基于控制台的购书系统java代码

基于控制台的购书系统通常是一个简单的命令行交互程序，用于模拟用户购买书籍的过程。以下是使用Java编写的一个简化的示例：

import java.util.Scanner;

class Book {
    String title;
    double price;

    public Book(String title, double price) {
        this.title = title;
        this.price = price;
    }

    public void displayBook() {
        System.out.println("Title: " + title);
        System.out.println("Price: " + price);
    }
}

public class ShoppingCart {
    private double totalPrice;
    private Book currentBook;

    public void addToCart(Book book) {
        if (currentBook == null) {
            currentBook = book;
        } else {
            currentBook = new Book(currentBook.getTitle(), currentBook.getPrice());
        }
        totalPrice += book.getPrice();
        System.out.println("Added " + book.title + " to cart. Total Price: " + totalPrice);
    }

    public void checkout() {
        if (currentBook != null) {
            System.out.println("Purchased: " + currentBook.title);
            System.out.println("Total Price: " + totalPrice);
            currentBook = null; // 清空购物车
            totalPrice = 0;
        } else {
            System.out.println("No books in the cart.");
        }
    }
}

public class ConsoleBookShop {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        ShoppingCart cart = new ShoppingCart();

        while (true) {
            System.out.println("\nChoose an action: 1. Add a book 2. Checkout 3. Exit");
            int choice = scanner.nextInt();

            switch (choice) {
                case 1:
                    System.out.print("Enter book title: ");
                    String title = scanner.next();
                    System.out.print("Enter book price: ");
                    double price = scanner.nextDouble();
                    Book book = new Book(title, price);
                    cart.addToCart(book);
                    break;
                case 2:
                    cart.checkout();
                    break;
                case 3:
                    System.out.println("Goodbye!");
                    scanner.close();
                    return;
                default:
                    System.out.println("Invalid choice. Please try again.");
            }
        }
    }
}

在这个例子中，`Book`类代表书籍，`ShoppingCart`类管理购物车和总价。`ConsoleBookShop`是主入口，它通过`Scanner`接收用户的输入，并根据用户的指令操作购物车。