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http://www.cnblogs.com/ggjucheng/archive/2013/02/01/2888051.html

http://blog.youkuaiyun.com/desilting/article/details/45505121

http://paddy-w.iteye.com/blog/2081409

http://blog.youkuaiyun.com/scgaliguodong123_/article/details/46993005

http://blog.youkuaiyun.com/cheersu/article/details/8333045