在Java中如何隐藏复杂性_使用门面模式组织对象交互

public class InventoryService {
    public boolean checkStock(String productId) {
        System.out.println("检查 " + productId + " 的库存...");
        return true; // 简化模拟
    }
}

public class PaymentService {
    public boolean processPayment(double amount) {
        System.out.println("处理金额为 " + amount + " 的支付...");
        return true;
    }
}

public class ShippingService {
    public void arrangeShipping(String address) {
        System.out.println("已安排向 " + address + " 发货");
    }
}

public class OrderFacade {
    private InventoryService inventoryService = new InventoryService();
    private PaymentService paymentService = new PaymentService();
    private ShippingService shippingService = new ShippingService();

    public boolean placeOrder(String productId, double price, String address) {
        if (!inventoryService.checkStock(productId)) {
            System.out.println("库存不足");
            return false;
        }

        if (!paymentService.processPayment(price)) {
            System.out.println("支付失败");
            return false;
        }

        shippingService.arrangeShipping(address);
        System.out.println("订单创建成功");
        return true;
    }
}

public class Client {
    public static void main(String[] args) {
        OrderFacade orderFacade = new OrderFacade();
        orderFacade.placeOrder("P12345", 99.9, "北京市朝阳区");
    }
}

检查 P12345 的库存...
处理金额为 99.9 的支付...
已安排向 北京市朝阳区 发货
订单创建成功