100 分急求!!! 明天交!!! 在线 请教!!!
怎么web.xml   中的servlet   mapping   不起作用！！！

代码如下：
<?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-app_2_3.dtd ">
<web-app>        
    <display-name> Welcome   to   Tomcat </display-name>
    <description>
          Welcome   to   Tomcat
    </description>
   
  <filter>
  <filter-name> Set   Character   Encoding </filter-name>
  <filter-class> filters.SetCharacterEncodingFilter </filter-class>
  <init-param>
  <param-name> encoding </param-name>
  <param-value> gb2312 </param-value>
  </init-param>
  </filter>
 
  <filter-mapping>
  <filter-name> Set   Character   Encoding </filter-name>
  <url-pattern> /* </url-pattern>
  </filter-mapping>
       
    <servlet>
                <servlet-name> login </servlet-name>
                <servlet-class> login.Login </servlet-class>
    </servlet>
    <servlet-mapping>
                <servlet-name> login </servlet-name>
                <url-pattern> servlet/login </url-pattern>
    </servlet-mapping>
   
    <servlet>
                <servlet-name> register </servlet-name>
                <servlet-class> register.Register </servlet-class>
    </servlet>
    <servlet-mapping>
                <servlet-name> register </servlet-name>
                <url-pattern> /servlet/register </url-pattern>
    </servlet-mapping>
   
    <servlet>
                <servlet-name> addgood </servlet-name>
                <servlet-class> admin.AddGood </servlet-class>
    </servlet>
    <servlet-mapping>
                <servlet-name> addgood </servlet-name>
                <url-pattern> /servlet/addgood </url-pattern>
    </servlet-mapping>
   
    <servlet>
                <servlet-name> delgood </servlet-name>
                <ser