Convert Java Object to JSON

This post is in continuation with the post - Convert JSON to Java object

Convert Java object data to JSON  using - Jackson 2

package com.javainstance;

import java.io.File;

import java.io.IOException;

import java.util.ArrayList;

import java.util.List;

import com.fasterxml.jackson.core.JsonGenerationException;

import com.fasterxml.jackson.databind.JsonMappingException;

import com.fasterxml.jackson.databind.ObjectMapper;

/**

 * @author javainstance

 *

 */

public class ObjectToJson {

public static void main(String[] args) {

Student student = new Student();

student.setStudentId(5);

student.setStudentName("Jain");

student.setStudentAge(18);

List<String> subjects = new ArrayList<>();

subjects.add("Geography");

subjects.add("History");

student.setSubjects(subjects);

ObjectMapper objectMapper = new ObjectMapper();

File file = new File("D://Workspace1//JSON//src//studentrec.json");

try {

objectMapper.writeValue(file, student);

} catch (JsonGenerationException e) {

// TODO Auto-generated catch block

e.printStackTrace();

} catch (JsonMappingException e) {

// TODO Auto-generated catch block

e.printStackTrace();

} catch (IOException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

}

}

Output:

studentrec.json

{"studentId":5,"studentName":"Jain","studentAge":18,"subjects":["Geography","History"]}

Download Complete Code from Github

References:

http://www.json.org/

Convert JSON to Java object

Give you suggestion in comments.If you like the post Share with your friends on social network.

You may be interested in:  File upload and download program in Java.