spring mvc 下载文件链接

http://www.blogjava.net/paulwong/archive/2014/10/29/419177.html

http://www.iteye.com/topic/1125784

http://blog.csdn.net/geloin/article/details/7537425

http://limingnihao.iteye.com/blog/1069503

http://blog.csdn.net/clj198606061111/article/details/20743769