struts2 Action中获取request, response对象的方法

struts2 Action中获取request, response对象的方法 

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