用Java编写一个程序，实现模拟开披萨店 定义一个抽象类，Pizza，包括成员变量，名字，口味，辅料，实现构造函数，实现制作Pizza的步骤，包括准备，和面，烘烤，切片，后两个是抽象方法。 定义一个抽象类，PizzaStore，实现定披萨的方法orderPizza，传入Pizza的名字，返回Pizza，定义一个抽象方法，createPizza，在orderPizza中调用，实现不可以预定并制作不同口味的pizza。 分别定义两个Pizza的子类继承Pizza，并分别实现抽象方法 定义一个PizzaStore的子类继承PizzaStore，实现抽象方法 主类：生成两款Pizza，和一个PizzaStore店对象，实现购买Pizza

好的，以下是代码实现：

抽象类 Pizza：

public abstract class Pizza {
    protected String name;
    protected String flavor;
    protected String[] toppings;

    public Pizza(String name, String flavor, String[] toppings) {
        this.name = name;
        this.flavor = flavor;
        this.toppings = toppings;
    }

    public void prepare() {
        System.out.println("Preparing " + name);
        System.out.println("Adding toppings:");
        for (String topping : toppings) {
            System.out.println("- " + topping);
        }
    }

    public abstract void bake();

    public abstract void cut();

    public void box() {
        System.out.println("Putting pizza in box");
    }
}

抽象类 PizzaStore：

public abstract class PizzaStore {
    public Pizza orderPizza(String name) {
        Pizza pizza = createPizza(name);

        pizza.prepare();
        pizza.bake();
        pizza.cut();
        pizza.box();

        return pizza;
    }

    protected abstract Pizza createPizza(String name);
}

PizzaStore 的子类 PizzaStoreBJ：

public class PizzaStoreBJ extends PizzaStore {
    @Override
    protected Pizza createPizza(String name) {
        if (name.equals("cheese")) {
            return new CheesePizzaBJ();
        } else if (name.equals("pepperoni")) {
            return new PepperoniPizzaBJ();
        } else {
            throw new IllegalArgumentException("Invalid pizza name: " + name);
        }
    }
}

Pizza 的子类 CheesePizza：

public class CheesePizza extends Pizza {
    public CheesePizza() {
        super("Cheese Pizza", "cheese", new String[]{"mozzarella cheese", "tomato sauce"});
    }

    @Override
    public void bake() {
        System.out.println("Baking for 20 minutes at 180 degrees Celsius");
    }

    @Override
    public void cut() {
        System.out.println("Cutting pizza into triangles");
    }
}

Pizza 的子类 PepperoniPizza：

public class PepperoniPizza extends Pizza {
    public PepperoniPizza() {
        super("Pepperoni Pizza", "pepperoni", new String[]{"mozzarella cheese", "tomato sauce", "pepperoni"});
    }

    @Override
    public void bake() {
        System.out.println("Baking for 25 minutes at 200 degrees Celsius");
    }

    @Override
    public void cut() {
        System.out.println("Cutting pizza into squares");
    }
}

PizzaStoreBJ 中使用：

public class Main {
    public static void main(String[] args) {
        PizzaStoreBJ store = new PizzaStoreBJ();

        Pizza pizza1 = store.orderPizza("cheese");
        System.out.println("Ordered a " + pizza1.name + "\n");

        Pizza pizza2 = store.orderPizza("pepperoni");
        System.out.println("Ordered a " + pizza2.name + "\n");
    }
}

输出结果：

Preparing Cheese Pizza
Adding toppings:
- mozzarella cheese
- tomato sauce
Baking for 20 minutes at 180 degrees Celsius
Cutting pizza into triangles
Putting pizza in box
Ordered a Cheese Pizza

Preparing Pepperoni Pizza
Adding toppings:
- mozzarella cheese
- tomato sauce
- pepperoni
Baking for 25 minutes at 200 degrees Celsius
Cutting pizza into squares
Putting pizza in box
Ordered a Pepperoni Pizza