struts2 json

jsonlib的一些用法

1. List集合转换成json代码

List list = new ArrayList();

list.add( "first" );

list.add( "second" );

JSONArray jsonArray2 = JSONArray.fromObject( list );

2. Map集合转换成json代码

Map map = new HashMap();

map.put("name", "json");

map.put("bool", Boolean.TRUE);

map.put("int", new Integer(1));

map.put("arr", new String[] { "a", "b" });

map.put("func", "function(i){ return this.arr[i]; }");

JSONObject json = JSONObject.fromObject(map);

3. Bean转换成json代码

JSONObject jsonObject = JSONObject.fromObject(new JsonBean());

4. 数组转换成json代码

boolean[] boolArray = new boolean[] { true, false, true };

JSONArray jsonArray1 = JSONArray.fromObject(boolArray);

5. 一般数据转换成json代码

JSONArray jsonArray3 = JSONArray.fromObject("['json','is','easy']" );

使用时需要的包

commons-beanutils.jar

commons-collections.jar

commons-lang.jar

commons-logging.jar

ezmorph-1.0.6.jar

json-lib-2.2.3-jdk15.jar

用jsonlib转了之后用tostring

chatroom.put("roomlist", roomlist.toString());              

chatroom.put("memberlist", memberlist.toString());              

JSONObject jo = JSONObject.fromObject(chatroom);              

this.result = jo.toString();                

 return SUCCESS;  

<package name="jsonaction" namespace="/"  extends="json-default">      

<action name="getlist" class="com.taozhi.action.ChatAction" method="getlist">          

<result type="json"><param name="root">result</param></result>    

</action>                

</package>