PHP Java

http://my.oschina.net/lajp/blog/5121

http://blog.163.com/lijianwei_123/blog/static/184892891201152443311802/

http://www.360doc.com/content/12/1012/14/59141_241041810.shtml

http://blog.renren.com/share/239375569/5199828120

 double submit

http://en.wikipedia.org/wiki/Post/Redirect/Get

 http://developer.51cto.com/art/201311/417045.htm

http://book.51cto.com/art/200908/145235.htm

http://jishudaima.iteye.com/blog/917993

 http://www.cnblogs.com/wintersun/archive/2012/03/24/2415349.html

http://www.alixixi.com/Dev/Web/ASPNET/aspnet1/2007/200702064961.html

http://blog.163.com/qincuimin@126/blog/static/359254582012102314221653/

http://www.cnblogs.com/hiteddy/archive/2012/03/29/2423520.html