How to Convert Object to JSON using GSON API

on November 16, 2016

Post Views: 1,368

Convert Object to JSON using GSON

In this tutorial, I am attaching simple program flow about How to Convert Object to JSON using GSON API. The example program were shared in the same post.

Employee.java

package com.dineshkrish.gson;
public class Employee {
private int employeeId;
private String employeeName;
private int employeeAge;
private String employeeGender;
private String employeeAddress;
public int getemployeeId() {
return employeeId;
}
public void setemployeeId(int employeeId) {
this.employeeId = employeeId;
}
public String getemployeeName() {
return employeeName;
}
public void setemployeeName(String employeeName) {
this.employeeName = employeeName;
}
public int getemployeeAge() {
return employeeAge;
}
public void setemployeeAge(int employeeAge) {
this.employeeAge = employeeAge;
}
public String getemployeeGender() {
return employeeGender;
}
public void setemployeeGender(String employeeGender) {
this.employeeGender = employeeGender;
}
public String getemployeeAddress() {
return employeeAddress;
}
public void setemployeeAddress(String employeeAddress) {
this.employeeAddress = employeeAddress;
}
}

ObjectToJSON.java

package com.dineshkrish.gson;
import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import com.google.gson.Gson;
public class ObjectToJSON {
public static void main(String[] args) {
// Defining Gson Object
Gson gson = new Gson();
// Creating File Object for output JSON file
File outputJsonFile = new File("employee.json");
// FileWrite to write Json data on file
FileWriter fw = null;
// Defining Employee Object
Employee employee = new Employee();
employee.setemployeeId(1001);
employee.setemployeeName("Dinesh Krishnan");
employee.setemployeeAge(30);
employee.setemployeeGender("Male");
employee.setemployeeAddress("India");
try {
fw = new FileWriter(outputJsonFile);
// Covert Object to JSON using GSON API
gson.toJson(employee, fw);
fw.close();
System.out.println("Converted Successfully...");
} catch (IOException e) {
System.out.println(e.getMessage());
e.printStackTrace();
}
}
}