设计模式之桥接模式

来源：互联网发布：淘宝联盟能赚钱吗编辑：程序博客网时间：2024/06/08 14:01

桥接模式：将抽象部分与它的实现部分分离，使它们都可以独立地变化。它是一种对象结构型模式，又称为柄体(Handle and Body)模式或接口(Interface)模式。
例子：
例:模拟毛笔：
现需要提供大中小3种型号的画笔，能够绘制5种不同颜色，如果使用蜡笔，我们需要准备3*5=15支蜡笔，也就是说必须准备15个具体的蜡笔类。而如果使用毛笔的话，只需要3种型号的毛笔，外加5个颜料盒，用3+5=8个类就可以实现15支蜡笔的功能。使用桥接模式设计和实现来模拟毛笔的使用过程。
类图：

using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Threading.Tasks;namespace 桥接模式{    class Program    {        static void Main(string[] args)        {            ChPen pen;            Color c = new white();            pen = new sPen();            pen.Draw(c);            pen = new mPen();            pen.Draw(c);            pen = new lpen();            pen.Draw(c);            Console.ReadKey();        }    }    interface Color    {        void Dye();//着色    }    interface ChPen    {        void Draw(Color color);    }   class sPen:ChPen   {       public static string type = "小号毛笔";       public  void Draw(Color color)       {           color = new white();           color.Dye();           Console.WriteLine("{0}绘画",sPen.type);           color = new black();           color.Dye();           Console.WriteLine("{0}绘画", sPen.type);           color = new yellow();           color.Dye();           Console.WriteLine("{0}绘画", sPen.type);           color = new green();           color.Dye();           Console.WriteLine("{0}绘画", sPen.type);           color = new red();           color.Dye();           Console.WriteLine("{0}绘画", sPen.type);       }   }    class mPen:ChPen    {        public static string type = "中号毛笔";        public  void Draw(Color color)        {            color = new white();            color.Dye();            Console.WriteLine("{0}绘画", mPen.type);            color = new black();            color.Dye();            Console.WriteLine("{0}绘画", mPen.type);            color = new yellow();            color.Dye();            Console.WriteLine("{0}绘画", mPen.type);            color = new green();            color.Dye();            Console.WriteLine("{0}绘画", mPen.type);            color = new red();            color.Dye();            Console.WriteLine("{0}绘画", mPen.type);        }    }    class lpen:ChPen    {        public static string type = "大号毛笔";        public  void Draw(Color color)        {            color = new white();            color.Dye();            Console.WriteLine("{0}绘画", lpen.type);            color = new black();            color.Dye();            Console.WriteLine("{0}绘画", lpen.type);            color = new yellow();            color.Dye();            Console.WriteLine("{0}绘画", lpen.type);            color = new green();            color.Dye();            Console.WriteLine("{0}绘画", lpen.type);            color = new red();            color.Dye();            Console.WriteLine("{0}绘画", lpen.type);        }    }    class red : Color    {        public static string color = "红色";        public  void Dye()        {            Console.WriteLine("着色{0}", red.color);        }    }    class green : Color    {        public static string color = "黄色";        public  void Dye()        {            Console.WriteLine("着色{0}", green.color);        }    }    class yellow : Color    {        public static string color = "黄色";        public  void Dye()        {            Console.WriteLine("着色{0}",yellow.color);        }    }    class black : Color    {        public static string color = "黑色";        public  void Dye()        {            Console.WriteLine("着色{0}", black.color);        }    }    class white:Color    {        public static string color = "白色";        public  void Dye()        {            Console.WriteLine("着色{0}", white.color);        }    }}

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