springMVC获取request和response
1:在BaseController中加入：
　　　protected HttpServletRequest request;  
　　　protected HttpServletResponse response;  
　　　protected HttpSession session;
　　　@ModelAttribute  
　　　public void setReqAndRes(HttpServletRequest request, HttpServletResponse response){  
          this.request = request;  
          this.response = response;  
          this.session = request.getSession();  
　　　}  
说明：ModelAttribute的作用

2:也可以直接在方法参数上声明：
public String hello(HttpServletRequest request,HttpServletResponse response)

Struts2获取request和response
1：实现org.apache.struts2.interceptor.ServletResponseAware接口

2：HttpServletResponse response = (HttpServletResponse)
ActionContext.getContext().get(org.apache.struts2.StrutsStatics.HTTP_RESPONSE);
HttpServletRequest request = (HttpServletRequest)
ActionContext.getContext().get(org.apache.struts2.StrutsStatics.HTTP_REQUEST);

3：HttpServletResponse response = ServletActionContext.getResponse()