http://www.cnblogs.com/hnrainll/archive/2013/11/06/3410042.html
http://www.blogjava.net/ldwblog/archive/2013/07/24/401919.html
http://blog.csdn.net/antony9118/article/details/51425581
http://blog.csdn.net/antony9118/article/details/51375662
http://www.importnew.com/1993.html
http://www.cnblogs.com/feng-gamer/p/6039380.html