JavaBean與json字元串互轉

student類：

public class Student {
    private String username;
    private String password;
    public String getUsername() {
        return username;
    }
    public void setUsername(String username) {
        this.username = username;
    }
    public String getPassword() {
        return password;
    }
    public void setPassword(String password) {
        this.password = password;
    }
    public Student(String username, String password) {
        super();
        this.username = username;
        this.password = password;
    }
    public Student() {
        super();
        // TODO Auto-generated constructor stub
    }
    @Override
    public String toString() {
        return "Student [username=" + username + ", password=" + password + "]";
    }
}      

定義對象，JavaBean對象轉json字元串

//定義對象
Student stu = new Student("test", "123456");
//JavaBean對象轉json字元串
JSONObject jsonObject = JSONObject.fromObject(stu);
System.out.println(jsonObject);      

json字元串轉為javaBean

//json字元串轉為javaBean
//定義json字元串
String jsondata = "{\"username\":\"test1\", \"password\":\"123\"}";
//轉為json對象
JSONObject json = JSONObject.fromObject(jsondata);
//轉為JavaBean對象
Student stu2 = (Student)JSONObject.toBean(json, Student.class);
System.out.println(stu2.toString());      

全部代碼：

import net.sf.json.JSONObject;
 
public class Json {
    public static void main(String[] args) {
        //定義對象
        Student stu = new Student("test", "123456");
        //JavaBean對象轉json字元串
        JSONObject jsonObject = JSONObject.fromObject(stu);
        System.out.println(jsonObject);
        
        //json字元串轉為javaBean
        //定義json字元串
        String jsondata = "{\"username\":\"test1\", \"password\":\"123\"}";
        //轉為json對象
        JSONObject json = JSONObject.fromObject(jsondata);
        //轉為JavaBean對象
        Student stu2 = (Student)JSONObject.toBean(json, Student.class);
        System.out.println(stu2.toString());
    }
}      

輸出結果：

{"password":"123456","username":"test"}
Student [username=test1, password=123]