Extjs获取后台数据，grid中无法显示，急！！！！！

[成长之路2020]

/**
	后台获取到的数据
	{ success:true,totalSize:5,
	  datas:[
		{stuAge:"23",stuHeight:"895",stuWeight:"89",stuName:"jim",stuScore:"45"},
		{stuAge:"3444",stuHeight:"178",stuWeight:"78",stuName:"李雷",stuScore:"701"},
		{stuAge:"27",stuHeight:"67",stuWeight:"189",stuName:"吉姆",stuScore:"89"},
		{stuAge:"45",stuHeight:"454",stuWeight:"1221",stuName:"童米",stuScore:"65"},
		{stuAge:"343",stuHeight:"34",stuWeight:"34",stuName:"DF",stuScore:"34"}
	  ]
	}
*/

Ext.onReady(function() {

	var queryForm = new Ext.form.FormPanel({
				id : 'queryForm',
				region : 'center',
				border : false,
				labelAlign : 'right',
				labelWidth : 90,
				bodyStyle : 'padding:5px',
				buttonAlign : 'center',
				autoHeight : true,
				autoWidth : true,
				applyTo : "queryForm",
				items : [{
							xtype : 'fieldset',
							title : '学生信息查询',
							autoHeight : true,
							autoHeight : true,
							collapsed : false,
							collapsible : true,
							animCollapse : true,
							items : [{ // 行1
								layout : "column", // 从左往右的布局
								border : false,
								items : [{
									columnWidth : .4, // 该列有整行中所占百分比
									layout : "form", // 从上往下的布局
									border : false,
									items : [{
												xtype : 'textfield',
												fieldLabel : '姓名',
												name : 'stuName',
												id : 'stuName',
												anchor : '80%'
											}]
									},
								{
									columnWidth : 0.3, // 该列有整行中所占百分比
									layout : "form", // 从上往下的布局
									border : false,
									items : [{
										xtype : 'numberfield',
										fieldLabel : '最低分数',
										name : 'minScore',
										id : 'minScore'
											// vtype:
											// 'daterange',
											// startDateField:
											// 'startdt', // id
											// of the end date
											// field
											// anchor:'100%'
										}]
								}, {
									columnWidth : 0.3, // 该列有整行中所占百分比
									layout : "form", // 从上往下的布局
									border : false,
									items : [{
												xtype : 'numberfield',
												fieldLabel : '最高分数',
												name : 'maxScore',
												id : 'maxScore'
											}]
								}]
							}],
							buttons : [{
								iconCls : 'btn-search',
								text : '查 询',
								width : 75,
								height : 20,
								disabled : false,
								handler : queryFun
								}]
						}]
			});
		
	 
	// 创建表格列
	var cum = new Ext.grid.ColumnModel([
		new Ext.grid.RowNumberer(), // 自动产生行号
		//{header:"序号",dataIndex:"stuId"},
		{header:"姓名",dateIndex:'stuName'},
		{header:"年龄",dateIndex:'stuAge'},
		{header:"分数",dateIndex:'stuScore'},
		{header:"体重",dateIndex:'stuWeight'},
		{header:"身高",dateIndex:'stuHeight'}
	]);
	
	var store = new Ext.data.JsonStore({
		autoLoad:false,
		proxy:new Ext.data.HttpProxy({url:ctxPath+'/student/index.shtml?method=query'}),
		reader:new Ext.data.JsonReader({
			totalProperty:'totalSize',
			successProperty: 'success',
			root:'datas'
		},[
			 {name:'stuName',mapping:'stuName'},
			 {name:'stuAge',mapping:'stuAge'},
			 {name:'stuScore',mapping:'stuScore'},
			 {name:'stuWeight',mapping:'stuWeight'},
			 {name:'stuHeight',mapping:'stuHeight'}
		])
		/*autoLoad: false,
		url: ctxPath+'/student/index.shtml?method=query',
		root:'datas',
		totalProperty:'totalSize',
		fields:['stuName','stuAge','stuScore','stuWeight','stuHeight']*/
		
	});
	
	// 网格布局
	var grid = new Ext.grid.GridPanel({
				id : 'data',
				title : '学生信息列表',
				frame : true,
				store : store,
				//selectedRowNumber : 0,
				stripeRows : true,
				// enableColumnMove: false,
				enableHdMenu : false,
				applyTo : "dataGrid",
				viewConfig : {
					// True表示为自动展开/缩小列的宽度以适应grid的宽度，这样就不会出现水平的滚动条
					forceFit : true
				},
				loadMask : {
					msg : '正在查询数据,请稍候......'
				},
				viewConfig : {
					forceFit : true, // 让grid的列自动填满grid的整个宽度，不用一列一列的设定宽度。
					emptyText : '未查询到记录'
				},
				cm : cum,
				tbar:[{
					id:'add',
					text:'新增',
					iconCls:'add',
					handler:showAdstoretudent
				},{
					id:'delete',
					text:'删除',
					iconCls:'delete',
					handler:function(){
					
					}
				},{
					id:'edit',
					text:'修改',
					iconCls:'edit',
					handler:function(){
					
					}
				}],
				bbar:new Ext.PagingToolbar({
					store:store,
					pageSize:15,
					displayInfo:true,
					emptyMsg:"未查询到记录",
					displayMsg:'显示第{0}条到{1}记录,一共{2}条'
					/*Load:function(start){
						var o ={};
						pn = this.getParams();
						o[pn.start] = start;
						o[pn.limit] = this.pageSize;
						this.store.load({params:o});
					}*/
				})
	});

	
	function queryFun(){
		/*//var stuName = Ext.getCmp('stuName').getValue();
		//var minScore = Ext.getCmp("minScore").getValue();
		//var maxScore = Ext.getCmp("maxScore").getValue();
		
		store.on('beforeload',function(){
			store.baseParams = {
				stuName:stuName,
				minScore:minScore,
				maxScore:maxScore
			};
		});*/
		
		store.proxy = new Ext.data.HttpProxy({
			url:ctxPath+"/student/index.shtml?method=query",
			method:'post'
		});
		store.load({params:{start:0,limit:15}}); 
	}
});