M_K3之装饰者模式

分析：抽象组件——具体组件——抽象装饰类_具体装饰类

相关UML图：

类总括：

相关代码：

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

namespace M_K3
{
    class Program
    {
        static void Main(string[] args)
        {
            char i;
            MobilePhone apple = new Apple();
            apple.SendMessage();
            apple.Call();

            Console.WriteLine("--------------------------------------");
            Console.WriteLine(" Please select new function.");
            Console.WriteLine(" Bluetooth----1.");
            Console.WriteLine(" GPS----2.");
            Console.WriteLine(" Camera----3.");
            Console.WriteLine(" End----0.");
            Console.WriteLine("---------------------------");
            Console.WriteLine("Input the choice:");

            while (true)
            {i = (char)Console.Read();
                if (i == ‘0‘)
                {
                    break;
                }
                if (i == ‘1‘)
                {
                    Bluetooth bluethooh = new Bluetooth();
                    bluethooh.Decorate(apple);
                    bluethooh.SendMessage();
                }
                if (i == ‘2‘)
                {
                    GPS gps = new GPS();
                    gps.Decorate(apple);
                    gps.SendMessage();
                }
                if (i == ‘3‘)
                {
                    Camera camera = new Camera();
                    camera.Decorate(apple);
                    camera.SendMessage();
                }
            }
        }
    }
}
abstract class MobilePhone
{
    public MobilePhone() { }
    public abstract void SendMessage();
    public abstract void Call();
    public abstract void Hello();
}
class Apple : MobilePhone
{
    public Apple() : base(){ }

    public override void SendMessage()
    {
        Console.WriteLine("Now,send message...Hello,I am Apple.");
    }

    public override void Call()
    {
        Console.WriteLine("Now,calling...Moxi Moxi,I‘am Apple.");
    }
    public override void Hello()
    {
        Console.WriteLine("Hello,there is Apple.");
    }
}
class Mi : MobilePhone
{
    public Mi() : base() { }

    public override void SendMessage()
    {
        Console.WriteLine("Now,send message...Hello,I am Mi.");
    }

    public override void Call()
    {
        Console.WriteLine("Now,calling...Moxi Moxi,I‘am Mi.");
    }
    public override void Hello()
    {
        Console.WriteLine("Hello,there is Mi.");
    }
}

abstract class Add : MobilePhone
{
    private MobilePhone _mobilephone;

    public Add() : base() { }

    public void Decorate(MobilePhone mobilephone)
    {
        _mobilephone = mobilephone;
    }

    public override void SendMessage()
    {
        _mobilephone.SendMessage();
    }

    public override void Call()
    {
        _mobilephone.Call();
    }
    public override void Hello()
    {
        _mobilephone.Hello();
    }
}

class Bluetooth : Add
{
    public Bluetooth() : base() { }

    public override void SendMessage()
    {
        base.Hello();
        Connect();
    }

    public void Connect()
    {
        Console.WriteLine("Initate Bluetooth of phone,and connect...");
    }
}

class GPS : Add
{
    public GPS() : base() { }

    public override void SendMessage()
    {
        base.Hello();
        Location();
    }

    public void Location()
    {
        Console.WriteLine("Now,open the GPS.Now,you are at...");
    }
}

class Camera : Add
{
    public Camera() : base() { }

    public override void SendMessage()
    {
        base.Hello();
        Cansee();
    }

    public void Cansee()
    {
        Console.WriteLine("Now,Camera open.Now,You can now open video calls...");
    }
}

运行结果：

优点：

1. 满足OCP原则；

2.可随意组合，改变建造者模式固定组合的情况，更具灵活性。