装饰模式（Dcorator）

装饰模式（Dcorator），动态地给一个对象添加一些额外的职责，就增加功能来说，装饰模式比生成子类更为灵活。

主函数

public class main {
    public static void main(String[] args) {
        Person xc = new Person("小菜");

        System.out.println("\n第一种装扮");

        Sneakers pqx = new Sneakers();
        BigTrouser kk = new BigTrouser();
        TShirts dtx = new TShirts();

        pqx.Decorate(xc);
        kk.Decorate(pqx);
        dtx.Decorate(kk);
        dtx.Show();

        System.out.println("\n第二种装扮");

        LeatherShoes px = new LeatherShoes();
        Tie ld = new Tie();
        Suit xz = new Suit();

        px.Decorate(xc);
        ld.Decorate(px);
        xz.Decorate(ld);
        xz.Show();
    }
}

装饰器父类(顶级类)

public class Person {
    public Person() {

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

    public void Show() {
        System.out.println("装扮的{"+name+"}");
    }
}

子类

public class Finery extends Person {
    protected Person component;

    public void Decorate(Person component) {
        this.component = component;
    }

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

孙子类

public class Sneakers extends Finery {
    public void Show() {
        System.out.print("破球鞋 ");
        super.Show();
    }
}

public class BigTrouser extends Finery {
    public void Show() {
        System.out.print("垮裤 ");
        super.Show();
    }
}

public class Suit extends Finery {
    public void Show() {
        System.out.print("西装 ");
        super.Show();
    }
}

public class Tie extends Finery {
    public void Show() {
        System.out.print("领带 ");
        super.Show();
    }
}

public class TShirts extends Finery {
    public void Show() {
        System.out.print("大T恤 ");
        super.Show();
    }
}

public class LeatherShoes extends Finery {
    public void Show() {
        System.out.print("皮鞋 ");
        super.Show();
    }
}