工厂模式..........................................................................................................................................3简单工厂模式...........................................................................................................................3定义..........................................................................................................................................3角色..........................................................................................................................................3示例一......................................................................................................................................3简单工厂模式其好处...............................................................................................................4工厂措施模式..................................................................................................................................5定义..........................................................................................................................................5角色..........................................................................................................................................5示例一......................................................................................................................................6工厂措施模式的缺陷...............................................................................................................6抽象工厂模式..................................................................................................................................7角色..........................................................................................................................................7开闭原则的倾斜性...................................................................................................................8长处和缺陷................................
