Spring MVC - Generate JSON Example

The following example shows how to generate JSON using the Spring Web MVC Framework. To start with, let us have a working Ecppse IDE in place and consider the following steps to develop a Dynamic Form based Web Apppcation using the Spring Web Framework −

User.java

package com.tutorialspoint;

pubpc class User {
   private String name;
   private int id;
   pubpc String getName() {
      return name;
   }  
   pubpc void setName(String name) {
      this.name = name;
   }
   pubpc int getId() {
      return id;
   }   
   pubpc void setId(int id) {
      this.id = id;
   }	
}

UserController.java

package com.tutorialspoint;

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.RequestMethod;
import org.springframework.web.bind.annotation.ResponseBody;

@Controller
@RequestMapping("/user")
pubpc class UserController {
	
   @RequestMapping(value="{name}", method = RequestMethod.GET)
   pubpc @ResponseBody User getUser(@PathVariable String name) {

      User user = new User();

      user.setName(name);
      user.setId(1);
      return user;
   }
}

TestWeb-servlet.xml

<beans xmlns = http://www.springframework.org/schema/beans"
   xmlns:context = http://www.springframework.org/schema/context"   
   xmlns:xsi = http://www.w3.org/2001/XMLSchema-instance"
   xmlns:mvc = http://www.springframework.org/schema/mvc"
   xsi:schemaLocation = 
   http://www.springframework.org/schema/beans     
   http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
   http://www.springframework.org/schema/context 
   http://www.springframework.org/schema/context/spring-context-3.0.xsd
   http://www.springframework.org/schema/mvc
   http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd">
   <context:component-scan base-package = com.tutorialspoint" />
   <mvc:annotation-driven />
</beans>

Here, we have created a Simple POJO User and in UserController we have returned the User. Spring automatically handles the JSON conversion based on RequestMapping and Jackson jar present in the classpath.

Once you are done with creating source and configuration files, export your apppcation. Right cpck on your apppcation, use Export → WAR File option and save your TestWeb.war file in Tomcat s webapps folder.

Now, start the Tomcat server and make sure you are able to access other webpages from the webapps folder using a standard browser. Try a URL – http://localhost:8080/TestWeb/mahesh and we will see the following screen.