小弟刚接触，请百忙中抽出时间帮小弟解决一下：为什么jsp中的数据不能在表格里显示
html:
<html>
<head>
<title>hello.html</title>
<link rel="stylesheet" type="text/css" href="../ext/resources/css/ext-all.css"/>
<script type="text/javascript" src="../ext/adapter/ext/ext-base.js"></script>
<script type="text/javascript" src="../ext/ext-all.js"></script>
<script type="text/javascript" src="../ext/build/locale/ext-lang-zh_CN-min.js"></script>
<script>
Ext.onReady(function(){
var sm = new Ext.grid.CheckboxSelectionModel();
var cm = new Ext.grid.ColumnModel([
new Ext.grid.RowNumberer(),
sm,
{header:'编号',dataIndex:'id'},
{header:'名称',dataIndex:'name'},
{header:'描述',dataIndex:'descn'}
]);
cm.defaultSortable = true;
var ds = new Ext.data.Store({
proxy: new Ext.data.HttpProxy({url:'webPage.jsp'}),
reader: new Ext.data.JsonReader({
totalProperty: 'totalProperty',
root: 'root'
}, [
{name: 'id'},
{name: 'name'},
{name: 'descn'}
])
});
ds.load({params:{start:0,limit:10}});
var grid = new Ext.grid.GridPanel({
el: 'grid',
ds: ds,
cm: cm,
sm: sm,
title: 'JSP->JSON',
bbar: new Ext.PagingToolbar({
pageSize: 10,
store: ds,
displayInfo: true,
displayMsg: '显示第 {0} 条到 {1} 条记录，一共 {2} 条',
emptyMsg: "没有记录"
}),
tbar: new Ext.PagingToolbar({
pageSize: 10,
store: ds,
displayInfo: true,
displayMsg: '显示第 {0} 条到 {1} 条记录，一共 {2} 条',
emptyMsg: "没有记录"
})
});
grid.render();
})
</script>
</head>
<body>
<div id="grid" style="height:265px;"></div>
</body>
</html>
--------jsp
<%
request.setCharacterEncoding("utf-8");
response.setCharacterEncoding("utf-8");
String start = request.getParameter("start");
String limit = request.getParameter("limit");
System.out.println(start+"--------"+limit);
try{
int index = Integer.parseInt(start);
int pageSize = Integer.parseInt(limit);
System.out.println(index+"---try-----"+pageSize);
String json = "{totalProperty:100,root:[";
for(int i=index;i<pageSize;i++){
json+="{'id':'"+i+"','name':'name"+i+"','descn':'descn"+i+"'}";
if(i!=pageSize+index-1){
json+=",";
}
}
json+="]}";
System.out.println(json);
response.getWriter().write(json);
}catch(Exception e){}
%>