常用到jq的ajax

$(document).ready(function(){
            $("#result").bind("input propertychange",function(){
                 $.ajax({
                     url:"baiduServlet", //服务器地址
                     async:true,         //用同步请求，默认为true异步请求
                     cache:true,            //缓存数据
                     data:{result:$("#result").val()}, //传参
                     dataType:"json",    //返回数据类型
                     type: "post",
                     success: function(data,textStatus,jqXHR){
                         alert(data,name[1]);
                     }
                       
                 })
                 $.post("baiduServlet",{result:$("#result").val()},function(data)){
                     alert(data);
                 },"json");
                 ajaxRequest();
            });
        })

$("#username").bind("blur",function(){
        var url = "${pageContext.request.contextPath}/ajax/ajaxAction.action";
        $.post(url,$("#username").serialize(),function(rst){
            $("#aa").html(rst);
        },"html");
    })

function searchEmpRole(){
        $.ajax({
            type:"post",
            url:"${pageContext.request.contextPath}/addEmpRoleList/addEmpRoleListAction.action",
            dataType:"json",
            success:function(a){
            $.each(a.list,function(i,val){
                $("#roleId").append("<option value=\" "+val.id+" \" id="+val.id+">"+val.roname+"</option>");
             })
            }
        })
}

<?xml version="1.0" encoding="UTF-8" ?>

    <!DOCTYPE struts PUBLIC
        "-//Apache Software Foundation//DTD Struts Configuration 2.3//EN"
        "http://struts.apache.org/dtds/struts-2.3.dtd">

    <struts>
       <package name="ajax" namespace="/ajax" extends="json-default">
            <action name="ajaxAction" method="execute" class="com.seecen.action.AjaxAction">
                <result type="json" name="success">
                    <param name="includeProperties">list.*</param>
                </result>
            </action>
       </package>
    </struts>