extjs的treegird的json数据

静态数据看了下有个children属性，然后叶子节点有一个leaf属性，现在要通过action获取到后台的数据，但是不知道怎么组织数据的结构，我有个部门的实体类，里面只有一个上级id是指向父部门的id，求教怎么才能将数据显示到页面？

解决方案 »

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给你发个我们用的吧。 <%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@page import="HibernateDAO.*"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
    <base href="<%=basePath%>">

    <title>ERP</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
 <link rel="stylesheet" type="text/css" href="css/ext-all.css"/>
    
    
    <script type="text/javascript" src="js/ext-base.js"></script>
        <script type="text/javascript" src="js/ext-all.js"></script>

  </head>
  <script>
  Ext.onReady(function() {
var addPanel = function(btn, event) { var n;
n = tabPanel.getComponent(btn.id);
if(n) {
tabPanel.setActiveTab(n);
return;
}
n = tabPanel.add( {
id : btn.id,
title : btn.text,
html : '<iframe width=100% height=100% src=' + btn.id + ' />',
//autoLoad : '',
closable : 'true'
});
tabPanel.setActiveTab(n);

}<%           List<Submenu> list2 = (List<Submenu>) request.getAttribute("submenus");
List<Menu> list=(List<Menu>)request.getAttribute("menus");
List<Useraction> list1=(List<Useraction>)request.getAttribute("list");
for(int i=0;i<list.size();i++){
Menu menu=(Menu)list.get(i);
String s= menu.getMenuname().toString();
String id=menu.getId().toString();
%>            var item<%= i%> = new Ext.Panel({

                title: '<%= s%>',
                cls:'empty',
                  autoScroll : true,

                items : [

                <%
                int size=0;
                for(int k=0;k<list2.size();k++){
                 Submenu submenu=list2.get(k);
                 if( submenu.getMenuid().toString().equals(id)){
size++;
                 }
                }
             int ids=0;
                for(int j=0;j<list2.size();j++){
                 Submenu submenu=list2.get(j);
                 if( submenu.getMenuid().toString().equals(id)){
                 %>
                 new Ext.Button({
id : '<%= submenu.getUrl().toString() %>',
text : '<%=submenu.getMenuname().toString()%>',
width : '100%',
listeners : {
click : addPanel
}
})
                 <%
                 if((ids+1)<size )
                 {
                 ids++;
                 %>,<%}
                 }
                }
                %>
]
            });
<%
}
%>
            var accordion = new Ext.Panel({
                region:'west',
                title: '菜单',
                split: true,
                 width: 200,
                minSize: 175,
                maxSize: 400,
                collapsible: true,
                margins: '0 0 0 5',
                margins:'5 0 5 5',
                split:true,
                width: 210,
                layout:'accordion',
                items: [
                 <%
                for(int i=0;i<list.size();i++){
                 if((i+1)<list.size()){
                 %>

                 item<%= i%>,

                 <%}
                 if((i+1)==list.size()){
                 %>

                 item<%= i%>

                 <%}
                }
                %>
                ]
            });


            var tabPanel = new Ext.TabPanel( {
region : 'center',
enableTabScroll : true,
deferredRender : false,
activeTab : 0,
items : [ { title : 'index', //html : 'aaaaaa'
autoLoad : 'Category_add.jsp'
} ]
});
            var viewport = new Ext.Viewport({
                layout:'border',
               items : [ accordion, tabPanel ]
            });
        });
  </script>
  <body>
  <span></span>
   <div id="grid-example" style="width:100%;height: 650px;" ></div>
  </body>
</html>
Menu 是父菜单表，submenu 是子菜单表  设计很扯蛋，而且用jsp小脚本，这些就不要看了吧。主要看怎么读出来的。qq303579750