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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