设计模式－简单工厂模式（SimpleFactory-C#)
自己CSDN blog上回收来的，以后都集中到这里了。参考资料
《java与模式》
上面那本书上的例子举的是园丁和果园的例子，学习设计模式最好在生活中自己找个例子实践一下，下面是我自己的一个例子，是讲快餐店的例子，快餐店提供很多食物，比如面条，米饭，面包。首先定义了一个Food接口，然后这些食物都从它来继承，定义了一个大厨他包办所有食物的制作工作，这就是我所理解的简单工厂模式的概念，下面是源代码：
using System;namespace SimpleFactoryPattern{ /// <summary> /// 简单工厂模式示例 /// </summary> class SimpleFactoryPattern {//定义Food接口 public interface Food { //烹饪 void Cook(); //卖出 void Sell(); }//Noodlepublic class Noodle:Food{ publicNoodle() { Console.WriteLine("\nThe Noodle is made.."); } private int price; //面条Noodle的Cook方法接口实现 public void Cook() { Console.WriteLine("\nNoodle is cooking..."); } //面条Noodle的Sell方法接口实现 public void Sell() { Console.WriteLine("\nNoodle has been sold..."); } public int Price { get{return this.price;} set{price=value;} }}//Ricepublic class Rice:Food{ public Rice() { Console.WriteLine("\nThe Rice is made .."); } private int price; public void Cook() { Console.WriteLine("\nRice is cooking..."); } public void Sell() { Console.WriteLine("\nRice has been sold..."); } public int Price { get{return this.price;} set{price=value;} }} //Breadpublic class Bread:Food{ public Bread() { Console.WriteLine("\nThe Bread is made...."); } private int price; public void Cook() { Console.WriteLine("\nBread is cooking..."); } public void Sell() { Console.WriteLine("\nBread has been sold..."); } public int Price { get{return this.price;} set{price=value;} }}//定义大厨，他包办这个快餐店里的所有Food,包括面条，面包和米饭class Chef{ public static Food MakeFood(string foodName) { try { switch(foodName) { case "noodle": return new Noodle(); case "rice":return new Rice(); case "bread":return new Bread(); default:throw new BadFoodException("Bad food request!"); } } catch(BadFoodException e) { throw e; } } }//异常类，该餐馆没有的食品class BadFoodException: System.Exception{ public BadFoodException(string strMsg) { Console.WriteLine(strMsg); }}/// <summary>/// 应用程序的主入口点。/// </summary>static void Main(string[] args){ Food food=Chef.MakeFood("bread"); food.Cook(); food.Sell(); Console.ReadLine();} }}
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