python设计模式第七天建造者模式

Posted 2020-12-29 liuzhiqaingxyz

1. 建造者模式UML图

2.应用场景

（1）专门创建具有符合属性的对象

3.代码实现

 

#!/usr/bin/env python
#! _*_ coding: UTF-8 _*_

from abc import ABCMeta, abstractmethod

class House(object):

    def __init__(self):
        pass

    def makeFloor(self, floor):
        self.floor = floor

    def makeWall(self, wall):
        self.wall = wall

    def getFloor(self):
        return self.floor

    def getWall(self):
        return self.wall

class Builder(object):

    __metaclass__ = ABCMeta

    @abstractmethod
    def makeFloor(self):
        pass

    @abstractmethod
    def makeWall(self):
        pass

    @abstractmethod
    def getHouse(self):
        pass

    @abstractmethod
    def getHouse(self):
        pass


class PingFangBuilder(Builder):

    def __init__(self):
        self.house = House()

    def makeFloor(self):
        self.house.makeFloor("平房地板")

    def makeWall(self):
        self.house.makeWall("平房墙")

    def getHouse(self):
        return self.house


class Director(object):

    def __init__(self, builder):
        self.__builder = builder

    def makeHouse(self):
        self.__builder.makeFloor()
        self.__builder.makeWall()


if __name__ == "__main__":
    ‘‘‘使用最原始的方式‘‘‘
    house = House()
    house.makeFloor("地板")
    house.makeWall("墙")
    print house.getFloor()
    print house.getWall()


    ‘‘‘使用建造者模式‘‘‘
    builder = PingFangBuilder()
    director = Director(builder)
    director.makeHouse()
    house = builder.getHouse()
    print house.getFloor()
    print house.getWall()

结果：

/Users/liudaoqiang/PycharmProjects/numpy/venv/bin/python /Users/liudaoqiang/Project/python_project/day7_builder/builder_test.py
地板
墙
平房地板
平房墙

Process finished with exit code 0