http://www.cnblogs.com/xiepeixing/archive/2012/10/18/2730324.html

http://m.blog.csdn.net/blog/atgwwx/7733179

http://www.cnblogs.com/mrye/archive/2013/05/26/3100431.html

http://www.cnblogs.com/mrye/archive/2012/08/09/2629895.html

http://www.cnblogs.com/mrye/archive/2012/08/09/2629895.html