工厂方法模式

工厂模式有四个角色:抽象工厂，具体工厂，抽象产品，具体产品

1.抽象工厂

namespace 验证工厂模式
{
    public abstract class AbstractCarFactory
    {
        public abstract Car CreateCarInstance();
    }
}

2.具体工厂

namespace 验证工厂模式
{
    using System.Reflection;
 
    public class BenzCarFactory:AbstractCarFactory
    {
        public override Car CreateCarInstance()
        {
            return new BenzCar();
        }
    }
}
namespace 验证工厂模式
{
public class HavarCarFactory:AbstractCarFactory
    {
        public override Car CreateCarInstance()
        {
           return new HavarCar();
        }
    }
}

3.抽象产品

namespace 验证工厂模式
{
    public abstract class Car
    {
        public abstract void MingDi();
    }
}

4.具体产品

namespace 验证工厂模式
{
    class BenzCar:Car
    {
        public override void MingDi()
        {
            Console.WriteLine("奔驰车，嗡嗡");
        }
    }
}
namespace 验证工厂模式
{
    class HavarCar:Car
    {
        public override void MingDi()
        {
            Console.WriteLine("哈佛H6，滴滴");
        }
    }
}

 

5.具体实现

public class Program
    {
        static void Main(string[] args)
        {
            AbstractCarFactory factory=new BenzCarFactory();
            Car car=factory.CreateCarInstance();
            car.MingDi();
            //反射加载类【Load函数的参数时程序集名，createInstance的参数是 "命名空间."+"类名"】
            AbstractCarFactory factory2 =
                (HavarCarFactory)Assembly.Load("验证工厂模式").CreateInstance("验证工厂模式.HavarCarFactory");
            Car car2=factory2.CreateCarInstance();
            car2.MingDi();
            Console.ReadKey();
        }
    }