<servlet-mapping>
        <servlet-name>UserServlet</servlet-name>
        <url-pattern>/user</url-pattern>
</servlet-mapping>
改成
<servlet-mapping>
        <servlet-name>UserServlet</servlet-name>
        <url-pattern>/user/userservlet</url-pattern>
</servlet-mapping><a href="/user/com.user.UserServlet?id=11111&name=ccc">用户管理</a>
改成
<a href="/user/userservlet?id=11111&name=ccc">用户管理</a>通过url-pattern就能找到servlet了