裝飾模式（Decorator）：動態地給一個物件新增一些額外的職責，就增加功能來說，裝飾模式比生成子類更為靈活。

package decorator;

/**
 * 裝飾模式(Decorator)
 * Person類
 */
public class Person {

    private String name;

    public Person() {}

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

    public void show() {
        System.out.println("裝扮的" + name);
    }

}
 

package decorator;

/**
 * 裝飾模式(Decorator)
 * 服飾類
 */
public class Finery extends Person {

    protected Person component;

    // 打扮
    public void decorate(Person component) {
        this.component = component;
    }

    @Override
    public void show() {
        if (component != null) {
            component.show();
        }
    }

}

class TShirts extends Finery {

    public void show() {
        System.out.print("大T恤  ");
        super.show();
    }

}

class BigTrouser extends Finery {

    public void show() {
        System.out.print("大褲頭  ");
        super.show();
    }

}

class Sneakers extends Finery {

    public void show() {
        System.out.print("破球鞋  ");
        super.show();
    }

}

class Suit extends Finery {

    public void show() {
        System.out.print("西裝  ");
        super.show();
    }

}

class Tie extends Finery {

    public void show() {
        System.out.print("領帶  ");
        super.show();
    }

}

class LeatherShoes extends Finery {

    public void show() {
        System.out.print("皮鞋  ");
        super.show();
    }

}
 

package decorator;

/**
 * 裝飾模式(Decorator)
 * 客戶端main方法
 */
public class Attire {

    public static void main(String[] args) {
        Person p0 = new Person("Kobe");
        System.out.println("第一種裝扮：");
        TShirts tShirts = new TShirts();
        BigTrouser bigTrouser = new BigTrouser();
        Sneakers sneakers = new Sneakers();
        tShirts.decorate(p0);
        bigTrouser.decorate(tShirts);
        sneakers.decorate(bigTrouser);
        sneakers.show();

        System.out.println("第二種裝扮：");
        Person p1 = new Person("Allen");
        Suit suit = new Suit();
        Tie tie = new Tie();
        LeatherShoes leatherShoes = new LeatherShoes();
        leatherShoes.decorate(p1);
        tie.decorate(leatherShoes);
        suit.decorate(tie);
        suit.show();

    }

}