struts中页面不能跳转

我是在myeclipse+struts中进行测试的。
遇到的问题是总是不能由index.jsp跳转到login.jsp,请问各位大侠是为什么？
web.xml内容如下：
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" version="2.5" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee   http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
  <servlet>
    <servlet-name>action</servlet-name>
    <servlet-class>org.apache.struts.action.ActionServlet</servlet-class>
    <init-param>
      <param-name>config</param-name>
      <param-value>/WEB-INF/struts-config.xml</param-value>
    </init-param>
    <init-param>
      <param-name>debug</param-name>
      <param-value>3</param-value>
    </init-param>
    <init-param>
      <param-name>detail</param-name>
      <param-value>3</param-value>
    </init-param>
    <load-on-startup>0</load-on-startup>
  </servlet>
  <servlet-mapping>
    <servlet-name>action</servlet-name>
    <url-pattern>*.do</url-pattern>
  </servlet-mapping>
  <welcome-file-list>
    <welcome-file>index.jsp</welcome-file>
  </welcome-file-list>
  <login-config>
    <auth-method>BASIC</auth-method>
  </login-config>
</web-app>struts-config内容如下：
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts-config PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 1.2//EN" "http://struts.apache.org/dtds/struts-config_1_2.dtd"><struts-config>
  <data-sources />
  <form-beans >
  <form-bean name="loginForm" type="com.demo.struts.forms.LoginForm"></form-bean>
  </form-beans >
  <global-exceptions />
  <global-forwards />
  <action-mappings>
   <action path="/index" forward="/login.jsp"/>
   <action path="/login" name="loginForm" scope="request"
   type="com.demo.struts.action.LoginAction" input="/login.jsp">
   <forward name="success" path="/welcome.jsp"/>
   <forward name="failure" path="/login.jsp"/>
   </action>
  </action-mappings>
  <message-resources parameter="com.demo.struts.ApplicationResources" />
</struts-config>login.jsp内容如下：
<%@ 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 'login.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">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
-->  </head>
  
  <form name="loginForm" action="login.do" method ="post">
  <table width = "200" border = "1">
  <tr>
   <td colspan = "2">登录窗口</td>
  </tr>
  <tr>
   <td>用户名</td>
   <td><input type= "text" name="username" size="10"/></td>
  </tr>
   <tr>
   <td>密码</td>
   <td><input type = "password" name="password" size="10"/></td>
  </tr>
  <tr>
   <td colspan="2"><input type = "submit" name ="submit" value="登录">
   <a href="register.jsp">注册新用户</a></td>
  </tr>
   </table>
  </form>
</html>index.jsp内容如下：
<%@ page language="java" import="java.util.*" pageEncoding="ISO-8859-1"%>
<%
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 'index.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">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
-->
  </head>
  
  <body>
    This is my JSP page. <br>
  </body>
</html>