1、的需要jar包裹json-lib.jar

下载链接：

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

此包还须要下面的依赖包，

commons-lang.jar

commons-beanutils .jar

commons-collections.jar

commons-logging.jar

ezmorph.jar

2、创建javabean文件，以以下的为例：

<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jsonperson_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jsonperson_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());/*** 结果例如以下*///[{"id":2,"moblie":"13123323","name":"wang1","sex":"女"},{"id":3,"moblie":"13232343673","name":"wang3","sex":"女"}]//map转换成jsonHashMap<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>

4、执行的结果：

{"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"}