//引入相應的包
//json-lib-2.2-jdk15.jar
importnet.sf.json.JSONArray;
importnet.sf.json.JSONObject;
1.//把java對象列表轉換爲json對象數組,並轉爲字符串
JSONArrayarray=JSONArray.fromObject(userlist);
Stringjsonstr=array.toString();
2.//把java對象轉換成json對象,並轉化爲字符串
JSONObjectobject=JSONObject.fromObject(invite);
3.//把JSON字符串轉換爲JAVA對象數組
Stringpersonstr=getRequest().getParameter("persons");
JSONArrayjson=JSONArray.fromObject(personstr);
List<InvoidPerson>persons=(List<InvoidPerson>)JSONArray.toCollection(json,nvoidPerson.class);