急EasyUI中tree和struts2的整合有关问题

急！EasyUI中tree和struts2的整合问题
前台代码：

<%@page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>

<html>

<head>

<style>  

.layoutstyle{  

height:100%;  

width:100%;  

display:block;  

}  

</style>


<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">

<title>网点管理</title>

<link rel="stylesheet" type="text/css" href="${staticURL}/jquery-easyui/themes/default/easyui.css">

<link rel="stylesheet" type="text/css" href="${staticURL}/jquery-easyui/themes/icon.css">

<script type="text/javascript" src="${staticURL}/jquery-easyui/jquery-1.8.0.min.js"></script>

<script type="text/javascript" src="${staticURL}/jquery-easyui/jquery.easyui.min.js"></script>

<script type="text/javascript" src="${staticURL}/jquery-easyui/locale/easyui-lang-zh_CN.js"></script>

<script type="text/javascript" src="${staticURL}/My97DatePicker/WdatePicker.js"></script>

<script type="text/javascript">  

jQuery(function(){

	$.getJSON("getSiteTreeAction.action", function(json){

    	$('#typetree').tree({

    		checkbox: false,

    		data:json.jsonList

       	});

	});

})

</script> 

</head>

<body >

	<div class="easyui-layout  layoutstyle" >  

		<div region="east" split="true" title="网点类别"  style="width:150px;">  

			<ul id="typetree">  

			</ul>  

		</div>  

		<div id="content" region="center" title="网点列表" style="padding:5px;"> </div>  

	</div> 

</body>  

</html>

后台代码：



package com.haier.hfs.rt.department.action;

import java.util.ArrayList;

import java.util.List;


import javax.servlet.http.HttpServletResponse;


import net.sf.json.JSONArray;

import net.sf.json.JsonConfig;

import net.sf.json.util.PropertyFilter;


import org.apache.commons.logging.Log;

import org.apache.commons.logging.LogFactory;

import org.apache.struts2.json.annotations.JSON;


import com.haier.openplatform.showcase.basic.domain.Department;

import com.haier.openplatform.showcase.basic.service.DepartmentService;

import com.haier.openplatform.showcase.security.webapp.action.BaseSecurityAction;


public class DepartmentAction extends BaseSecurityAction {

	private static final long serialVersionUID = 1L;

	private static Log log = LogFactory.getLog(DepartmentAction.class);

	private DepartmentService departmentService;

	private HttpServletResponse response;

	private String treeJsonStr;

	private JSONArray jsonList ; 


	public void setDepartmentService(DepartmentService departmentService) {

		this.departmentService = departmentService;

	}


	public String departmentInit(){

		return SUCCESS;

	}


	@JSON(serialize = false)

	public String getSiteTreeAction() {  

		//这句话不用理会就是返回一个jsonarray就行

		List<JsonTN> list=new ArrayList<DepartmentAction.JsonTN>();

		list.add(new JsonTN("1","刘森","0"));

		list.add(new JsonTN("2","张三","0"));

		list.add(new JsonTN("3","李四","0"));

		list.add(new JsonTN("4","王五","0"));


		JSONArray jsonArray =JSONArray.fromObject(list);

		this.setJsonList(jsonArray); 

		this.setTreeJsonStr(jsonArray.toString());  

		return SUCCESS;  

	}


	public String getTreeJsonStr() {

		return treeJsonStr;

	}


	public void setTreeJsonStr(String treeJsonStr) {

		this.treeJsonStr = treeJsonStr;

	}


	public JSONArray getJsonList() {

		return jsonList;

	}


	public void setJsonList(JSONArray jsonList) {

		this.jsonList = jsonList;

	}


	public void setResponse(HttpServletResponse response) {

		this.response = response;

	}  


	public class JsonTN{

		private String id;

		private String name;

		private String pid;

		public String getId() {

			return id;

		}

		public void setId(String id) {

			this.id = id;

		}

		public String getName() {

			return name;

		}

		public void setName(String name) {

			this.name = name;

		}

		public String getPid() {

			return pid;

		}

		public void setPid(String pid) {

			this.pid = pid;

		}


		public JsonTN(String id,String name,String pid){

			this.id=id;

			this.name=name;

			this.pid=pid;

		}


	}




}

struts.xml代码

<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE struts PUBLIC

    "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"

    "http://struts.apache.org/dtds/struts-2.0.dtd">

<struts>

	<package name="department" extends="showcase" namespace="/department">

		<action name="departmentInit" class="departmentAction" method="departmentInit">

			<result name="success">/WEB-INF/pages/rt/department/departmentList.jsp</result>

		</action>

		<action name="getSiteTreeAction" class="departmentAction" method="getSiteTreeAction">

			<result name="success" type="json" />

		</action>

	</package>

</struts>

------解决思路----------------------
直接访问getSiteTreeAction.action看输出什么，是否符合easyui tree对象需要的json数据格式

急EasyUI中tree和struts2的整合有关问题

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