装饰模式

最新推荐文章于 2025-06-23 14:33:19 发布

原创最新推荐文章于 2025-06-23 14:33:19 发布 · 93 阅读

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CC 4.0 BY-SA版权

本文通过一个实例详细解析了装饰模式的概念及应用。装饰模式允许在不修改原有类的情况下，动态地给对象添加新的职责，增强其功能。通过继承和组合，可以灵活地为对象添加多个装饰，实现功能的叠加。

装饰模式

动态的给对象添加职责

Decorator.PNG

用例：
给一个人添加装饰

class Program
    {
        static void Main(string[] args)
        {
            Trainee trainee = new Trainee("cxk");
            Finery finery0 = new Student();
            finery0.SetPerson(trainee);
            Finery finery1 = new BasketBall();
            finery1.SetPerson(finery0);
            finery1.Show();
        }
    }
    abstract class Person
    {
        public abstract void Show();
    }
    class Trainee : Person
    {
        protected string name;
        public Trainee(string name)
        {
            this.name = name;
        }
        public override void Show()
        {
            Console.WriteLine("我是"+name+"\n");
        }
    }
    abstract class Finery : Person
    {
        protected Person person;
        public void SetPerson(Person person)
        {
            this.person = person;
        }
        public override void Show()
        {
            if(person != null)
            {
                person.Show();
            }
        }
    }
    class Student : Finery
    {
        public override void Show()
        {
            base.Show();
            Console.WriteLine("I am student"+"\n");
        }
    }
    class BasketBall : Finery
    {
        public override void Show()
        {
            base.Show();
            Console.WriteLine("I am BasketBaller"+"\n");
        }
    }