factorymethod-avocados.cs

最新推荐文章于 2023-04-15 02:06:48 发布

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最新推荐文章于 2023-04-15 02:06:48 发布

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原文链接：http://www.cnblogs.com/shihao/archive/2012/05/14/2500462.html

本文介绍了一个使用C#实现的工厂模式案例，通过该模式根据不同月份选择不同的产品供应商。案例展示了如何定义产品接口及其实现类，并通过创建者类来决定实例化哪个具体的产品类。

using System;
using System.Collections;

class FactoryPattern {

// Factory Method Pattern       Judith Bishop 2006
// Example of exporting from different suppliers

interface IProduct {
    string ShipFrom();
}

class ProductA : IProduct {
    public String ShipFrom () {
      return " from South Africa";
    }
}

class ProductB : IProduct {
    public String ShipFrom () {
            return "from Spain";
    }
}

class DefaultProduct : IProduct {
    public String ShipFrom () {
            return "not available";
    }
}

class Creator {
    public IProduct FactoryMethod(int month) {
      if (month >= 4 && month <=11)
        return new ProductA();
      else
      if (month == 1 || month == 2 || month == 12)
        return new ProductB();
      else
        return new DefaultProduct();
    }
}

    static void Main() {
      Creator c = new Creator();
      IProduct product;

      for (int i=1; i<=12; i++) {
        product = c.FactoryMethod(i);
        Console.WriteLine("Avocados "+product.ShipFrom());
      }
    }
}

/* Output
Avocados from Spain
Avocados from Spain
Avocados not available
Avocados from South Africa
Avocados from South Africa
Avocados from South Africa
Avocados from South Africa
Avocados from South Africa
Avocados from South Africa
Avocados from South Africa
Avocados from South Africa
Avocados from Spain
*/

转载于:https://www.cnblogs.com/shihao/archive/2012/05/14/2500462.html