BE THE CODER > JSON > FLEX JSON Examples > How to Deserialize JSON String to Java Object

Flexjson is a lightweight java library for serializing and de-serializing java beans, maps, arrays and collections in JSON format. Get the latest binaries from https://sourceforge.net/projects/flexjson/. This requires the library flexjson-2.1.jar to be in classpath. The following example shows how to Deserialize the given JSON String to a Java Object.

File Name :

com/bethecoder/tutorials/flexjson/common/Student.java


package com.bethecoder.tutorials.flexjson.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/flexjson/tests/DeserializeTest.java
Author :	Sudhakar KV
Email :	[email protected]


package com.bethecoder.tutorials.flexjson.tests;



import com.bethecoder.tutorials.flexjson.common.Student;



import flexjson.JSONDeserializer;



public class DeserializeTest {



  /**

   * @param args

   */

  public static void main(String[] args) {



    JSONDeserializer<Student> deserializer = new JSONDeserializer<Student>();

    String jsonStr =

      "{" +

          "\"age\": 2," +

          "\"class\": \"com.bethecoder.tutorials.flexjson.common.Student\"," +

          "\"dob\": 1339935437234," +

          "\"firstName\": \"Sriram\"," +

          "\"hobby\": \"Singing\"," +

          "\"lastName\": \"Kasireddi\"" +

      "}";

    

    Student std = deserializer.deserialize(jsonStr);

    System.out.println(std);

  }



}