JSP+EXt2.0怎么实现分页

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',sortable:true},     {header:'名称',dataIndex:'name',sortable:true},     {header:'性别',dataIndex:'sex',sortable:true,renderer:function(value){     if(value=='male'){      return " <span style='color:red;font-weight:bold;'>红男 </span> <img src='./img/125.gif'>";     }else{      return " <span style='color:green;font-weight:bold;'>绿女 </span> <img src='./img/123.gif'>";     }    }},     {header:'描述',dataIndex:'descn',sortable:true}   ]);   cm.defaultSortable = true;   var ds = new Ext.data.Store({     proxy: new Ext.data.HttpProxy({url:'page.jsp'}),     reader: new Ext.data.JsonReader({         totalProperty: 'totalProperty',         root: 'root'  },   [     {name: 'id',mapping:'id'},     {name: 'name',mapping:'name'},     {name:'sex',mapping:'sex'},     {name: 'descn',mapping:'descn'}   ]),   remoteSort:true  });   var grid = new Ext.grid.GridPanel({   el: 'grid',   title:'Ext Grid Test',   width:450,   height:410,   trackMouseOver:false,   loadMask: {msg:'正在加载数据，请稍侯……'},   store:ds,   cm: cm,   sm:sm,   bbar: new Ext.PagingToolbar({       pageSize: 5,       store: ds,       displayInfo: true,       displayMsg: '当前显示 {0} - {1}条记录 /共 {2}条记录',       emptyMsg: "No topics to display"    })   });   grid.render();   ds.load({params:{start:0, limit:5}}); });

<%@ page language="java" pageEncoding="UTF-8"%><% String start = request.getParameter("start"); String limit = request.getParameter("limit");int index = Integer.parseInt(start); int pageSize = Integer.parseInt(limit); String json = "{totalProperty:100,root:["; String sex="";for (int i = index; i < pageSize + index; i++) { if(i%2==0){  sex="male";}else{  sex="female";}  json += "{id:" + i + ",name:'" + i + "',sex:'"+sex+"',descn:'descn" + i   + "'}";   if (i != pageSize + index - 1) {   json += ",";   } } json += "]}"; response.getWriter().write(json); System.out.print(json); %>k看完本文后你知道JSP+EXt2.0怎么实现分页的了吗？如果你还有更多其他知识也希望你们能够尽可能多的贡献和分享你的知识，以便可以让其他人也受益。