Python设计模式13(中介者模式-行为型)
将其他对象之间的交互装在中介者对象中，达到松耦合、隐式引用、独立变化，与代理模式有相似之感，但是代理模式是结构性模式，侧重于对对象调用的接口控制，而中介者模式是行为性模式，解决对象与对象之间相互调用的行为问题.
1、例子
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class Consumer:
"""消费者类"""
def __init__(self, product, price):
self.name = "消费者"
self.product = product
self.price = price
def shopping(self, name):
"""买东西"""
print("向{} 购买 {}价格内的 {}产品".format(name, self.price, self.product))
class Producer:
"""生产者类"""
def __init__(self, product, price):
self.name = "生产者"
self.product = product
self.price = price
def sale(self, name):
"""卖东西"""
print("向{} 销售 {}价格的 {}产品".format(name, self.price, self.product))
class Mediator:
"""中介者类"""
def __init__(self):
self.name = "中介者"
self.consumer = None
self.producer = None
def sale(self):
"""进货"""
self.consumer.shopping(self.producer.name)
def shopping(self):
"""出货"""
self.producer.sale(self.consumer.name)
def profit(self):
"""利润"""
print('中介净赚：{}'.format((self.consumer.price - self.producer.price )))
def complete(self):
self.sale()
self.shopping()
self.profit()
if __name__ == '__main__':
consumer = Consumer('手机', 3000)
producer = Producer("手机", 2500)
mediator = Mediator()
mediator.consumer = consumer
mediator.producer = producer
mediator.complete()
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2、应用场景