23种设计模式之建造者模式（Builder）

23种设计模式之建造者模式（Builder）

建造者模式强调将一个复杂对象的创建与它的表示分离，使得同样的构建过程可以创建不同的表示。建造者模式是一步一步地创建一个复杂的对象，它允许用户只通过制定复杂对象的类型和内容就可以构建它们，用户不需要知道内部的具体构建细节。建造者模式属于对象创建型模式。

public abstract class Builder

{

public abstract void MakeTitle(string title);

public abstract void MakeString(string str);

public abstract void MakeItems(string[] items);

public abstract Object GetResult();

}

public class Director

private Builder builder;

public Director(Builder builder)

this.builder = builder;

public Object Construct()

builder.MakeTitle("Greeting");

builder.MakeString("从早上到白天结束");

builder.MakeItems(new string[] { "早安", "午安" });

builder.MakeString("到了晚上");

builder.MakeItems(new string[] { "晚安", "好梦" });

return builder.GetResult();

public class TextBuilder : Builder

private StringBuilder sb = new StringBuilder();

public override void MakeTitle(string title)

sb.Append("【" + title + "】/n/n");

public override void MakeString(string str)

sb.Append(str + "/n/n");

public override void MakeItems(string[] items)

for (int i = 0; i < items.Length; i++)

sb.Append(items[i] + "/n");

sb.Append("/n");

public override object GetResult()

return sb.ToString();

class Program

static void Main(string[] args)

//生成器模式

Builder.Director director = new Builder.Director(new Builder.TextBuilder());

string result = director.Construct() as string;

Console.WriteLine(result);