liferay如何在struts2中調用ajax

1 jsp代碼如下

<%@ page language="java" import="java.util.*,com.liferay.portal.kernel.portlet.LiferayWindowState" pageEncoding="GBK"%>

<portlet:renderURL var="addRules" windowState="<%= LiferayWindowState.EXCLUSIVE.toString() %>"><portlet:param name="struts.portlet.action" value="pn/addPRules" /></portlet:renderURL>

</pre><pre name="code" class="html">$("#ackAll").click(function() { var siteId=$("#siteIdHidden").val(); var status=$("#statusHidden").val();    var acknowledged=$("#acknowledgedHidden").val();    var tiggerFrom=$("#tiggerFromHidden").val();    var tiggerTo=$("#tiggerToHidden").val();    var resetFrom=$("#resetFromHidden").val();    var resetTo=$("#resetToHidden").val();    var currentPage=$("#currentPageHidden").val();    var paramObj=assemblyObject(siteId,tiggerFrom,tiggerTo,resetFrom,resetTo,status,acknowledged,currentPage);setTimeout(function(){      $.ajax({                   type : 'POST',                   data:paramObj,                 url  : '<%=<span style="font-family: Arial, Helvetica, sans-serif;">addRules</span>%>',            success : function(data){           if("success"==data){                    backgroundProgram(        siteId,        status,        acknowledged,        tiggerFrom,        tiggerTo,        resetFrom,        resetTo,        currentPage        );                 }                 }               });  },300);        });

2 參考網站 

http://stackoverflow.com/questions/10240983/unable-to-call-struts2-action-using-jquery-ajax-in-liferay

http://www.liferay.com/zh/community/forums/-/message_boards/message/40701774