ExtJs中ajax操作

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1、请求成功和失败是不同的函数去处理

   Ext.Ajax.request({
            url:actionName + '?method=query', //Action的访问路径
            params:{queryKey:},               //向Action传递的参数
            success:function(response,options){ //Ajax请求成功的处理思路
           alert("ajax请求成功");
          var data = Ext.decode(response.responseText);  //将返回的String类型的数据转换为  对象类型的数据
          var list =data.list;
           Ext.Msg.show({
                       title:'加载成功',
                       msg:'请求成功',
                       buttons:Ext.Msg.OK,
                       icon:Ext.Msg.OK
                    })
                },
       failuer:function(response,options){    //请求失败的处理思路
                   alert("请求失败");
                }
              })

2、返回是否成功通过callback函数结束

       Ext.Ajax.request({
         url:actionUrl+'?method=query',
         params:{queryKey:queryKey},
         callback:function(options,success,response){
         Ext.Msg.alert("",""+success);
        }
       })