Google Gson API: Object To JSON String Annotation @SerializedName("") - Java

Object to Json String

Java Json 2017

package com.gson.json;

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

public class ObjectToJsonString {

    public static void main(String a[]) {

        Employee emp = new Employee();
        emp.setEmpId(9999);
        emp.setName("Antonio");
        emp.setSalary(29000);
        emp.setDesignation("Manager");
        emp.setDepartment("Accounts");

        Gson gsonObj = new GsonBuilder().setPrettyPrinting().create();
        // converts object to json string
        String jsonStr = gsonObj.toJson(emp);
        System.out.println(jsonStr);
    }
}

class Employee {

    @SerializedName("emp_id")
    private int empId;

    @SerializedName("emp_name")
    private String name;

    private String designation;
    private String department;
    private int salary;

    public int getEmpId() {
        return empId;
    }

    public void setEmpId(int empId) {
        this.empId = empId;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getDesignation() {
        return designation;
    }

    public void setDesignation(String designation) {
        this.designation = designation;
    }

    public String getDepartment() {
        return department;
    }

    public void setDepartment(String department) {
        this.department = department;
    }

    public int getSalary() {
        return salary;
    }

    public void setSalary(int salary) {
        this.salary = salary;
    }
}

 Chú ý empId và name có @SerializedName("emp_id")  @SerializedName("emp_name")