web.xml

<web-app>
  ..
  <servlet>
    <servlet-name>dispatcher</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <init-param>
      <param-name>contextInitializerClasses</param-name>
      <param-value>foo.bar.MyContextInitializer</param-value>
    </init-param>
  </servlet>
</web-app>