实现自动配置

其实也没有什么窍门，就是在web.xml中加入：

<?xml version="1.0" ?>
<!DOCTYPE web-app PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN" "http://java.sun.com/dtd/web-app_2_3.dtd">

<!-- Copyright (c) 2002 by ObjectLearn. All Rights Reserved. -->
<web-app>

    <servlet>
     <servlet-name>UserinfoServlet</servlet-name> 
    <servlet-class>Test.UserinfoServlet</servlet-class>
    <load-on-startup>0</load-on-startup>     
 </servlet>                                        
   
    <servlet-mapping>                                 
    <servlet-name>UserinfoServlet</servlet-name>     
    <url-pattern>/UserinfoServlet</url-pattern>                 
 </servlet-mapping>                                

 <welcome-file-list>
  <welcome-file>index.jsp</welcome-file>
 </welcome-file-list>

 <error-page>
  <error-code>404</error-code>
  <location>/error.jsp</location>
 </error-page>

</web-app>

比较麻烦的地方就是 <load-on-startup>0</load-on-startup>  

还是觉得weblogic好用，tomcat配置起来好麻烦