struts2失去request response

struts2得到request responseActionContext ctx ActionContext.getContext()HttpServletRequest reques

struts2得到request response

ActionContext ctx = ActionContext.getContext();               HttpServletRequest request = (HttpServletRequest)ctx.get(ServletActionContext.HTTP_REQUEST);               HttpServletResponse response = (HttpServletResponse)ctx.get(ServletActionContext.HTTP_RESPONSE);