1、需要的jar包json-lib.jar

      下载地址：

      http://sourceforge.net/projects/json-lib/files/json-lib/

      此包还需要以下的依赖包，

2、创建javabean文件，以下面的为例：

<span style="font-size:18px;">package com.gdhdcy.whp;

public class person_bean {
	public int id;
	public int getId() {
		return id;
	}
	public void setId(int id) {
		this.id = id;
	}
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
	public String getSex() {
		return sex;
	}
	public void setSex(String sex) {
		this.sex = sex;
	}
	public String getMoblie() {
		return moblie;
	}
	public void setMoblie(String moblie) {
		this.moblie = moblie;
	}
	public String name;
	public String sex;
	public String moblie;
	
}
</span>

3、bean/LIst/map生成json的代码：

<span style="font-size:18px;">package com.gdhdcy.whp;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import net.sf.json.JSONArray;
import net.sf.json.JSONObject;

public class json_create {
	public static void main(String args[]){
		
		//javabean生成json
		person_bean pb=new person_bean();
		pb.setId(1);
		pb.setName("wang");
		pb.setSex("男");
		pb.setMoblie("1341234568");
		JSONObject jsonobject=JSONObject.fromObject(pb);
		System.out.println(jsonobject.toString());
		//结果
		//{"id":1,"moblie":"1341234568","name":"wang","sex":"男"}
		
		//List生成json
		person_bean pb1=new person_bean();
		pb1.setId(2);
		pb1.setName("wang1");
		pb1.setSex("女");
		pb1.setMoblie("13123323");
		
		person_bean pb2=new person_bean();
		pb2.setId(3);
		pb2.setName("wang3");
		pb2.setSex("女");
		pb2.setMoblie("13232343673");
		
		List<Object> list=new ArrayList<Object>();
		list.add(pb1);
		list.add(pb2);
		
		JSONArray jsonarray=JSONArray.fromObject(list);
		System.out.println(jsonarray.toString());
		/**
		 * 结果如下
		 */
		//[{"id":2,"moblie":"13123323","name":"wang1","sex":"女"},{"id":3,"moblie":"13232343673","name":"wang3","sex":"女"}]

		
		//map转换成json
		HashMap<String, String> map=new HashMap<String, String>();
		map.put("1", "hai");
		map.put("2", "tian");
		map.put("3", "zhi");
		JSONObject jsonobject1=JSONObject.fromObject(map);
		System.out.println(jsonobject1.toString());
		//结果：
		//{"3":"zhi","2":"tian","1":"hai"}

	}
}
</span>

{"id":1,"moblie":"1341234568","name":"wang","sex":"男"}
[{"id":2,"moblie":"13123323","name":"wang1","sex":"女"},{"id":3,"moblie":"13232343673","name":"wang3","sex":"女"}]
{"3":"zhi","2":"tian","1":"hai"}

json学习初体验--使用第三方的jar包实现bean、List、map创建json格式