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工厂模式
2022-06-22 03:10:00 【qq_41285455】
1.简单工厂模式：根据参数返回具体实例
2.工厂方法模式
可以动态的添加参产品，不需要修改工厂的源码，复符合开闭原则
3.抽象工厂模式
抽象工厂模式是抽象工厂方法模式的升级版，每个抽象工厂里面可以生产一系列产品
举例：
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