http://blog.csdn.net/wty19/article/details/6820399

http://www.cnblogs.com/technology/archive/2012/07/12/2588022.html

http://blog.sina.com.cn/s/blog_4a540be60100vjae.html

http://www.cnblogs.com/wuchaodong/archive/2010/04/02/1444792.html

http://blog.sina.com.cn/s/blog_4da4ea3c0100me71.html

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