装饰模式

从衣服装饰看起，就是把一个人不断包装。

第一个类：抽象类组成类

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApp3
{
    abstract class Component
    {
        public abstract void show();
    }
}

定义一个抽象展现函数。

第二个类：装饰类（继承抽象组成类、成员函数是其父类组成类）

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApp3
{
    class Finery:Component
    {
        protected Component com;

        public Finery(Component com)
        {
            this.com = com;
        }

        public override void show()
        {
            if(com!=null)
            {
                com.show();
            }
        }
    }
}

第三个类：人物类（成员是其名字、成员函数是展现函数、继承装饰类）

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApp3
{
    class Person : Component
    {
        private string name;

        public Person(string name)
        {
            this.name = name;
        }

        public Person()
        {
        }

        public override void show()
        {
            Console.WriteLine (name);
        }
    }
}

第四、五、六都是衣服类（继承装饰类）

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApp3
{
    class Kt:Finery
    {
        public Kt(Component com) : base(com) { }

        public override void show()
        {
            Console.WriteLine("穿了裤子");
            base.show();
        }

    }
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApp3
{
    class Shoe:Finery 
    {
        public Shoe(Component com) : base(com) { }

        public override void show()
        {
            Console.WriteLine("穿了鞋子");
            base.show();
        }
    }
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApp3
{
    class Ts : Finery
    {
        public Ts(Component com) : base(com) { }//初始化父类
        public override void show()
        {
            Console.WriteLine("穿了T-shirt");
            base.show();
        }
    }
}




using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApp3
{
    class Dx:Finery
    {
        public Dx(Component com) : base(com) { }//初始化父类

        public override void show()
        {
            Console.WriteLine("穿了短袖");
            base.show();
        }
    }
}

然后是测试类

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApp3
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine("第一种方式");
            Component Mrs = new Person("小王");
            Component Kt = new Kt(Mrs);
            Component Ts = new Ts(Kt);
            Component Shoe = new Shoe(Ts);
            Shoe.show();
            Console.WriteLine("-------------------");
            Console.WriteLine("第二种方式");
            Component Dx = new Dx(new Kt(new Shoe(new Person("小李"))));
            Dx.show();
            //递归调用
        }
    }
}

注意多体会写法。

UML