关于dwr传javabean参数的问题

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关于dwr传javabean参数的问题15

本人刚刚自学了dwr,按照网上的讲解测试了dwr返回值为javabean,list,map,String[],String都没问题，但是在测试带javabean参数的时候出问题了，老是返回Error,为此又看了很多视频讲解，但是始终没找到问题所在，百度百科上的讲解也是和我写的一样，求各位大神指点，下面是代码
java代码
public class dwrtest {
public String test3(User user){
return user.getUser();
}
}

User.java
public class User {
private String user;
private String password;
public User(String user, String password) {
super();
this.user = user;
this.password = password;
}
public String getUser() {
return user;
}
public void setUser(String user) {
this.user = user;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}

}

dwr.xml
<?xml version="1.0" encoding="UTF-8"?>
<dwr>
<allow>
<create creator="new" javascript="testClass" class="com.niit.action.dwrtest">
</create>
<convert converter="bean" match="com.niit.action.User" >
   <param include="include" value="user,password"/>
   </convert>
   　</allow>
</dwr>

web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.4"
xmlns="http://java.sun.com/xml/ns/j2ee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee
http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
<welcome-file-list>
    <welcome-file>dwr.jsp</welcome-file>
</welcome-file-list>
   <filter>
        <filter-name>struts2</filter-name>
        <filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>
    </filter>

    <filter-mapping>
        <filter-name>struts2</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>
<servlet>
    <servlet-name>dwr-invoker</servlet-name>
<display-name>DWR Servlet</display-name>
<description>Direct Web Remoter Servlet</description>

    <servlet-class>uk.ltd.getahead.dwr.DWRServlet</servlet-class>
<init-param>
   <param-name>debug</param-name>
   <param-value>true</param-value>
</init-param>

</servlet>

<servlet-mapping>
<servlet-name>dwr-invoker</servlet-name>
<url-pattern>/dwr/*</url-pattern>
</servlet-mapping>



</web-app>

jsp
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
    <base href="<%=basePath%>">

    <title>My JSP 'dwr.jsp' starting page</title>

<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">


<script type="text/javascript" src="js/jquery-1.4.2.js"></script>
<script type="text/javascript" src="dwr/engine.js"></script>
<script type="text/javascript" src="dwr/util.js"></script>
<script type="text/javascript" src="dwr/interface/testClass.js"></script>

<script>
$(function(){

$("#btn").click(function(){

testClass.test3({user:"tom",password:"111"},function(data){alert(data);});

});

});

</script>
</head>

<body>

    <input type="button" name="btn" id="btn" value="点击"/>

</body>
</html>