java对象---json字符串

package jsonm;

import net.sf.json.JSONObject;

import bean.Fri;

public class JTest {

public static void fa(){

Fri f = new Fri("zhang",18);

JSONObject jo = JSONObject.fromObject(f);

String str = jo.toString();

System.out.println(str);

}

public static void main(String[] args) {

fa();

}

}