java设计模式-装饰者模式

/**
 * 被装饰者-食物类
 */
public class Food {
    private String foodName;
    public Food() {
    }

    public Food(String foodName) {
        this.foodName = foodName;
    }

    public String make() {
        return foodName;
    }
}

/**
 * 装饰者-面包类
 */
public class Bread extends Food {
    private Food food;
    public Bread(Food food) {
        this.food = food;
    }

    public String make() {
        return food.make() + "+面包";
    }
}

/**
 * 装饰者-奶油类
 */
public class Cream extends Food {
    private Food food;
    public Cream(Food food) {
        this.food = food;
    }

    public String make() {
        return food.make() + "+奶油";
    }
}

/**
 * 装饰者-蔬菜类
 */
public class Vegetable extends Food {
    private Food food;
    public Vegetable(Food food) {
        this.food = food;
    }

    public String make() {
        return food.make() + "+蔬菜";
    }
}

public class DecoratorDemo {
    public static void main(String[] args) {
        Food food = new Bread(new Vegetable(new Cream(new Food("香肠"))));
        System.out.println(food.make());
    }

}

香肠+奶油+蔬菜+面包
Process finished with exit code 0