Factory Method

最新推荐文章于 2024-04-19 15:31:43 发布

原创最新推荐文章于 2024-04-19 15:31:43 发布 · 282 阅读

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#class #string #user

本文介绍了一个简单的工厂模式实现，通过抽象基类Creator和Product定义了一种创建对象的接口，但让子类决定实例化哪一个类。该模式允许一个类的实例化过程延迟到其子类。

using System; using System.Collections.Generic; using System.Linq; using System.Text; namespace Factory { class Program { static void Main(string[] args) { // An array of creators Creator[] creators = new Creator[2]; creators[0] = new ConcreteCreatorA(); creators[1] = new ConcreteCreatorB(); // Iterate over creators and create products foreach (Creator creator in creators) { Product product = creator.FactoryMethod(); Console.WriteLine("Created {0}", product.GetType().Name); } // Wait for user Console.ReadKey(); } } /// <summary> /// The 'Product' abstract class /// </summary> abstract class Product { } /// <summary> /// A 'ConcreteProduct' class /// </summary> class ConcreteProductA : Product { } /// <summary> /// A 'ConcreteProduct' class /// </summary> class ConcreteProductB : Product { } /// <summary> /// The 'Creator' abstract class /// </summary> abstract class Creator { public abstract Product FactoryMethod(); } /// <summary> /// A 'ConcreteCreator' class /// </summary> class ConcreteCreatorA : Creator { public override Product FactoryMethod() { return new ConcreteProductA(); } } /// <summary> /// A 'ConcreteCreator' class /// </summary> class ConcreteCreatorB : Creator { public override Product FactoryMethod() { return new ConcreteProductB(); } } }