Ext表格分页

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<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%
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>My JSP 'table.jsp' starting page</title>
    <!-- Ext lib -->
 <link rel="stylesheet" type="text/css" href="<%=basePath%>/script/ext/resources/css/ext-all.css">
 <script type="text/javascript" src="<%=basePath%>/script/ext/adapter/ext/ext-base.js"></script>
 <script type="text/javascript" src="<%=basePath%>/script/ext/ext-all.js"></script>
 <script type="text/javascript">
  Ext.onReady(function(){

      //定义列
   var cm = new Ext.grid.ColumnModel([
    {header:"编号", dataIndex:"id",sortable : true},
     //editor: new Ext.grid.GridEditor(new Ext.form.TextField({allowBlank:false}))},
    {header:"名称", dataIndex:"name",sortable : true},
    {header:"描述", dataIndex:"phone",sortable : true}
   ]);

   //数据源定义
   var ds = new Ext.data.Store({
    proxy: new Ext.data.HttpProxy({url:'<%=basePath%>/user.do?method=queryUser'}),
    reader: new Ext.data.JsonReader({
     totalProperty:'totalProperty',
     root:'root'
    },[
     {name:'id'},
     {name:'name'},
     {name:'phone'}
    ])
   });

   var grid = new Ext.grid.GridPanel({
    ds:ds,
    cm:cm,
    width:500,
    autoHeight:true,
    bbar:new Ext.PagingToolbar({
     pageSize:3,
     store:ds,
     displayInfo:true,
     displayMsg:'显示第{0}条到第{1}条记录,一共{2}条',
     emptyMsg:'没有记录'
    })
   });
   ds.load({params:{start:0,limit:3}});
   grid.render("grid");
  
  });
  
 </script>
  </head>
   <div id="grid"></div>
  <body>

  </body>
</html>