteArray();
+            if (buf.length > 0) {
+                payloadData = new String(buf, 0, buf.length, contentCachingRequestWrapper.getCharacterEncoding());
+            }
+        }
+        return payloadData;
+    }
+
+}

spring-rest/src/main/java/com/baeldung/web/upload/app/UploadApplication.java

@@ -0,0 +1,17 @@
+package com.baeldung.web.upload.app;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.boot.web.servlet.support.SpringBootServletInitializer;
+import org.springframework.context.annotation.ComponentScan;
+
+@EnableAutoConfiguration
+@ComponentScan("com.baeldung.web.upload")
+@SpringBootApplication
+public class UploadApplication extends SpringBootServletInitializer {
+
+    public static void main(final String[] args) {
+        SpringApplication.run(UploadApplication.class, args);
+    }
+}

spring-rest/src/main/java/com/baeldung/web/upload/client/MultipartFileUploadClient.java

@@ -0,0 +1,61 @@
+package com.baeldung.web.upload.client;
+
+import org.springframework.core.io.FileSystemResource;
+import org.springframework.core.io.Resource;
+import org.springframework.http.HttpEntity;
+import org.springframework.http.HttpHeaders;
+import org.springframework.http.MediaType;
+import org.springframework.http.ResponseEntity;
+import org.springframework.util.LinkedMultiValueMap;
+import org.springframework.util.MultiValueMap;
+import org.springframework.web.client.RestTemplate;
+
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Path;
+
+public class MultipartFileUploadClient {
+
+    public static void main(String[] args) throws IOException {
+        uploadSingleFile();
+        uploadMultipleFile();
+    }
+
+    private static void uploadSingleFile() throws IOException {
+        HttpHeaders headers = new HttpHeaders();
+        headers.setContentType(MediaType.MULTIPART_FORM_DATA);
+
+        MultiValueMap<String, Object> body = new LinkedMultiValueMap<>();
+        body.add("file", getTestFile());
+
+
+        HttpEntity<MultiValueMap<String, Object>> requestEntity = new HttpEntity<>(body, headers);
+        String serverUrl = "http://localhost:8082/spring-rest/fileserver/singlefileupload/";
+        RestTemplate restTemplate = new RestTemplate();
+        ResponseEntity<String> response = restTemplate.postForEntity(serverUrl, requestEntity, String.class);
+        System.out.println("Response code: " + response.getStatusCode());
+    }
+
+    private static void uploadMultipleFile() throws IOException {
+        HttpHeaders headers = new HttpHeaders();
+        headers.setContentType(MediaType.MULTIPART_FORM_DATA);
+
+        MultiValueMap<String, Object> body = new LinkedMultiValueMap<>();
+        body.add("files", getTestFile());
+        body.add("files", getTestFile());
+        body.add("files", getTestFile());
+
+        HttpEntity<MultiValueMap<String, Object>> requestEntity = new HttpEntity<>(body, headers);
+        String serverUrl = "http://localhost:8082/spring-rest/fileserver/multiplefileupload/";
+        RestTemplate restTemplate = new RestTemplate();
+        ResponseEntity<String> response = restTemplate.postForEntity(serverUrl, requestEntity, String.class);
+        System.out.println("Response code: " + response.getStatusCode());
+    }
+
+    public static Resource getTestFile() throws IOException {
+        Path testFile = Files.createTempFile("test-file", ".txt");
+        System.out.println("Creating and Uploading Test File: " + testFile);
+        Files.write(testFile, "Hello World !!, This is a test file.".getBytes());
+        return new FileSystemResource(testFile.toFile());
+    }
+}

spring-rest/src/main/java/com/baeldung/web/upload/controller/FileServerResource.java

@@ -0,0 +1,43 @@
+package com.baeldung.web.upload.controller;
+
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RequestMethod;
+import org.springframework.web.bind.annotation.RequestParam;
+import org.springframework.web.bind.annotation.RestController;
+import org.springframework.web.multipart.MultipartFile;
+
+import java.io.IOException;
+import java.util.List;
+
+@RestController
+@RequestMapping("/fileserver")
+public class FileServerResource {
+
+    @RequestMapping(path = "/singlefileupload/", method = RequestMethod.POST)
+    public ResponseEntity<String> processFile(@RequestParam("file") MultipartFile file) throws IOException {
+
+        byte[] bytes = file.getBytes();
+
+        System.out.println("File Name: " + file.getOriginalFilename());
+        System.out.println("File Content Type: " + file.getContentType());
+        System.out.println("File Content:\n" + new String(bytes));
+
+        return (new ResponseEntity<>("Successful", null, HttpStatus.OK));
+    }
+
+    @RequestMapping(path = "/multiplefileupload/", method = RequestMethod.POST)
+    public ResponseEntity<String> processFile(@RequestParam("files") List<MultipartFile> files) throws IOException {
+
+        for (MultipartFile file : files) {
+            byte[] bytes = file.getBytes();
+
+            System.out.println("File Name: " + file.getOriginalFilename());
+            System.out.println("File Content Type: " + file.getContentType());
+            System.out.println("File Content:\n" + new String(bytes));
+        }
+
+        return (new ResponseEntity<>("Successful", null, HttpStatus.OK));
+    }
+}

spring-rest/src/main/resources/application.properties

@@ -0,0 +1,2 @@
+server.port= 8082
+server.servlet.context-path=/spring-rest

spring-rest/src/main/resources/com/baeldung/produceimage/data.txt

@@ -0,0 +1 @@
+This is a sample file containing text data

spring-rest/src/main/resources/logback.xml

@@ -0,0 +1,23 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<configuration>
+    <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
+        <encoder>
+            <pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n
+            </pattern>
+        </encoder>
+    </appender>
+    
+    <logger name="org.springframework.web.filter.CommonsRequestLoggingFilter">
+		<level value="DEBUG" />
+	</logger>
+
+    <logger name="org.springframework" level="WARN" />
+    <logger name="org.springframework.transaction" level="WARN" />
+
+    <!-- in order to debug some marshalling issues, this needs to be TRACE -->
+    <logger name="org.springframework.web.servlet.mvc" level="WARN" />
+
+    <root level="INFO">
+        <appender-ref ref="STDOUT" />
+    </root>
+</configuration>

spring-rest/src/main/resources/pacts/test_consumer-test_provider.json

@@ -0,0 +1,61 @@
+{
+    "provider": {
+        "name": "test_provider"
+    },
+    "consumer": {
+        "name": "test_consumer"
+    },
+    "interactions": [
+        {
+            "description": "GET REQUEST",
+            "request": {
+                "method": "GET",
+                "path": "/pact"
+            },
+            "response": {
+                "status": 200,
+                "headers": {
+                    "Content-Type": "application/json"
+                },
+                "body": {
+                    "condition": true,
+                    "name": "tom"
+                }
+            },
+            "providerStates": [
+                {
+                    "name": "test GET"
+                }
+            ]
+        },
+        {
+            "description": "POST REQUEST",
+            "request": {
+                "method": "POST",
+                "path": "/pact",
+                "headers": {
+                    "Content-Type": "application/json"
+                },
+                "body": {
+                    "name": "Michael"
+                }
+            },
+            "response": {
+                "status": 201
+            },
+            "providerStates": [
+                {
+                    "name": "test POST"
+                }
+            ]
+        }
+    ],
+    "metadata": {
+        "pact-specification": {
+            "version": "3.0.0"
+        },
+        "pact-jvm": {
+            "version": "3.5.0"
+        }
+    }
+}

spring-rest/src/main/webapp/WEB-INF/api-servlet.xml

@@ -0,0 +1,44 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<beans xmlns="http://www.springframework.org/schema/beans" xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xmlns:context="http://www.springframework.org/schema/context"
+    xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd 
+    http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd 
+    http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd"
+>
+
+    <context:component-scan base-package="com.baeldung.sampleapp.web" />
+
+    <mvc:annotation-driven content-negotiation-manager="contentNegotiationManager" >
+        <mvc:message-converters register-defaults="true">
+           <bean class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter"/>
+<!-- <bean class="org.springframework.http.converter.protobuf.ProtobufHttpMessageConverter"/>         -->      
+  </mvc:message-converters>
+    </mvc:annotation-driven>
+    
+
+    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver" />
+    <bean class="org.springframework.web.servlet.view.XmlViewResolver">
+        <property name="location">
+            <value>/WEB-INF/spring-views.xml</value>
+        </property>
+        <property name="order" value="0" />
+    </bean>
+
+    <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
+        <!-- max upload size in bytes -->
+        <property name="maxUploadSize" value="20971520" /> <!-- 20MB -->
+
+        <!-- max size of file in memory (in bytes) -->
+        <property name="maxInMemorySize" value="1048576" /> <!-- 1MB -->
+
+    </bean>
+    
+    <bean id="contentNegotiationManager"
+             class="org.springframework.web.accept.ContentNegotiationManagerFactoryBean">
+       <property name="defaultContentType" value="application/json" />
+  </bean>
+
+
+</beans>
+
+

spring-rest/src/main/webapp/WEB-INF/company.html

@@ -0,0 +1,44 @@
+<!DOCTYPE html>
+<html>
+	<head>
+		<meta charset="ISO-8859-1">
+		<title>Company Data</title>
+		<script src="https://code.jquery.com/jquery-3.1.0.js"
+			integrity="sha256-slogkvB1K3VOkzAI8QITxV3VzpOnkeNVsKvtkYLMjfk="
+			crossorigin="anonymous"></script>
+		<script>
+			$(document).ready(function(){
+				$('#REST-button').click(function() {
+				   $.ajax({
+				      url: 'http://localhost:8080/spring-rest/companyRest?callback=getCompanyData',
+				      data: {
+				         format: 'json'
+				      },
+					  type: 'GET',
+					  jsonpCallback:'getCompanyData',
+					  dataType: 'jsonp',
+				      error: function() {
+				         $('#infoREST').html('<p>An error has occurred</p>');
+				      },
+				      success: function(data) {
+						console.log("sucess");
+				      }
+				   });
+				});
+			});
+		
+		    function getCompanyData(data) { 
+				document.write("<b>ID:</b> "+data.id+"<br/>");	 
+				document.write("<b>NAME:</b> "+data.name+"<br/>");
+				document.write("<br/>");
+		     }
+	     </script>
+	</head>
+	<body>
+	
+		<!-- Using REST URL-->
+		<button id="REST-button">Test REST JSON-P!</button>
+		<div id="infoREST"></div>
+	
+	</body>
+</html>

spring-rest/src/main/webapp/WEB-INF/spring-views.xml

@@ -0,0 +1,10 @@
+<beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xsi:schemaLocation="http://www.springframework.org/schema/beans 
+	http://www.springframework.org/schema/beans/spring-beans-2.5.xsd"
+>
+
+    <bean id="RedirectedUrl" class="org.springframework.web.servlet.view.RedirectView">
+        <property name="url" value="redirectedUrl" />
+    </bean>
+
+</beans>

spring-rest/src/main/webapp/WEB-INF/web.xml

@@ -0,0 +1,41 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
+    xsi:schemaLocation="
+      http://java.sun.com/xml/ns/javaee
+      http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0"
+>
+
+    <display-name>Spring MVC Application</display-name>
+
+    <!-- Spring root -->
+     <context-param>
+        <param-name>contextClass</param-name>
+        <param-value>
+        	org.springframework.web.context.support.AnnotationConfigWebApplicationContext
+      	</param-value>
+    </context-param>
+    <context-param>
+        <param-name>contextConfigLocation</param-name>
+        <param-value>com.baeldung.sampleapp.config</param-value>
+    </context-param>
+ 
+<!--     <listener>
+        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
+    </listener>
+ -->
+    <!-- Spring child -->
+    <servlet>
+        <servlet-name>api</servlet-name>
+        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
+        <load-on-startup>1</load-on-startup>
+    </servlet>
+    <servlet-mapping>
+        <servlet-name>api</servlet-name>
+        <url-pattern>/</url-pattern>
+    </servlet-mapping>
+
+    <welcome-file-list>
+        <welcome-file/>
+    </welcome-file-list>
+
+</web-app>