摘要：
http://www.cnblogs.com/wangkunyu/archive/2013/07/22/3206477.html“open-close"prinple (OCP) Open-Closed Principle tells that:a software entity should open to extend and close to modify.advantage: by extending existing software system,we can offer new actions,in order to meet new meet to software, 阅读全文
posted @ 2013-07-23 14:52
冠冕堂皇
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