POJO to JSON and JSON to POJO useing GSON api.

       
//POJO
package com.trail;

public class DataDTO {
 
 String name;
 String role;
 String ID;
 public String getName() {
  return name;
 }
 public void setName(String name) {
  this.name = name;
 }
 public String getRole() {
  return role;
 }
 public void setRole(String role) {
  this.role = role;
 }
 public String getID() {
  return ID;
 }
 public void setID(String iD) {
  ID = iD;
 }
 

}

Impl class..

       
package com.trail;

import com.google.gson.Gson;

public class TrailMain {

 public static void main(String args[]){
  
 DataDTO dataDTO=new DataDTO();
 //set data in POJO
 
 dataDTO.setID("1011");
 dataDTO.setName("Sky");
 dataDTO.setRole("Student");
 
 //make it to the JSON String By  useing GSON API
 Gson gson=new Gson();
 String jsonString=gson.toJson(dataDTO);
 
 /*
  * String jsonString contain the JSON data
  * like-{"name":"Sky","role":"Student","ID":"1011"}
  * */
  System.out.println(jsonString);
  
  
  //get data in POJO from JSON String
  
  DataDTO dataDTO2=gson.fromJson(jsonString,DataDTO.class);
 System.out.println(dataDTO2.getID());
 System.out.println(dataDTO2.getName());
 System.out.println(dataDTO2.getRole());
  
  
  
 }
 
 
}

set Gson.jar in classpath and Compile these code..It will Show Out put in Console

It will ....