【 tulaoshi.com - Web开发 】
                             
                            1.5创建一个部署描述文件   
  ·为你的servlets注册并且创建一个url mapping
  ·注册并指定应用中的监听器和过滤器
  ·指定上下文中的初始化参数。
  ·配置错误页,和欢迎页
  ·配置seeion 超时
   ?xml version="1.0" encoding="ISO-8859-1"?
  !DOCTYPE web-app    PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"  "http://java.sun.com/dtd/web-application_2_3.dtd" 
  web-app  
       display-nameServlet 2.3 deployment descriptor/display-name 
       filter 
           filter-nameRequestFilter/filter-name 
           filter-classcom.mydev.RequestFilter/filter-class 
       /filter 
       filter-mapping  
          filter-nameRequestFilter/filter-name  
          url-pattern/*/url-pattern 
       /filter-mapping  
       listener   
          listener-classcom.mydev.ReqListener/listener-class
       /listener 
       servlet 
          servlet-nameMyServlet/servlet-name  
          servlet-classcom.mydev.MyServlet/servlet-class 
        /servlet  
        servlet-mapping  
           servlet-name MyServlet /servlet-name   
           url-pattern/myservlet/url-pattern  
        /servlet-mapping 
        session-config  
           session-timeout15/session-timeout
           /session-config  error-page  
        error-code404/error-code  
            location/err404.jsp/location
        /error-page
  /web-app 
  http://blog.csdn.net/bruceleey/archive/2007/02/07/1503854.aspx