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摘要： Intent （定义） Define an interface for creating an object（定义一个接口去创建对象）, but let subclasses decide which class to instantiate.（但是由子类决定哪个类将被实例化） Factory Me 阅读全文

摘要： Intent （定义） Separate the construction of a complex object from its representation，so that the same construction process can create different represent 阅读全文