建造者模式

来源：互联网发布：知乎周刊plus 编辑：程序博客网时间：2024/06/17 00:48

建造者模式：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。

当创建复杂对象的算法应该独立与该对象的组成部分以及它们的装配方式时适用的模式。

    class Program    {        static void Main(string[] args)        {            Director director = new Director();            Builder b1 = new ConcreteBuilder1();            Builder b2 = new ConcreteBuilder2();            director.Construct(b1);            Product p1 = b1.GetResult();            p1.Show();            director.Construct(b2);            Product p2 = b2.GetResult();            p2.Show();            Console.Read();        }    }    class Director    {        public void Construct(Builder builder)        {            builder.BuildPartA();            builder.BuildPartB();        }    }    abstract class Builder    {        public abstract void BuildPartA();        public abstract void BuildPartB();        public abstract Product GetResult();    }    class ConcreteBuilder1 : Builder    {        private Product product = new Product();        public override void BuildPartA()        {            product.Add("部件A");        }        public override void BuildPartB()        {            product.Add("部件B");        }        public override Product GetResult()        {            return product;        }    }    class ConcreteBuilder2 : Builder    {        private Product product = new Product();        public override void BuildPartA()        {            product.Add("部件X");        }        public override void BuildPartB()        {            product.Add("部件Y");        }        public override Product GetResult()        {            return product;        }    }    class Product    {        IList<string> parts = new List<string>();        public void Add(string part)        {            parts.Add(part);        }        public void Show()        {            Console.WriteLine("\n产品 创建 ----");            foreach (string part in parts)            {                Console.WriteLine(part);            }        }    }

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