1、首先定义对象：

Ext.define('log',{extend:'Ext.data.Model',fields:[{name: 'id',mapping:'id'}, {name: 'user'}, {name: 'type'},{name: 'time'},{name: 'describe'}]});
2、定义Store：

        var logStore=Ext.create('Ext.data.Store', {pageSize:rowNum,model:'log',//对象remoteSort:true,proxy: {type:'ajax',actionMethods:{read:'POST'},//提交方式。post和geturl: 'log.htm?show',extraParams:{//提交时传递的参数 startTime:"",endTime:""},

               reader: {totalProperty: 'totalRows',//分页数据，总条数root: 'data'//分页list},simpleSortMode :true},sorters:[{property:'id',//排序direction:"ASC"}]});

3、定义grid：

var logGrid =  Ext.create('Ext.grid.Panel',{columnLines: true,width: '100%',id: 'logGrid',bbar:  Ext.create('Ext.PagingToolbar', {//分页工具栏store: logStore,id: 'pagger',displayInfo: true,displayMsg: '显示第 {0} 条到 {1} 条记录，一共 {2} 条',emptyMsg: "没有数据"}),viewConfig: {stripeRows: true},tbar: [{}],columns:[//表头{xtype: 'rownumberer',text:'序号',width:35,align:'left'},{header: 'ID',width: 70,dataIndex: 'id',id: 'id',hidden: true,menuDisabled: true},{header: '类别',width: 200,dataIndex: 'type',id: 'type',menuDisabled: false},{header: '时间',width: 200,dataIndex: 'time',id: 'time',menuDisabled: true},{header: '操作人',width: 200,dataIndex: 'user',id: 'user',menuDisabled: true},{header: '描述',width: 200,dataIndex: 'describe',id: 'describe',menuDisabled: true}],forceFit : true,//列自动扩展宽度store: logStore,autoScroll: true,stripeRows: true});logStore.load({params:{start:1,limit:10}});//加载数据//logStore.loadPage(1);//这样也行