Python设计模式编程中Adapter适配器模式的使用实例
将一个类的接口转换成客户希望的另外一个接口。使得原本由于接口不兼容而不能一起工作的那些类可以一起工作。
应用场景：希望复用一些现存的类，但是接口又与复用环境要求不一致。
模式特点：将一个类的接口转换成为客户希望的另外一个接口。
分类：类适配器（通过多重继承）、对象适配器。
来通过例子说明，下面是用户通过适配器使用一个类的方法
class Target: def Request(): print "common request." class Adaptee(Target): def SpecificRequest(self): print "specific request." class Adapter(Target): def __init__(self,ada): self.adaptee = ada def Request(self): self.adaptee.SpecificRequest() if __name__ == "__main__": adaptee = Adaptee() adapter = Adapter(adaptee) adapter.Request()
类图：
实例：
我们再来看一个简单的Adapter例子
#encoding=utf-8
#
#by panda
#适配器模式
def printInfo(info):
print unicode(info, 'utf-8').encode('gbk')
#球员类
class Player():
name = ''
def __init__(self,name):
self.name = name
def Attack(self,name):
pass
def Defense(self):
pass
#前锋
class Forwards(Player):
def __init__(self,name):
Player.__init__(self,name)
def Attack(self):
printInfo("前锋%s 进攻" % self.name)
def Defense(self,name):
printInfo("前锋%s 防守" % self.name)
#中锋（目标类）
class Center(Player):
def __init__(self,name):
Player.__init__(self,name)
def Attack(self):
printInfo("中锋%s 进攻" % self.name)
def Defense(self):
printInfo("中锋%s 防守" % self.name)
#后卫
class Guards(Player):
def __init__(self,name):
Player.__init__(self,name)
def Attack(self):
printInfo("后卫%s 进攻" % self.name)
def Defense(self):
printInfo("后卫%s 防守" % self.name)
#外籍中锋（待适配类）
#中锋
class ForeignCenter(Player):
name = ''
def __init__(self,name):
Player.__init__(self,name)
def ForeignAttack(self):
printInfo("外籍中锋%s 进攻" % self.name)
def ForeignDefense(self):
printInfo("外籍中锋%s 防守" % self.name)
#翻译（适配类）
class Translator(Player):
foreignCenter = None
def __init__(self,name):
self.foreignCenter = ForeignCenter(name)
def Attack(self):
self.foreignCenter.ForeignAttack()
def Defense(self):
self.foreignCenter.ForeignDefense()
def clientUI():
b = Forwards('巴蒂尔')
m = Guards('麦克格雷迪')
ym = Translator('姚明')
b.Attack()
m.Defense()
ym.Attack()
ym.Defense()
return
if __name__ == '__main__':
clientUI();
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