Content Negotiation Strategy

spring-mvc-java/pom.xml

@@ -99,6 +99,19 @@
             <artifactId>thymeleaf</artifactId>
             <version>${thymeleaf.version}</version>
         </dependency>
+        
+         <!-- Json conversion -->
+		<dependency>
+			<groupId>com.fasterxml.jackson.core</groupId>
+			<artifactId>jackson-core</artifactId>
+			<version>2.1.2</version>
+		</dependency>
+		<dependency>
+			<groupId>com.fasterxml.jackson.core</groupId>
+			<artifactId>jackson-databind</artifactId>
+			<version>2.1.2</version>
+		</dependency>
+		
     </dependencies>
 
     <build>

spring-mvc-java/src/main/java/org/baeldung/model/Employee.java

@@ -0,0 +1,51 @@
+package org.baeldung.model;
+
+import javax.xml.bind.annotation.XmlRootElement;
+
+@XmlRootElement
+public class Employee {
+
+    private long id;
+    private String name;
+    private String contactNumber;
+
+    public Employee() {
+        super();
+    }
+
+    public Employee(final long id, final String name, final String contactNumber) {
+        this.id = id;
+        this.name = name;
+        this.contactNumber = contactNumber;
+    }
+
+    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;
+    }
+
+    public String getContactNumber() {
+        return contactNumber;
+    }
+
+    public void setContactNumber(final String contactNumber) {
+        this.contactNumber = contactNumber;
+    }
+
+    @Override
+    public String toString() {
+        return "Employee [id=" + id + ", name=" + name + ", contactNumber=" + contactNumber + "]";
+    }
+
+}

spring-mvc-java/src/main/java/org/baeldung/spring/web/config/ContentManagementWebConfig.java

@@ -0,0 +1,53 @@
+package org.baeldung.spring.web.config;
+
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.http.MediaType;
+import org.springframework.web.servlet.ViewResolver;
+import org.springframework.web.servlet.config.annotation.ContentNegotiationConfigurer;
+import org.springframework.web.servlet.config.annotation.EnableWebMvc;
+import org.springframework.web.servlet.config.annotation.ViewControllerRegistry;
+import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;
+import org.springframework.web.servlet.view.InternalResourceViewResolver;
+import org.springframework.web.servlet.view.JstlView;
+
+@EnableWebMvc
+@Configuration
+public class ContentManagementWebConfig extends WebMvcConfigurerAdapter {
+
+    public ContentManagementWebConfig() {
+        super();
+    }
+
+    // API
+
+    @Override
+    public void configureContentNegotiation(final ContentNegotiationConfigurer configurer) {
+        configurer.favorPathExtension(true).
+        favorParameter(false).
+        parameterName("mediaType").
+        ignoreAcceptHeader(true).
+        useJaf(false).
+        defaultContentType(MediaType.TEXT_HTML).
+        mediaType("xml", MediaType.APPLICATION_XML).
+        mediaType("html", MediaType.TEXT_HTML).
+        mediaType("json", MediaType.APPLICATION_JSON);
+    }
+
+    @Override
+    public void addViewControllers(final ViewControllerRegistry registry) {
+        super.addViewControllers(registry);
+        registry.addViewController("/sample.html");
+    }
+
+    @Bean
+    public ViewResolver viewResolver() {
+        final InternalResourceViewResolver bean = new InternalResourceViewResolver();
+        bean.setViewClass(JstlView.class);
+        bean.setPrefix("/WEB-INF/view/");
+        bean.setSuffix(".jsp");
+        bean.setOrder(0);
+        return bean;
+    }
+
+}

spring-mvc-java/src/main/java/org/baeldung/web/controller/EmployeeController.java

@@ -0,0 +1,55 @@
+package org.baeldung.web.controller;
+
+import java.util.HashMap;
+import java.util.Map;
+
+import org.baeldung.model.Employee;
+import org.springframework.stereotype.Controller;
+import org.springframework.ui.ModelMap;
+import org.springframework.validation.BindingResult;
+import org.springframework.web.bind.annotation.ModelAttribute;
+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.servlet.ModelAndView;
+
+@Controller
+public class EmployeeController {
+
+    Map<Long, Employee> employeeMap = new HashMap<>();
+
+    @RequestMapping(value = "/employee", method = RequestMethod.GET)
+    public ModelAndView showForm() {
+        return new ModelAndView("employeeHome", "employee", new Employee());
+    }
+
+    @RequestMapping(value = "/employee/{Id}", produces = { "application/json", "application/xml" }, method = RequestMethod.GET)
+    public @ResponseBody Employee getEmployeeById(@PathVariable final long Id) {
+        return employeeMap.get(Id);
+    }
+
+    @RequestMapping(value = "/employee/{Id}", method = RequestMethod.GET)
+    public String getEmployeeByIdHtmlView(@PathVariable final long Id, final ModelMap model) {
+        model.addAttribute("name", employeeMap.get(Id).getName());
+        model.addAttribute("contactNumber", employeeMap.get(Id).getContactNumber());
+        model.addAttribute("id", employeeMap.get(Id).getId());
+
+        return "employeeView";
+    }
+
+    @RequestMapping(value = "/addEmployee", method = RequestMethod.POST)
+    public String submit(@ModelAttribute("employee") final Employee employee, final BindingResult result, final ModelMap model) {
+        if (result.hasErrors()) {
+            return "error";
+        }
+        model.addAttribute("name", employee.getName());
+        model.addAttribute("contactNumber", employee.getContactNumber());
+        model.addAttribute("id", employee.getId());
+
+        employeeMap.put(employee.getId(), employee);
+
+        return "employeeView";
+    }
+
+}

spring-mvc-java/src/main/webapp/WEB-INF/view/employeeHome.jsp

@@ -0,0 +1,33 @@
+<%@ page language="java" contentType="text/html; charset=ISO-8859-1" pageEncoding="ISO-8859-1"%>
+<%@ taglib prefix="form" uri="http://www.springframework.org/tags/form"%>
+<html>
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
+<title>Form Example - Register an Employee</title>
+</head>
+<body>
+	<h3>Welcome, Enter The Employee Details</h3>
+
+	<form:form method="POST" action="/spring-mvc-java/addEmployee" modelAttribute="employee">
+		<table>
+			<tr>
+				<td><form:label path="name">Name</form:label></td>
+				<td><form:input path="name" /></td>
+			</tr>
+			<tr>
+				<td><form:label path="id">Id</form:label></td>
+				<td><form:input path="id" /></td>
+			</tr>
+			<tr>
+				<td><form:label path="contactNumber">Contact Number</form:label></td>
+				<td><form:input path="contactNumber" /></td>
+			</tr>
+			<tr>
+				<td><input type="submit" value="Submit" /></td>
+			</tr>
+		</table>
+	</form:form>
+
+</body>
+
+</html>

spring-mvc-java/src/main/webapp/WEB-INF/view/employeeView.jsp

@@ -0,0 +1,24 @@
+<%@taglib uri="http://www.springframework.org/tags/form" prefix="form"%>
+<html>
+<head>
+<title>Spring MVC Form Handling</title>
+</head>
+<body>
+
+	<h2>Submitted Employee Information</h2>
+	<table>
+		<tr>
+			<td>Name :</td>
+			<td>${name}</td>
+		</tr>
+		<tr>
+			<td>ID :</td>
+			<td>${id}</td>
+		</tr>
+		<tr>
+			<td>Contact Number :</td>
+			<td>${contactNumber}</td>
+		</tr>
+	</table>
+</body>
+</html>