C# 设计模式（3）工厂方法模式

1. 基于开闭原则 OCP： 对扩展开放，对修改封闭。

2. 基于单一原则

代码实现：WarCraft3 服务

namespace FactoryMethod.Warcraft3Service
{
    public interface IRace
    {
        void InterWar();
    }
    public class Human:IRace
    {
        public void InterWar()
        {
            Console.WriteLine($"I'm Sky, using Human");
        }
    }
    public class NE:IRace
    {
        public void InterWar()
        {
            Console.WriteLine($"I'm Moon, using NE");
        }
    }
}

工厂方法：

namespace FactoryMethodPattern.FactoryMethod
{
   public interface IRaceFactory
    {
        IRace GetInstance();
    }

    public class HumanFactory: IRaceFactory
    {
        public IRace GetInstance()
        {
            IRace race = new Human();
            return race;
        }
    }

    public class NEFactory:IRaceFactory
    {
        public virtual IRace GetInstance()
        {
            IRace race = new NE();
            return race;
        }
    }

    public class SuperNEFactory : NEFactory
    {
        public override IRace GetInstance()
        {
            return base.GetInstance();
        }
    }
}

调用工厂：

    class Program
    {
        static void Main(string[] args)
        {
            IRaceFactory humanFactory = new HumanFactory();
            humanFactory.GetInstance().InterWar();

            IRaceFactory superNeFactory = new SuperNEFactory();
            superNeFactory.GetInstance().InterWar();
        }
    }

结果：