摘要:
开放封闭原则 Software entities (classes, modules, etc) should be open for extension, but closed for modification. 软件实体像类,模块等应该对扩展是开放的,而对修改是封闭的。 里氏替换原则 Derived classes must be usable through the ba... 阅读全文
posted @ 2007-08-07 11:27
许晓光
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