Struts2 -- request response

1. org.apache.struts2.ServletActionContext

　　 HttpServletRequest request2= ServletActionContext.getRequest();
      HttpServletResponse response = ServletActionContext.getResponse();

      ServletActionContext可以直接使用。

2. ActionContext

　　ActionContext ct= ActionContext.getContext();
     HttpServletRequest request=(HttpServletRequest)ct.get(ServletActionContext. HTTP_REQUEST );

　　HttpServletResponse response =(HttpServletResponse)ct.get(ServletActionContext.HTTP_RESPONSE );