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example12.py
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"""
面向对象的三大支柱:封装、继承、多态
面向对象的设计原则:SOLID原则
面向对象的设计模式:GoF设计模式(单例、工厂、代理、策略、迭代器)
月薪结算系统 - 部门经理每月15000 程序员每小时200 销售员1800底薪加销售额5%提成
"""
from abc import ABCMeta, abstractmethod
class Employee(metaclass=ABCMeta):
"""员工(抽象类)"""
def __init__(self, name):
self.name = name
@abstractmethod
def get_salary(self):
"""结算月薪(抽象方法)"""
pass
class Manager(Employee):
"""部门经理"""
def get_salary(self):
return 15000.0
class Programmer(Employee):
"""程序员"""
def __init__(self, name, working_hour=0):
self.working_hour = working_hour
super().__init__(name)
def get_salary(self):
return 200.0 * self.working_hour
class Salesman(Employee):
"""销售员"""
def __init__(self, name, sales=0.0):
self.sales = sales
super().__init__(name)
def get_salary(self):
return 1800.0 + self.sales * 0.05
class EmployeeFactory():
"""创建员工的工厂(工厂模式 - 通过工厂实现对象使用者和对象之间的解耦合)"""
@staticmethod
def create(emp_type, *args, **kwargs):
"""创建员工"""
emp_type = emp_type.upper()
emp = None
if emp_type == 'M':
emp = Manager(*args, **kwargs)
elif emp_type == 'P':
emp = Programmer(*args, **kwargs)
elif emp_type == 'S':
emp = Salesman(*args, **kwargs)
return emp