json-lib使用

json-lib包可以将java对象转换为json。

 

下载json-lib包，或者struts2中已经集成了json-lib包。

 

为了以下演示例子。先定义一个学生类

 

public class Student {
	private int age;    //年龄
	private String name;    //姓名
	public int getAge() {
		return age;
	}
	public void setAge(int age) {
		this.age = age;
	}
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
}

 

 

 

 

例一：java对象--->json

 

 

import net.sf.json.JSONObject;

public class Test {
	public static void main(String[] args) {
		Student student1=new Student();
		student1.setAge(10);
		student1.setName("王小虎");
		
		JSONObject jsonObject = JSONObject.fromObject(student1);

		System.out.println(jsonObject.toString());
	}

	
}

 

打印输出内容：

{"age":10,"name":"王小虎"}

 

 

 

例二：java.util.List--->JavaScript Array

 

import java.util.ArrayList;
import java.util.List;

import net.sf.json.JSONArray;

public class Test {

	public static void main(String[] args) {
		Student student1=new Student();
		student1.setAge(10);
		student1.setName("王小虎");
		
		Student student2=new Student();
		student2.setAge(11);
		student2.setName("马小帅");
		
		List list=new ArrayList();
		list.add(student1);
		list.add(student2);
		
		JSONArray jsonObject = JSONArray.fromObject(list);
		System.out.println(jsonObject.toString());
	}

}

 

 

打印输出内容：

[{"age":10,"name":"王小虎"},{"age":11,"name":"马小帅"}]