springMVC获取request和response

@RequestMapping("/test") @ResponseBody public void saveTest(HttpServletRequest req, HttpServletResponse resp){
　　
}

这样的话如果要用ajax每次都要将response作为参数传递，不方便使用

2.注解
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