设计模式：抽象工厂

Pizza

public abstract class Pizza {
 
    // 披萨名称
    private String pizzaName;
 
    /**
     * 披萨准备工作
     */
    public abstract void prepare();
 
    public void bake() {
        System.out.println(pizzaName + "正在烘烤");
    }
 
    public void cut() {
        System.out.println(pizzaName + "正在剪切");
    }
 
    public void pack() {
        System.out.println(pizzaName + "正在打包");
    }
 
    public void setPizzaName(String pizzaName) {
        this.pizzaName = pizzaName;
    }
 
}

BJCheesePizza

public class BJCheesePizza extends Pizza{
    @Override
    public void prepare() {
        setPizzaName("北京奶酪披萨");
        System.out.println("北京奶酪披萨正在准备中");
    }
}

BJPepperPizza

public class BJPepperPizza extends Pizza {
    @Override
    public void prepare() {
        setPizzaName("北京胡椒披萨");
        System.out.println("北京胡椒披萨正在准备中");
    }
}

LDCheesePizza

public class LDCheesePizza extends Pizza {
    @Override
    public void prepare() {
        setPizzaName("伦敦奶酪披萨");
        System.out.println("伦敦奶酪披萨正在准备中");
    }
}

LDPepperPizza

public class LDPepperPizza extends Pizza{
    @Override
    public void prepare() {
        setPizzaName("伦敦胡椒披萨");
        System.out.println("伦敦胡椒披萨正在准备中");
    }
}

AbsFactory

public interface AbsFactory {
 
    /**
     * 创建pizza
     * @param pizzaType 披萨类型
     * @return 需要创建的pizza
     */
    Pizza createPizza(String pizzaType);
 
}

BJFactory

public class BJFactory implements AbsFactory{
    @Override
    public Pizza createPizza(String pizzaType) {
        if ("cheese".equals(pizzaType)) {
            return new BJCheesePizza();
        } else if ("pepper".equals(pizzaType)) {
            return new BJPepperPizza();
        }
        return null;
    }
}

LDFactory

public class LDFactory implements AbsFactory {
    @Override
    public Pizza createPizza(String pizzaType) {
        if ("cheese".equals(pizzaType)) {
            return new LDCheesePizza();
        } else if ("pepper".equals(pizzaType)) {
            return new LDCheesePizza();
        }
        return null;
    }
}

OrderPizza

public class OrderPizza {
 
    public OrderPizza(AbsFactory factory) {
        handlerPizza(factory);
    }
 
    private void handlerPizza(AbsFactory factory) {
        do {
            String pizzaType = getPizzaType();
            Pizza pizza = factory.createPizza(pizzaType);
            if (Objects.nonNull(pizza)) {
                pizza.prepare();
                pizza.bake();
                pizza.cut();
                pizza.pack();
            } else {
                System.out.println("输入的pizza目前不支持制作,请等待");
                break;
            }
        } while (true);
    }
 
    /**
     * 获取要制作的pizza
     *
     * @return pizza种类
     */
    private String getPizzaType() {
        BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
        try {
            System.out.print("请输入要订购的披萨：");
            String pizzaType = reader.readLine();
            System.out.println("要订阅的pizza种类：" + pizzaType);
            return pizzaType;
        } catch (IOException e) {
            e.printStackTrace();
            return "";
        }
    }
}

PizzaStore

public class PizzaStore {
    public static void main(String[] args) {
//        new OrderPizza(new LDFactory());
        new OrderPizza(new BJFactory());
    }
}