HttpServletRequest 与 ServletRequest

今天被Intellij害死了，重写execute方法居然没有http的，请求死活进不了action,加上http后才请求成功。
修改前

 public ActionForward execute(ActionMapping actionMapping, ActionForm actionForm,
 ServletRequest servletRequest, ServletResponse servletResponse) 

修改后

    public ActionForward execute(ActionMapping mapping, ActionForm form,
			HttpServletRequest request, HttpServletResponse response)