設計模式之簡單工廠

一、定義簡單工廠其實不是一個設計模式，反而比較像是一種編程習慣。

二、類圖

三、示例

/// <summary>/// 披薩商店/// </summary>public class PizzaStore{public PizzaStore(){}public Pizza OrderPizza(string type){Pizza pizza;pizza = SimplePizzaFactory.CreatePizza(type);pizza.PRepare();pizza.Bake();pizza.Cut();pizza.Box();return pizza;}}/// <summary>/// 披薩工廠/// </summary>public static class SimplePizzaFactory{public static Pizza CreatePizza(string type){Pizza pizza = null;if (type.Equals("cheese")){pizza = new CheesePizza();}else if (type.Equals("pepperoni")){pizza = new Pepperonipizza();}return pizza;}}/// <summary>/// 抽象披薩/// </summary>public abstract class Pizza{public abstract void Prepare();public abstract void Bake();public abstract void Cut();public abstract void Box();}/// <summary>/// 芝士披薩/// </summary>public class CheesePizza:Pizza{public override void Prepare(){Console.WriteLine("準備芝士披薩");}public override void Bake(){Console.WriteLine("烘培芝士披薩");}public override void Cut(){Console.WriteLine("切芝士披薩");}public override void Box(){Console.WriteLine("打包芝士披薩");}}/// <summary>/// 意大利香腸披薩/// </summary>public class PepperoniPizza:Pizza{public override void Prepare(){Console.WriteLine("準備意大利香腸披薩");}public override void Bake(){Console.WriteLine("烘培意大利香腸披薩");}public override void Cut(){Console.WriteLine("切意大利香腸披薩");}public override void Box(){Console.WriteLine("打包意大利香腸披薩");}}static void Main(string[] args){PizzaStore pizzaStore = new PizzaStore();Pizza pizza = pizzaStore.OrderPizza("cheese");Console.ReadLine();}

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