C# 设计模式之【工厂方法模式】

using System;using System.Collections.Generic;using System.Text;namespace 工厂方法_雷锋工厂{ class Program { static void Main(string[] args) { // //基本方式:薛磊风代表大学生学习雷锋 LeiFeng xueleifeng = new Undergraduate(); xueleifeng.BuyRice(); xueleifeng.Sweep(); xueleifeng.Wash(); LeiFeng student1 = new Undergraduate(); student1.BuyRice(); LeiFeng student2 = new Undergraduate(); student2.Sweep(); LeiFeng student3 = new Undergraduate(); student3.Wash(); //简单工厂模式 LeiFeng studentA = SimpleFactory.CreateLeiFeng("学雷锋的大学生"); studentA.BuyRice(); LeiFeng studentB = SimpleFactory.CreateLeiFeng("学雷锋的大学生"); studentB.Sweep(); LeiFeng studentC = SimpleFactory.CreateLeiFeng("学雷锋的大学生"); studentC.Wash(); //工厂方法模式 IFactory factory = new UndergraduateFactory(); LeiFeng student = factory.CreateLeiFeng(); student.BuyRice(); student.Sweep(); student.Wash(); Console.Read(); } } //雷锋 class LeiFeng { public void Sweep() { Console.WriteLine("扫地"); } public void Wash() { Console.WriteLine("洗衣"); } public void BuyRice() { Console.WriteLine("买米"); } } //学雷锋的大学生 class Undergraduate : LeiFeng { } //社区志愿者 class Volunteer : LeiFeng { } //简单雷锋工厂 class SimpleFactory { public static LeiFeng CreateLeiFeng(string type) { LeiFeng result = null; switch (type) { case "学雷锋的大学生": result = new Undergraduate(); break; case "社区志愿者": result = new Volunteer(); break; } return result; } } //雷锋工厂 interface IFactory { LeiFeng CreateLeiFeng(); } //学雷锋的大学生工厂 class UndergraduateFactory : IFactory { public LeiFeng CreateLeiFeng() { return new Undergraduate(); } } //社区志愿者工厂 class VolunteerFactory : IFactory { public LeiFeng CreateLeiFeng() { return new Volunteer(); } }}