/*** Ajax 请求*/
Ext.define("SinoCloudAjaxRequestClass", {constructor : function () {var me = this;var viewport = me.getViewPort();if(viewport){window.sinoCloudAjaxRequestClassLoadingMak = new Ext.LoadMask(viewport, {msg:"处理中..."});}},request : function (method,param, url, func,anotherFunc) {  //用于执行ajax请求，其中，func为第一个回调方法，一般用于执行成功提示，可以使用该类的commonPrompt，也可以直接处理成功请求后的业务，anotherFunc用于处理请求成功后执行的业务，可选var me = this;me.showViewportLoading();Ext.Ajax.request({url: url,params: param,method: method,success: function (response, options) {me.hideViewportLoading();if(func){func(response, options,anotherFunc);}else{Ext.Msg.alert('error', 'error...did not define ajax callback function...');}}, failure: function (response, options) {me.hideViewportLoading();Ext.Msg.alert('错误', '系统错误，请稍候再试！');}});},get: function (param, url, func,anotherFunc) {var me = this;me.request("get",param,url,func,anotherFunc);}, post: function (param, url, func,anotherFunc) {var me = this;me.request("post",param,url,func,anotherFunc);},commonPrompt : function (response, options,anotherFunc) {  //一般提示if(anotherFunc){anotherFunc(response,options);}var text = response.responseText;if (text) {text = text.trim();var json = Ext.decode(text);var success = json.success;if (success) {Ext.Msg.alert('提示', "操作成功！");} else {var msg = json.msg;if(msg){Ext.Msg.alert('提示', msg);}else{Ext.Msg.alert('提示', "操作失败！");}}} else {Ext.Msg.alert('提示', "系统错误...");}},getViewPort : function () {return Ext.getBody();},showViewportLoading : function () {if(sinoCloudAjaxRequestClassLoadingMak){sinoCloudAjaxRequestClassLoadingMak.show();}},hideViewportLoading : function () {if(sinoCloudAjaxRequestClassLoadingMak){sinoCloudAjaxRequestClassLoadingMak.hide();}}
});

var ajax = Ext.create("SinoCloudAjaxRequestClass");
var param = {id : 1
};
var url = "demo.action";;
ajax.post(param,url,function(response, options){});或者 ： ajax.post(param,url,ajax.commonPrompt,function(response, options){});ajax.commonPrompt 会自动验证返回的json的success并给出提示