标签：images htm ids list 前言 例子 amp out uil
写给自己-贵在坚持。建造者模式不复杂，但是想个形象的例子好难。
定义：将一个复杂对象的构建与它的表示分离，使得同样的构建过程可以创建不同的表示。
建造者模式主要是应对复杂对象，在之前讲的滑板鞋的例子看上去不是很适合，因为它并不复杂。但是我们把一双鞋子拆分一下：鞋底、鞋带、鞋面 等等。原来它也并不简单，下面通过建造者模式来实现一下造鞋子的流程：
首先是建造者类：
/// <summary> /// 建造者基类 /// </summary> public abstract class Builder { /// <summary> /// 组装鞋底 /// </summary> public abstract void BuildTread(); /// <summary> /// 组装鞋面 /// </summary> public abstract void BuildVamp(); /// <summary> /// 穿鞋带 /// </summary> public abstract void BuildShoeLace(); /// <summary> /// 鞋子出厂 /// </summary> /// <returns></returns> public abstract Shoes OutShoes(); }
工厂里谁是建造者，当然是工人：
/// <summary> /// 操作员1 /// </summary> public class Operator1 : Builder { Shoes shoes = new Shoes(); public override void BuildShoeLace() { shoes.AddPart("鞋带1"); } public override void BuildTread() { shoes.AddPart("鞋底1"); } public override void BuildVamp() { shoes.AddPart("鞋面1"); } public override Shoes OutShoes() { return shoes; } } /// <summary> /// 操作员2 /// </summary> public class Operator2 : Builder { Shoes shoes = new Shoes(); public override void BuildShoeLace() { shoes.AddPart("鞋带2"); } public override void BuildTread() { shoes.AddPart("鞋底2"); } public override void BuildVamp() { shoes.AddPart("鞋面2"); } public override Shoes OutShoes() { return shoes; } }
还是产品-鞋子：
/// <summary> /// 鞋子 /// </summary> public class Shoes { public Shoes() { Parts = new List<string>(); } List<string> Parts { get; set; } public void AddPart(string part) { Parts.Add(part); } public void ShowParts() { for(int i =0,c = Parts.Count;i < c; i++) { Console.WriteLine("我的滑板鞋建造的顺序是_{0}:{1}",i,Parts[i]); } } }
假如是你工人的话，你会自觉的干活吗？(我不会,嘿嘿...所以需要老板来指挥)：
public class Boss { public Shoes BuidShoes(Builder builder) { builder.BuildTread(); builder.BuildVamp(); builder.BuildShoeLace(); return builder.OutShoes(); } }
下面看调用：
namespace DesignPattern { class Program { static void Main(string[] args) { Boss boss = new Boss(); Builder builder1 = new Operator1(); Shoes shoes1 = boss.BuidShoes(builder1); shoes1.ShowParts(); Console.WriteLine("-----------------华丽的分割线-----------------"); Builder builder2 = new Operator2(); Shoes shoes2 = boss.BuidShoes(builder2); shoes2.ShowParts(); Console.Read(); } } }
运行结果：
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标签：images htm ids list 前言 例子 amp out uil
原文地址：http://www.cnblogs.com/xinwang/p/6380564.html
