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 JSON > JSON LIB > JSON Object to Bean

JSON Object to Bean 

JSON-lib is a java library for serializing and de-serializing java beans, maps, arrays and collections in JSON format. Get the latest binaries from sourceforge http://json-lib.sourceforge.net/. This requires the libraries ( json-lib-2.4-jdk15.jar, xom-1.2.7.jar, ezmorph.jar commons-lang.jar, commons-collections.jar, commons-beanutils-1.7.jar and commons-logging-1.1.1.jar) to be in classpath. The following example shows converting a JSON object to Bean.

File Name  :  
com/bethecoder/tutorials/json_lib/common/Student.java 
   
package com.bethecoder.tutorials.json_lib.common;

import java.util.Date;

public class Student {
  private String firstName;
  private String lastName;
  private int age;
  private String hobby;
  private Date dob;

  public Student() {
  }

  public Student(String firstName, String lastName, int age, String hobby,
      Date dob) {
    super();
    this.firstName = firstName;
    this.lastName = lastName;
    this.age = age;
    this.hobby = hobby;
    this.dob = dob;
  }
  public String getFirstName() {
    return firstName;
  }
  public void setFirstName(String firstName) {
    this.firstName = firstName;
  }
  public String getLastName() {
    return lastName;
  }
  public void setLastName(String lastName) {
    this.lastName = lastName;
  }
  public int getAge() {
    return age;
  }
  public void setAge(int age) {
    this.age = age;
  }
  public String getHobby() {
    return hobby;
  }

  public void setHobby(String hobby) {
    this.hobby = hobby;
  }
  public Date getDob() {
    return dob;
  }
  public void setDob(Date dob) {
    this.dob = dob;
  }

  public String toString() {
    return "Student[ " +
      "firstName = " + firstName +
      ", lastName = " + lastName +
      ", age = " + age +
      ", hobby = " + hobby +
      ", dob = " + dob +
      " ]";
  }
}
   

File Name  :  
com/bethecoder/tutorials/json_lib/tests/Json2Bean.java 
Author  :  Sudhakar KV
Email  :  kvenkatasudhakar@gmail.com
   
package com.bethecoder.tutorials.json_lib.tests;

import java.util.Date;
import net.sf.json.JSONObject;
import com.bethecoder.tutorials.json_lib.common.Student;

public class Json2Bean {

  /**
   @param args
   */
  public static void main(String[] args) {
    Student stud = new Student("Sriram""Kasireddi"2"Singing"new Date(11046));
    JSONObject obj = JSONObject.fromObject(stud);      //BEAN to JSON
    System.out.println(obj.toString(2))//pretty print with indent
    
    stud = (StudentJSONObject.toBean(obj, Student.class);  //JSON to BEAN
    System.out.println(stud.toString());
  }

}
   

It gives the following output,
{
  "age": 2,
  "dob":   {
    "date": 6,
    "day": 4,
    "hours": 0,
    "minutes": 0,
    "month": 4,
    "seconds": 0,
    "time": 1273084200000,
    "timezoneOffset": -330,
    "year": 110
  },
  "firstName": "Sriram",
  "hobby": "Singing",
  "lastName": "Kasireddi"
}

Student[ firstName = Sriram, lastName = Kasireddi, 
	age = 2, hobby = Singing, dob = Thu May 06 00:00:00 IST 2010 ]


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