标签:cti 抽象 section add ons get 实现 简单工厂 acl
#1.什么是工厂模式 #2.工厂模式的分类 ‘‘‘ 1. 简单工厂模式 2. 工厂方法模式 3. 抽象工厂方法模式 ‘‘‘ #3.简单工厂模式的python实现 from abc import ABCMeta, abstractmethod class Animal(metaclass=ABCMeta): @abstractmethod def do_say(self): pass class Dog(Animal): def do_say(self): print("wang wang!!") class Cat(Animal): def do_say(self): print("miao miao!!") ## 定义工厂 class ForestFactory(object): def make_sound(self, object_type): return eval(object_type)().do_say() ## client code if __name__ == "__main__": ff = ForestFactory() animal = input("Which animal should make_sound Dog or Cat?") ff.make_sound(animal) #4.工厂方法模式的python实现 from abc import ABCMeta, abstractmethod class Section(metaclass=ABCMeta): @abstractmethod def describe(self): pass class PersonSection(Section): def describe(self): print("personal section") class AlbumSection(Section): def describe(self): print("Album section") class PatentSection(Section): def describe(self): print("Patent section") class PublicationSection(Section): def describe(self): print("Publication section") # 创建一个抽象类, 并提供一个工厂方法 class Profile(metaclass=ABCMeta): def __init__(self): self.sections = [] self.createProfile() @abstractmethod def createProfile(self): pass def getSections(self): return self.sections def addsections(self, section): self.sections.append(section) class Zhihu(Profile): def createProfile(self): self.addsections(PersonSection()) self.addsections(AlbumSection()) self.addsections(PublicationSection()) class Csdn(Profile): def createProfile(self): self.addsections(PatentSection()) self.addsections(PersonSection()) if __name__ == ‘__main__‘: profile_type = input("which profile you‘d like to create (Zhihu or Csdn)") profile = eval(profile_type)() print("create profile..", type(profile).__name__) print("Profile has sections --", profile.getSections()) #5.抽象工厂模式的python实现 from abc import ABCMeta, abstractmethod class PizzaFactory(metaclass=ABCMeta): @abstractmethod def createVegPizza(self): pass @abstractmethod def createNonVegPizza(self): pass class IndianPizzaFactory(PizzaFactory): def createVegPizza(self): return DeluxVeggiePizza() def createNonVegPizza(self): return ChickenPizza() class USPizzaFactory(PizzaFactory): def createVegPizza(self): return MexicanVegPizza() def createNonVegPizza(self): return HamPizza() class VegPizza(metaclass=ABCMeta): @abstractmethod def prepare(self, VegPizza): pass class NonVegPizza(metaclass=ABCMeta): @abstractmethod def serve(self, VegPizza): pass class DeluxVeggiePizza(VegPizza): def prepare(self): print("Prepare ", type(self).__name__) class ChickenPizza(NonVegPizza): def serve(self, VegPizza): print(type(self).__name__, " is served with Chicken on ", type(VegPizza).__name__) class MexicanVegPizza(VegPizza): def prepare(self): print("Prepare ", type(self).__name__) class HamPizza(NonVegPizza): def serve(self, VegPizza): print(type(self).__name__, " is served with Ham on ", type(VegPizza).__name__) class PizzaStore: def __init__(self): pass def makePizzas(self): for factory in [IndianPizzaFactory(), USPizzaFactory()]: self.factory = factory self.NonVegPizza = self.factory.createNonVegPizza() self.VegPizza = self.factory.createVegPizza() self.VegPizza.prepare() self.NonVegPizza.serve(self.VegPizza) pizza = PizzaStore() pizza.makePizzas() #6.工厂方法与抽象工厂方法的比较 # 工厂方法开发了一个创建对象的方法 # 抽象工厂方法开放了一个或者多个方法创建一个系列的相关对象 # 工厂方法使用继承和子类来决定要创建哪个对象 # 抽象共产方法使用组合将创建对象的任务委托给其他类 # 共产方法用于创建一个产品 # 抽象工厂方法用于创建相关产品的系列 # #7.工厂模式的优缺点 ‘‘‘ 优点: 1.松耦合, 即对象的创建可以独立于类的实现 2.客户端无需了解创建对象的类的实现,但是依然可以创建对象 3.可以在工厂中添加其他类来创建其他类型的对象 4.工厂可以重用现有对象 ‘‘‘
标签:cti 抽象 section add ons get 实现 简单工厂 acl
原文地址:https://www.cnblogs.com/fireblackman/p/10543734.html