struct2 获得request，response

public HttpServletRequest getRequest(){
        HttpServletRequest request=(HttpServletRequest)ActionContext.getContext().get(
                ServletActionContext.HTTP_REQUEST);
        return request;
    }
    
    public HttpServletResponse getResponse(){
        HttpServletResponse response=(HttpServletResponse) ActionContext.getContext().get(ServletActionContext.HTTP_RESPONSE);
        return response;
    }