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http://blog.csdn.net/mikulee/article/details/40149779

http://blog.csdn.net/mikulee/article/details/40150791

http://my.oschina.net/ybusad/blog/290495

http://blog.csdn.net/lee576/article/details/1839793

http://www.cnblogs.com/rebeldom/articles/37792.html

http://www.cnblogs.com/dazhaxie/archive/2012/06/27/2566054.html

http://wenku.baidu.com/view/7a6a15a20029bd64783e2cbd.html

http://wenku.baidu.com/view/a5902610cc7931b765ce15ef.html