求助：Extjs4中store无法获取服务器端返回数据

[蚂蚁的主儿]

客户端ajax可以发送请求到服务器端，服务器端可以打印出返回的数据，但在客户端无法收接数据，请大神们帮忙看看代码。谢谢

Ext.onReady(function() {
	Ext.define('ClassDic', {
	    extend: 'Ext.data.Model',
	    /*fields: [{name:'dicName',type:'string'},
	             {name:'dicValue',type:'int'},	
				 {name:'clsType',type:'int'},
				 {name:'enabled',type:'int'}
	    ]*/
	    fields: ["dicName","dicValue","clsType","enabled"]
	});
	var atClassStore = Ext.create("Ext.data.Store", {
		model: 'ClassDic',
	    proxy: {
	        type: 'ajax',
	        url : 'dic_ajaxListUpClass',
	        reader: {
	             type: 'json',
	             root: 'data'
	         }
	    },
			autoLoad: true
		});
	Ext.Msg.alert(atClassStore.data);

主要是在这儿绑定不到数据：

{
			xtype:'fieldcontainer',
			layout:'hbox',
			width:'100%',
			items:[{
				xtype: "combobox",
				allowBlank: false,
				blankText:"请选择现在就读班级！",
				name: 'regUser.upCls',
				flex:1,
				margin: '5  0 5 0',		
				fieldLabel: "所在班级",
				store: atClassStore,
				editable: false,
				displayField: "dicName",
				valueField: "dicValue",
				emptyText: "--请选择班级--",
				queryMode: "local"
				
			}

服务器端代码：

public String ajaxListUpClass(){

			List<ClassDic> list=dicService.listUpClass();
			result=JsonTool.objectToJsonStr(list);//对象转json 自动加上success属性
			System.out.println(result);
		return "toAjax";
	
	}

服务器打印的json数据。
{'success':true,'data':[{"clsType":2,"dicName":"高一(1)班","dicValue":1,"enabled":1},{"clsType":2,"dicName":"高一(2)班","dicValue":2,"enabled":1},{"clsType":2,"dicName":"高一(3)班","dicValue":3,"enabled":1},{"clsType":2,"dicName":"高一(4)班","dicValue":4,"enabled":1},{"clsType":2,"dicName":"高一(5)班","dicValue":5,"enabled":1},{"clsType":2,"dicName":"高一(6)班","dicValue":6,"enabled":1},{"clsType":2,"dicName":"高一(7)班","dicValue":7,"enabled":1},{"clsType":2,"dicName":"高一(8)班","dicValue":8,"enabled":1},{"clsType":2,"dicName":"高一(9)班","dicValue":9,"enabled":1},{"clsType":2,"dicName":"高一(10)班","dicValue":10,"enabled":1},{"clsType":2,"dicName":"高一(11)班","dicValue":11,"enabled":1},{"clsType":2,"dicName":"高一(12)班","dicValue":12,"enabled":1},{"clsType":2,"dicName":"高一(13)班","dicValue":13,"enabled":1},{"clsType":2,"dicName":"高一(14)班","dicValue":14,"enabled":1},{"clsType":2,"dicName":"高一(15)班","dicValue":15,"enabled":1},{"clsType":2,"dicName":"高一(16)班","dicValue":16,"enabled":1},{"clsType":2,"dicName":"高一(17)班","dicValue":17,"enabled":1},{"clsType":2,"dicName":"高一(18)班","dicValue":18,"enabled":1},{"clsType":2,"dicName":"高一(19)班","dicValue":19,"enabled":1},{"clsType":2,"dicName":"高一(20)班","dicValue":20,"enabled":1}]}

[Go 旅城通票]

自己f12看浏览器获取到的数据是这些没有，不要看服务器端的，服务器端得到的不一定就是客户端最终得到的

[蚂蚁的主儿]

引用 1 楼 showbo的回复:

自己f12看浏览器获取到的数据是这些没有，不要看服务器端的，服务器端得到的不一定就是客户端最终得到的

firebug没有接受到数据