web配置

刚网上随便下了个web项目放到webapp里了
结果访问工程文件夹下index.jsp 结果404
试了试发现只要有WEB-INF就出404
web.xml内容 把里面.class都删了也不行 才学jsp，求被前辈指导<?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">

<filter>
    <filter-name>struts2</filter-name>
    <filter-class>org.apache.struts2.dispatcher.FilterDispatcher</filter-class>
</filter>
<filter-mapping>
    <filter-name>struts2</filter-name>
    <url-pattern>/*</url-pattern>
</filter-mapping>

<taglib>
    <taglib-uri>struts2</taglib-uri>
    <taglib-location>/WEB-INF/tld/struts-tags.tld</taglib-location>
</taglib>
</web-app>