设计模式之 工厂方法模式

内容图解：

 

代码：

用工厂方法模式产生魔兽不同种族

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
/*
 * author:zzy
 * describe:factory method pattern
 * 
 * other: if want to add a new race named FifthRace,
 * you can define a class named "FifthRace" that implements
 * the interface IWar3Race,then,accomplish the Said method.
 * besides this,you need to define a class "FifthRaceFactory"
 * and implements the method GetRace(); 
 * do not need to modify the code that have existed
 * ##对修改关闭，对扩展开放##
 * 
 */
namespace FactoryMethod
{
    class Program
    {
        #region client
        static IFactory factory;
        static IWar3Race war3Race;
        static void Main(string[] args)
        {
            factory = new HumFactory();//hum
            war3Race=factory.getRace();
            war3Race.Said();

            factory = new OrcFactory();//orc
            war3Race=factory.getRace();
            war3Race.Said();

            factory = new UdFactory();//ud
            war3Race=factory.getRace();
            war3Race.Said();

            factory = new NeFactory();//ne
            war3Race=factory.getRace();
            war3Race.Said();

            Console.Read();
        }
        #endregion client
    }


#region product
/// <summary>
/// product interface
/// </summary>
public interface  IWar3Race
{
    void Said();
}

/// <summary>
/// one product class named Hum
/// </summary>
public class Hum : IWar3Race
{
    public void Said()
    {
        Console.Write("I am AM\r\n");
    }
}

/// <summary>
/// one product class named Orc
/// </summary>
public class Orc : IWar3Race
{
    public void Said()
    {
        Console.Write("I am BM\r\n");
    }
}

/// <summary>
/// one product class named Ud
/// </summary>
public class Ud : IWar3Race
{
    public void Said()
    {
        Console.Write("I am DK\r\n");
    }
}


/// <summary>
/// one product class named Ne
/// </summary>
public class Ne : IWar3Race
{
    public void Said()
    {
        Console.Write("I am DH\r\n");
    }
}
#endregion product

#region factory
/// <summary>
/// factroy interface
/// </summary>
public interface IFactory
{
    IWar3Race getRace();
}

/// <summary>
/// the factory used to product Hum
/// </summary>
public class HumFactory:IFactory
{
    public IWar3Race getRace()
    {
        return new Hum();
    }
}

/// <summary>
/// the factory used to product Orc
/// </summary>
public class OrcFactory:IFactory
{
    public IWar3Race getRace()
    {
        return new Orc();
    }
}

/// <summary>
/// the factory used to product Ud
/// </summary>
public class UdFactory : IFactory
{
    public IWar3Race getRace()
    {
        return new Ud();
    }
}

/// <summary>
/// the factory used to product Ne
/// </summary>
public class NeFactory : IFactory
{
    public IWar3Race getRace()
    {
        return new Ne();
    }
}
    #endregion factory
}

 运行结果：