struts2映射action，一直报错找不到action，但是配置应该没问题

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struts2映射action，一直报错找不到action，但是配置应该没问题5

请各位抽空帮小弟看下，谢谢
这是我的web.xml文件

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5" 
	xmlns="http://java.sun.com/xml/ns/javaee" 
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
	xsi:schemaLocation="http://java.sun.com/xml/ns/javaee 
	http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
  <welcome-file-list>
    <welcome-file>index.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>
</web-app>

这是struts.xml文件

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC
    "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
    "http://struts.apache.org/dtds/struts-2.0.dtd">

<struts>
	<!-- 
    <constant name="struts.enable.DynamicMethodInvocation" value="false" />
    <constant name="struts.devMode" value="false" />

    <include file="example.xml"/>



    <package name="default" namespace="/" extends="struts-default">
        <default-action-ref name="index" />
        <action name="index">
            <result type="redirectAction">
                <param name="actionName">HelloWorld</param>
                <param name="namespace">/example</param>
            </result>
        </action>
    </package>
	 -->
	 
    <!-- Add packages here -->	 
	<constant name="struts.devMode" value="true" />
	<constant name="struts.ui.theme" value="simple" />
	 
	<package name="login" namespace="/login" extends="struts-defualt">
		<action name="login" class="com.mycompany.student.action.LoginAction">
	 		<result name="success">/main.jsp</result>
	 		<result name="input">/index.jsp</result>
		</action>
	</package>

</struts>

这是LoginAction.java

package com.mycompany.student.action;

import com.opensymphony.xwork2.ActionSupport;

@SuppressWarnings("serial")
public class LoginAction extends ActionSupport {
	private String username;
	private String password;
	
	public void setUsername(String username) {
		this.username = username;
	}
	public String getUsername() {
		return username;
	}
	public void setPassword(String password) {
		this.password = password;
	}
	public String getPassword() {
		return password;
	}
	
	public String execute() throws Exception {
		return SUCCESS;
		/*if(getUsername().trim().equals("jim") && getPassword().trim().equals("123")) {
			return SUCCESS;
		}
		else {
			return INPUT;
		}*/
	}
	@Override
	public void validate() {
		if(getUsername() == null || getUsername().trim().equals("")) {   
			addFieldError("userName", "请输入用户名称");   
		}
		if(getPassword() == null || getPassword().trim().equals("")) {   
			addFieldError("passWord", "请输入用户密码");   
		}
	}	
}

这是index.jsp文件

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@ taglib uri="/struts-tags" prefix="s" %>
<%
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>index.jsp</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">
	<!--
	<link rel="stylesheet" type="text/css" href="styles.css">
	-->

  </head>
  
  <body>
    <form name="login" action="login/login.action" method="post">
   用户名:<input type="text" name="username" style="width:120px" /><br>
   密码:<input type="password" name="password" style="width:120px" /><br>
        <input type="submit" value="登&nbsp;&nbsp;陆" style="width:100px"/><br>
        <input type="reset" value="重&nbsp;&nbsp;填" style="width:100px"/>
    </form>  		
  </body>
</html>

问题补充：不好意思，报错信息没贴上：
信息: Starting Coyote AJP/1.3 on ajp-8009
2012-8-21 20:20:43 org.apache.catalina.startup.Catalina start
信息: Server startup in 4236 ms
2012-8-21 20:21:08 com.opensymphony.xwork2.util.logging.commons.CommonsLogger error
严重: Could not find action or result
/student/login/login.action
There is no Action mapped for action name login. - [unknown location]
at com.opensymphony.xwork2.DefaultActionProxy.prepare(DefaultActionProxy.java:185)
at org.apache.struts2.impl.StrutsActionProxy.prepare(StrutsActionProxy.java:63)
at org.apache.struts2.impl.StrutsActionProxyFactory.createActionProxy(StrutsActionProxyFactory.java:39)
at com.opensymphony.xwork2.DefaultActionProxyFactory.createActionProxy(DefaultActionProxyFactory.java:58)
at org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:501)
at org.apache.struts2.dispatcher.ng.ExecuteOperations.executeAction(ExecuteOperations.java:77)
at org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.doFilter(StrutsPrepareAndExecuteFilter.java:91)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293)
at org.apache.coyote.http11.Http11AprProcessor.process(Http11AprProcessor.java:877)
at org.apache.coyote.http11.Http11AprProtocol$Http11ConnectionHandler.process(Http11AprProtocol.java:594)
at org.apache.tomcat.util.net.AprEndpoint$Worker.run(AprEndpoint.java:1675)
at java.lang.Thread.run(Thread.java:662)