servlet的web.xml配置问题!

Question

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE web-app PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN" "http://java.sun.com/dtd/web-app_2_3.dtd">
<web-app>
   <servlet>
    <servlet-name>UserRegisterServlet</servlet-name>
    <display-name>Test</display-name>
<description>Test</description>
    <servlet-class>zq.serv1.UserRegisterServlet</servlet-class>
  </servlet>
  <servlet-mapping>
    <servlet-name>UserRegisterServlet</servlet-name>
    <url-pattern>/regservlet</url-pattern>
  </servlet-mapping></web-app>