设计模式之工厂模式代码

Animal是父类，Dog和Cat继承父类，然后创建一个工厂类，通过静态方法来设置匹配规则，
同样的示例化方式和调用方式，根据传入的内容的不同，结果也不一样。

class Animal:
    def __init__(self, name):
        self.__name = name

    def getName(self):
        return self.__name


class Dog(Animal):
    def __init__(self, name):
        super().__init__(name)

    def getName(self):
        return "dog"


class Cat(Animal):
    def __init__(self, name):
        super().__init__(name)

    def getName(self):
        return "cat"


class AnimailMake:
    @staticmethod
    def makeanimial(name):
        am = None
        if name == "cat":
            am = Cat(name)
        elif name == "dog":
            am = Dog(name)
        else:
            am = Animal(name)
        return am


if __name__ == '__main__':
    am = AnimailMake.makeanimial("cat")
    print(am.getName())
    am = AnimailMake.makeanimial("dog")
    print(am.getName())
    am = AnimailMake.makeanimial("?")
    print(am.getName())