http://www.oschina.net/question/8676_11797
http://blog.csdn.net/ouyangtianhan/article/details/6565768
http://my.oschina.net/amigos/blog/59871
http://blog.csdn.net/mars2639/article/details/6620836
http://www.cnblogs.com/angeldevil/archive/2011/12/02/2271096.html
原文地址：http://www.cnblogs.com/daishuguang/p/3724620.html
