myeclipse里建的web工程编译没有问题，但不能在浏览器里打开，会出现问题（404错误）。拜托高手指点一下！！！！

Question

myeclipse里的web编译时没有问题，但在浏览器里输入url之后就会出现HTTP Status 404 错误。查了很多地方，也弄了很长时间都没解决。用login做首页登入后跳转到index的。整个功能是一个动态的在线书签。求高手指点一下。[/size]以下是我web.xml部署：
<?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">
<listener>
<listener-class>cc.openhome.web.BookInitializer</listener-class>
</listener><context-param>
<param-name>BOOKMARK</param-name>
<param-value>/WEB-INF/books.txt</param-value>
</context-param><filter>
<filter-name>SecurityFilter</filter-name>
<filter-class>cc.openhome.web.SecurityFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>SecurityFilter</filter-name>
<url-pattern>/add.do</url-pattern>
</filter-mapping>
<filter-mapping>
<filter-name>SecurityFilter</filter-name>
<url-pattern>/*.jsp</url-pattern>
</filter-mapping>
  <servlet>
   <servlet-name>AddBook</servlet-name>
    <servlet-class>cc.openhome.view.Addbook</servlet-class>
    <init-param>
     <param-name>SUCCESS</param-name>
     <param-value>success.jsp</param-value>
    </init-param>
    <init-param>
     <param-name>ERROR</param-name>
     <param-value>add.jsp</param-value>
    </init-param>
  </servlet>
  
  <servlet>
    <servlet-name>BookInitializer</servlet-name>
    <servlet-class>cc.openhome.view.BookInitializer</servlet-class>
  </servlet>
 
  <servlet>
    <servlet-name>BookService</servlet-name>
    <servlet-class>cc.openhome.view.BookService</servlet-class>
  </servlet>
  
  <servlet>
    <servlet-name>SecurityFilter</servlet-name>
    <servlet-class>cc.openhome.view.SecurityFilter</servlet-class>
  </servlet>
  
  <servlet>
    <servlet-name>Login</servlet-name>
    <servlet-class>cc.openhome.view.Login</servlet-class>
    <init-param>
     <param-name>username</param-name>
     <param-value>caterpillar</param-value>
    </init-param>
    <init-param>
     <param-name>password</param-name>
     <param-value>123456</param-value>
    </init-param>
    <init-param>
     <param-name>SUCCESS</param-name>
     <param-value>index.jsp</param-value>
    </init-param>
    <init-param>
     <param-name>ERROR</param-name>
     <param-value>login.jsp</param-value>
    </init-param>
  </servlet>
  
  <servlet>
    <description>This is the description of my J2EE component</description>
    <display-name>This is the display name of my J2EE component</display-name>
    <servlet-name>User</servlet-name>
    <servlet-class>cc.openhome.view.User</servlet-class>
  </servlet>  <servlet-mapping>
    <servlet-name>AddBook</servlet-name>
    <url-pattern>/AddBookmaark</url-pattern>
  </servlet-mapping>
  <servlet-mapping>
    <servlet-name>BookInitializer</servlet-name>
    <url-pattern>/BookInitializer</url-pattern>
  </servlet-mapping>  <servlet-mapping>
    <servlet-name>BookService</servlet-name>
    <url-pattern>/BookService</url-pattern>
  </servlet-mapping>
  
 <servlet-mapping>
    <servlet-name>SecurityFilter</servlet-name>
    <url-pattern>/SecurityFilter</url-pattern>
  </servlet-mapping>  <session-config>
   <session-timeout>30</session-timeout>
  </session-config>
  <servlet-mapping>
    <servlet-name>Login</servlet-name>
    <url-pattern>/Login</url-pattern>
  </servlet-mapping>
  <servlet-mapping>
    <servlet-name>User</servlet-name>
    <url-pattern>/User</url-pattern>
  </servlet-mapping>
  <servlet-mapping>
    <servlet-name>CharacterFilter</servlet-name>
    <url-pattern>/CharacterFilter</url-pattern>
  </servlet-mapping>
  
  <welcome-file-list>
    <welcome-file>login.html</welcome-file>
  </welcome-file-list>
</web-app>

Answer 1

请求的URL是什么？关键是端口后面的部分

Answer 2

@dracularking url是http://localhost:8080/bookonline/login.jsp
不知道这个有没有问题

Answer 3

url是http://localhost:8080/bookonline/login.jsp
不知道这个有没有问题 

Answer 4

我一下看不出，不过这个最好的办法是你自己试
将web.xml化为最简（只剩下必要的），在保证项目名称和资源路径没有错误的前提下多试试

Answer 5

哥你的 web.xml文件 欢迎页面是<welcome-file>login.html</welcome-file>
还有就是你的 WEBROOT下面有 login.jsp没有