Python 实现：
# Python原生默认不支持接口，默认多继承，所有的方法都必须不能实现
from abc import abstractmethod,ABCMeta
# 创建一个接口Shape
class Shape(metaclass=ABCMeta):
@abstractmethod
def draw(self):
pass
#创建Shape的实体类
class Rectangle(Shape):
def draw(self):
print("Inside Rectangel:draw() method.")
class Square(Shape):
def draw(self):
print("Inside Square:draw() method.")
class Circle(Shape):
def draw(self):
print("Inside Circle:draw() method.")
# 创建一个接口Color
class Color(metaclass=ABCMeta):
@abstractmethod
def fill(self):
pass
# 创建Color的实体类
class Red(Color):
def fill(self):
print("Inside Red.fill() method.")
class Green(Color):
def fill(self):
print("Inside Green.fill() method.")
class Blue(Color):
def fill(self):
print("Inside Blue.fill() method.")
#创建抽象工厂
class AbstractFactory(metaclass=ABCMeta):
@abstractmethod
def getColor(self,color):
pass
@abstractmethod
def getShape(self,shape):
pass
#创建抽象工厂实例 ShapeFactory,ColorFactory
class ShapeFactory(AbstractFactory):
def getShape(self,shapeType):
if shapeType == None :
return None
elif shapeType.upper() == "CIRCLE":
return Circle()
elif shapeType.upper() == "RECTANGLE":
return Rectangle()
elif shapeType.upper() == "SQUARE":
return Square()
return None
def getColor(self,colorType):
pass
class ColorFactory(AbstractFactory):
def getShape(self,shapeType):
pass
def getColor(self,colorType):
if colorType == None:
return None
elif colorType.upper() == "RED":
return Red()
elif colorType.upper() == "GREEN":
return Green()
elif colorType.upper() == "BLUE":
return Blue()
return None
# 创建工厂创造器/生产器类
class FactoryProducer():
@staticmethod
# 这里不能写成 def getFactory(self,choiceType): 否则会报错
# 因为是静态方法，被直接调用，所以不能带self参数
# 如果不是静态方法，必须加self参数，且需要先实例化对象，再用实例化的对象调用方法
def getFactory(choiceType):
if choiceType.upper() == "SHAPE":
return ShapeFactory()
elif choiceType.upper() == "COLOR":
return ColorFactory()
return None
# 调用输出
if __name__ == '__main__':
shapeFactory = FactoryProducer.getFactory('SHAPE')
shape1 = shapeFactory.getShape("CIRCLE")
shape1.draw()
shape2 = shapeFactory.getShape("RECTANGLE")
shape2.draw()
shape3 = shapeFactory.getShape("SQUARE")
shape3.draw()
colorFactory = FactoryProducer.getFactory("COLOR")
color1 = colorFactory.getColor("RED")
color1.fill()
color2 = colorFactory.getColor("Green")
color2.fill()
color3 = colorFactory.getColor("BLUE")
color3.fill()Siskin.xu Siskin.xu
sis***@sohu.com
5年前 (2020-02-29)