装饰模式

Posted 2020-10-07 韩乾

 

可以将所需的功能，按正确的顺序串联起来进行控制

动态的给对象增加功能，与使用子类相比装饰模式更为灵活

 

 

代码示例

class Person(object):
    def __init__(self,name):
        self.name = name
    def show(self):
        print("%s 的装扮" %self.name)
class Finery(Person):
    component = None
    def decorate(self,component):
        self.component = component
    def show(self):
        if self.component != None:
            self.component.show()
class WearTShirts(Finery):
    def __init__(self):
        pass
    def show(self):
        print("T恤")
        self.component.show()
class WearBigTrouser(Finery):
    def __init__(self):
        pass
    def show(self):
        print("垮裤")
        self.component.show()
class WearSuit(Finery):
    def __init__(self):
        pass
    def show(self):
        print("西装")
        self.component.show()
class WearLeatherShoes(Finery):
    def __init__(self):
        pass
    def show(self):
        print("皮鞋")
        self.component.show()
f1 = Person("han")
# 找衣服
px = WearLeatherShoes()
xz = WearSuit()
tx = WearTShirts()
# 开始穿衣服，装饰过程
tx.decorate(f1)
px.decorate(tx)
xz.decorate(px)
xz.show()