#设计模式#之抽象工厂模式

基础概念：抽象工厂类、具体工厂类、抽象产品类、具体产品类

适用领域：不断增加产品种类

 

第一步：创建抽象产品类以及一个具体产品类

    //抽象产品类，只有一个功能获取token
    public abstract class abstractPlatform
    {
        public abstract string GetAccessToken(string code);
    }

    public class Tencent : abstractPlatform
    {
      public override string GetAccessToken(string code)
      {
       return this + " qq token";
      }
   }

第二步：创建一个抽象工厂类与具体工厂类

   // 抽象工厂类
    public abstract class Platform
    {
        public abstract abstractPlatform createPlatform();
    }

   //具体工厂类
    public class TencentFactory : Platform
    {
        public override abstractPlatform createPlatform()
        {
            return new Tencent();
        }
    }

第三步：创建用户调用类

    //客户端调用
    public class ClientPlatform
    {
        abstractPlatform _instance;

        public ClientPlatform(Platform platform)
        {
            _instance = platform.createPlatform();
        }

        //具体业务逻辑
        public string GetAccessToken(string code)
        {
            return _instance.GetAccessToken(code);
        }
    }

示例代码

  public static void Main(string[] args)
        {
            
            Platform platform = new TencentFactory(); //腾讯
            ClientPlatform client = new ClientPlatform(platform);
            string code = client.GetAccessToken("code");
            Console.WriteLine(code);

        
            Console.ReadLine();
        }

//增加一个产品

1、增加一个具体工厂类、具体产品类即可

 public class Sina : abstractPlatform
    {
       public override string GetAccessToken(string code)
       {
           return this + " sina token";
       }
    }

 public class SinaFactory : Platform
    {
        public override abstractPlatform createPlatform()
        {
            return new Sina();
        }
    }

示例代码

 public static void Main(string[] args)
        {
            //1.
            Platform platform = new TencentFactory(); //腾讯
            ClientPlatform client = new ClientPlatform(platform);
            string code = client.GetAccessToken("code");
            Console.WriteLine(code);

            //2.新增的产品类
            platform = new SinaFactory();             //新浪
            client = new ClientPlatform(platform);
            code = client.GetAccessToken("code");
            Console.WriteLine(code);

       
            Console.ReadLine();
        }