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http://www.cnblogs.com/xwdreamer/archive/2012/05/30/2526822.html
http://blog.csdn.net/liulin_good/article/details/6213815
http://www.cnblogs.com/meng72ndsc/archive/2010/12/23/1914477.html
http://www.cnblogs.com/ningvsban/archive/2013/05/06/3062535.html
http://www.jb51.net/article/32652.htm
HashMap通常比TreeMap快一点(树和哈希表的数据结构使然),建议多使用HashMap,在需要排序的Map时候才用TreeMap
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原文地址:http://www.cnblogs.com/gnivor/p/4331101.html