大话设计模式读书笔记6----工厂方法模式(Factory Method)

工厂方法模式(Factory Method):定义一个用于创建对象的接口，让子类决定实例化哪一个类。（解决了简单工厂模式违反OCP的问题）

using System;
using System.Collections.Generic;
using System.Text;

namespace Factory
{
    class Program
    {
        static void Main(string[] args)
        {
            Ifactory factory = new Undergraduate();
            LeiFeng student = factory.CreateLeiFeng();
            student.BuyRice();
            student.Sweep();
            Console.ReadLine();

        }
    }
    public class LeiFeng
    {
        public void Sweep()
        {
            Console.WriteLine("扫地");
        }
        public void Wash()
        {
            Console.WriteLine("洗衣");
        }
        public void BuyRice()
        {
            Console.WriteLine("买米");
        }
    }
    //雷锋工厂
    public interface Ifactory
    {
        LeiFeng CreateLeiFeng();
    }
    public class Undergraduate:LeiFeng,Ifactory   //类放在前  接口放在后。
    {
        public LeiFeng CreateLeiFeng()
        {
            return new Undergraduate();
        }
 
    }
    public class Volunteer :LeiFeng,Ifactory
    {
        public LeiFeng CreateLeiFeng()
        {
            return new Volunteer();
        }
 
    }
}