Did you mean dispatcherServlet? you can just extends this servlet, re-config it in web.xml.
<servlet>
<servlet-name>springmvc</servlet-name>
<servlet-class>Your DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:/META-INF/springmvc-servlet.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>