Java设计模式——装饰模式

转载自：http://blog.csdn.net/xu__cg/article/details/53024490

抽象构件

public interface CarInterface {
    void move();
}

具体构建

public class Car implements CarInterface {
    public void move() {
        System.out.println("路上行驶");
    }
}

装饰角色

public class SuperCar implements CarInterface {
    protected CarInterface car;

    public SuperCar(CarInterface car) {
        this.car = car;
    }

    public void move() {
        car.move();
    }
}

具体装饰角色

/**
 * 飞行汽车
 */
public class FlyCar extends SuperCar {
    public FlyCar(CarInterface car) {
        super(car);
    }

    public void fly() {
        System.out.println("空中行驶汽车");
    }

    @Override
    public void move() {
        super.move();
        fly();
    }
}

/**
 * 水上汽车
 */
public class WaterCar extends SuperCar {
    public WaterCar(CarInterface car) {
        super(car);
    }

    public void swim() {
        System.out.println("水上行驶汽车");
    }

    @Override
    public void move() {
        super.move();
        swim();
    }
}

客户端

public class Client {
    public static void main(String[] args) {
        System.out.println("------普通汽车，正常行驶-----");
        Car car = new Car();
        car.move();

        System.out.println("------增加新功能,飞行------");
        FlyCar flyCar = new FlyCar(car);
        flyCar.move();

        System.out.println("------新增加功能，水上行驶-----");
        WaterCar waterCar = new WaterCar(car);
        waterCar.move();

        System.out.println("-----新增加两个功能，飞行与水上行驶-----");
        WaterCar waterCar2 = new WaterCar(flyCar);
        waterCar2.move();
    }
}