Java Tutorials Corner: JSON Pretty Print using GSON

JSON Pretty Print using GSON

In this tutorial we are going to see how to Create Pretty Print JSON String using GSON.
1. Create project called JSONExample.
2. Create package called com.javatutorialscorner.gson
3. Create java class called GsonPojo under com.javatutorialscorner.gson.
GsonPojo.java

package com.javatutorialscorner.gson;

import java.util.List;

public class GsonPojo {

 private int var1 = 10;
 private String var2;
 private List<String> list;

 public int getVar1() {
  return var1;
 }

 public void setVar1(int var1) {
  this.var1 = var1;
 }

 public String getVar2() {
  return var2;
 }

 public void setVar2(String var2) {
  this.var2 = var2;
 }

 public List<String> getList() {
  return list;
 }

 public void setList(List<String> list) {
  this.list = list;
 }
 


}

4. Now Create java class called GSONPrettyPrintExample under com.javatutorialscorner.gson.

GSONPrettyPrintExample.java

The setPrettyPrinting() method available in GsonBuilder class used to create Pretty Print JSON.

package com.javatutorialscorner.gson;

import java.util.ArrayList;
import java.util.List;

import com.google.gson.Gson;
import com.google.gson.GsonBuilder;

public class GSONPrettyPrintExample {

 /**
  * @param args
  */
 public static void main(String[] args) {
  // TODO Auto-generated method stub

  List<String> list = new ArrayList<String>();
  list.add("Java");
  list.add("Sevlet");
  list.add("JSP");
  list.add("JSF");
  list.add("Struts 1.x");
  list.add("Struts 2.x");
  list.add("Tiles");
  list.add("Spring");
  list.add("Hibernate");

  GsonPojo pojo = new GsonPojo();
  pojo.setVar1(10);
  pojo.setVar2("Java Tutorials Corner");
  pojo.setList(list);
  Gson gson = new Gson();
  String json = gson.toJson(pojo);

  System.out.println("Normal JSON : " + json);

  Gson gson2 = new GsonBuilder().setPrettyPrinting().create();

  String json2 = gson2.toJson(pojo);

  System.out.println("JSON Pretty Print : " + json2);

 }

}

Now run the program see the following output in console.

Normal JSON : {"var1":10,"var2":"Java Tutorials Corner","list":["Java","Sevlet","JSP","JSF","Struts 1.x","Struts 2.x","Tiles","Spring","Hibernate"]}
JSON Pretty Print : {
  "var1": 10,
  "var2": "Java Tutorials Corner",
  "list": [
    "Java",
    "Sevlet",
    "JSP",
    "JSF",
    "Struts 1.x",
    "Struts 2.x",
    "Tiles",
    "Spring",
    "Hibernate"
  ]
}