在SpringMVC中获取request和response

本文参考：http://blog.sina.com.cn/s/blog_7085382f0102v9jg.html

                  http://www.cnblogs.com/xusir/p/4135419.html

1.最简单的方式（注解法）

2.最麻烦的方法

   a. 在web.xml中配置一个监听

<listener>
<listener-class>
org.springframework.web.context.request.RequestContextListener
</listener-class>
</listener>

   b.之后在程序里可以用

HttpServletRequest request = ((ServletRequestAttributes)RequestContextHolder.getRequestAttributes()).getRequest();

HttpServletResponse resp = ((ServletWebRequest)RequestContextHolder.getRequestAttributes()).getResponse();

3.最直接的方法

4.注解（现在用的）
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