『设计模式』小伙你的穿搭很潮！--装饰者模式

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Decorator1->Decorator2->Decorator3->Concrete Comp

 
 

 
 

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//抽象构件(Component)角色
public abstract class Component {
    public abstract void operate();
    
//具体构件(ConcreteComponent)角色,被包装对象
public class ConcreteComponent extends Component {
    @Override
    public void operate() {
        System.out.println("ConcreteComponent 原始对象操作");
    }
}
// 装饰(Decorator)角色：
public abstract class Decorator extends Component {
    private Component component;

    /**
     * 构造函数传递要装饰的对象
     * @param component 被装饰的对象
     */
    public Decorator(Component component) {
        this.component = component;
    }

    @Override
    public void operate() {
        //调用被装饰者的方法
        this.component.operate();
    }
}
 
public class ConcreteDecoratorA extends Decorator {

    public ConcreteDecoratorA(Component component) {
        super(component);
    }

    @Override
    public void operate() {
        super.operate();
        //调用自己的方法
        this.operateAMethod();
    }

    private void operateAMethod() {
        System.out.println("ConcreteDecoratorA添加的修饰方法");
    }
}
 
public class ConcreteDecoratorB extends Decorator {

    public ConcreteDecoratorB(Component component) {
        super(component);
    }

    @Override
    public void operate() {
        //调用自己的方法
        this.operateBMethod();
        super.operate();
    }

    private void operateBMethod() {
        System.out.println("ConcreteDecoratorB添加的修饰方法");
    }
}
 
public class Client {

    public static void main(String[] args) {
        //创建原始对象
        Component component = new ConcreteComponent();
        //第一次装饰
        component = new ConcreteDecoratorA(component);
        //第二次装饰
        component = new ConcreteDecoratorB(component);
        //两次装饰后的操作
        component.operate();
    }
}

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using System;
namespace Wear
{
    abstract class Component
    {
        public abstract void Show();
    }
    class Person: Component
    {
        private String name;
        public Person() { }
        public Person(String name)
        {
            this.name = name;
        }
        public override void Show()
        {
            Console.WriteLine("装饰的{0}", name);
        }
    }
    class Finery : Component
    {
        protected Component component;
        public Finery(Component component)
        {
            this.component = component;
        }
        public override void Show()
        {
            if(component!=null)
            {
                component.Show();
            }
        }
    }
    class Tshirt:Finery
    {
        public Tshirt(Component component) : base(component) { }
        public override void Show()
        {
            Console.Write("大T恤 ");
            base.Show();
        }
    }
    class BigTrouser : Finery
    {
        public BigTrouser(Component component) : base(component) { }
        public override void Show()
        {
            Console.Write("垮裤 ");
            base.Show();
        }
    }
    class Sneakers : Finery
    {
        public Sneakers(Component component) : base(component) { }
        public override void Show()
        {
            Console.Write("破球鞋 ");
            base.Show();
        }
    }
    class Suit : Finery
    {
        public Suit(Component component) : base(component) { }
        public override void Show()
        {
            Console.Write("西装 ");
            base.Show();
        }
    }
    class Tie : Finery
    {
        public Tie(Component component) : base(component) { }
        public override void Show()
        {
            Console.Write("领带 ");
            base.Show();
        }
    }
    class LeatherShoes : Finery
    {
        public LeatherShoes(Component component) : base(component) { }
        public override void Show()
        {
            Console.Write("皮鞋 ");
            base.Show();
        }
    }
    class Program
    {
        static void Main(string[] args)
        {
            Person xc = new Person("小菜");
            Console.WriteLine("第一种装扮");
            Finery dtx = new Tshirt(new BigTrouser(new Sneakers(xc)));
            dtx.Show();
            Console.WriteLine("第二种装扮");
            Finery sut = new Suit(new Tie(new LeatherShoes(xc)));
            sut.Show();
        }
    }
}