种设计模式网上订餐系统的代码

以下是一个基于MVC设计模式的网上订餐系统的代码示例：

Model（模型）：

# models.py

class Menu:
    def __init__(self, dishes):
        self.dishes = dishes

    def get_dishes(self):
        return self.dishes

class Order:
    def __init__(self, customer_name, dish, quantity):
        self.customer_name = customer_name
        self.dish = dish
        self.quantity = quantity

    def get_customer_name(self):
        return self.customer_name

    def get_dish(self):
        return self.dish

    def get_quantity(self):
        return self.quantity

View（视图）：

# views.py

class MenuView:
    def show_menu(self, menu):
        print("Welcome to our restaurant! Here is the menu:")
        for dish in menu.get_dishes():
            print(f"{dish.name} - {dish.price}")

class OrderView:
    def get_order_details(self):
        customer_name = input("Please enter your name: ")
        dish_name = input("What would you like to order? ")
        quantity = int(input("How many would you like? "))
        return Order(customer_name, dish_name, quantity)

    def show_order_confirmation(self, order):
        print(f"Thank you, {order.get_customer_name()}! Your order of {order.get_quantity()} {order.get_dish()} has been placed.")

Controller（控制器）：

# controllers.py

class MenuController:
    def __init__(self, menu, menu_view):
        self.menu = menu
        self.menu_view = menu_view

    def show_menu(self):
        self.menu_view.show_menu(self.menu)

class OrderController:
    def __init__(self, order_view):
        self.order_view = order_view

    def take_order(self):
        order = self.order_view.get_order_details()
        self.order_view.show_order_confirmation(order)

Main（主程序）：

# main.py

from models import Menu, Order
from views import MenuView, OrderView
from controllers import MenuController, OrderController

# Create the menu
dishes = [
    Dish("Pizza", 10.99),
    Dish("Burger", 8.99),
    Dish("Pasta", 12.99)
]
menu = Menu(dishes)

# Initialize the views and controllers
menu_view = MenuView()
menu_controller = MenuController(menu, menu_view)

order_view = OrderView()
order_controller = OrderController(order_view)

# Show the menu and take the order
menu_controller.show_menu()
order_controller.take_order()

在这个示例中，我们使用了MVC设计模式，通过将视图、控制器和模型分离，使代码更加清晰和易于维护。模型表示数据和业务逻辑，视图显示数据并接收用户输入，控制器协调模型和视图之间的交互。