mootools实现ajax

众所周知，ajax可通过直接写源码实现，但有点繁琐，现在流行的ajax框架都集成了ajax的功能，而且写起来非常简单方便。当然mootools也不例外。
   mootools的Request实现了对XMLHttpRequest的功能包装类，下面是我写的小例子：
js:

function testPing(){
        var url = document.getElementById("url").value;
        var pingRequest = new Request({
                        method: "post",
                        url:    "../site/ping.do",
                        onSuccess:  function(responseText){
                            if(responseText=="success"){
                                document.getElementById("pingDiv").innerHTML ="此url可ping通";
                            }
                            else{
                                document.getElementById("pingDiv").innerHTML ="此url不能ping通";
                            }
                        },
                        onFailure:  function(){
                            document.getElementById("pingDiv").innerHTML ="此url不能ping通";
                        }
                    });

                        pingRequest.send("url="+ url);
    }

html:

 <input type="text" id="url"  name="${status.expression}" value="$!{status.value}"/>
                <input type="button" name="ping" value="测试链接" onClick="testPing()" />
<div style="color: #f5001D;" id="pingDiv"></div>

java代码：

 @RequestMapping("/site/ping.do")
    public void ping(@RequestParam("url") String url,ModelMap model, HttpServletResponse response) throws IOException {

        AjaxUtil ajaxUtil = new AjaxUtil();
        try {
            Ping ping = new Ping();
            boolean pingFlag = ping.pingServer(url,5);
            if(pingFlag){
                ajaxUtil.ajaxOutput(response, "success");
            }else{
                ajaxUtil.ajaxOutput(response, "error");
            }
        } catch (Exception e) {
            ajaxUtil.ajaxOutput(response, e.toString());
        }
    }

public class AjaxUtil {

    /**
     * 将对象转化为JSON字符串
     * @param object
     * @return
     */
    public String convert2JSONString(Object object) {
        JSONArray jsonObject = JSONArray.fromObject(object);
        return jsonObject.toString();
    }

    /**
     * 返回AJAX调用结果
     * @param response
     * @param outputString
     * @throws java.io.IOException
     */
    public void ajaxOutput(HttpServletResponse response, String outputString) throws IOException {
        response.setContentType("text/html; charset=utf-8");
        response.getWriter().write(outputString);
        response.getWriter().flush();
    }
}