命令模式的概念



Python 方式：

# Command Pattern with Python Code from abc import abstractmethod,ABCMeta # 创建一个命令接口Order class Order(metaclass=ABCMeta): @abstractmethod def execute(self): pass # 创建一个请求类 class Stock(): _name = "ABC" _quantity = 10 def buy(self): print("Stock [Name : {0}, Quantity: {1}] bought.".format(self._name,self._quantity)) def sell(self): print("Stock [Name : {0}, Quantity: {1}] sold.".format(self._name, self._quantity)) # 创建实现了Order接口的实体类 class BuyStock(Order): _abcStock = None def __init__(self,inStock): self._abcStock = inStock def execute(self): self._abcStock.buy() class SellStock(Order): _abcStock = None def __init__(self,inStock): self._abcStock = inStock def execute(self): self._abcStock.sell() # 创建命令调用类 class Broker(): _orderList = [] def takeOrder(self,inOrder): self._orderList.append(inOrder) def placeOrders(self): for aOrder in self._orderList: aOrder.execute() self._orderList.clear() # 调用输出 if __name__ == '__main__': abcStock = Stock() buyStockOrder = BuyStock(abcStock) sellStockOrder = SellStock(abcStock) broker = Broker() broker.takeOrder(buyStockOrder) broker.takeOrder(sellStockOrder) broker.placeOrders()

版权声明：

本文来源网络，所有图片文章版权属于原作者，如有侵权，联系删除。

本文网址：https://www.mushiming.com/mjsbk/3972.html