java基于控制台的图书购买系统

好的，我可以为您提供一个简单的Java控制台图书购买系统，您可以根据自己的需求进行修改和扩展。

首先，我们需要定义一个Book类，用于表示一本书的属性和行为：

public class Book {
    private String title;
    private String author;
    private double price;
    private int stock;

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

    public String getTitle() {
        return title;
    }

    public String getAuthor() {
        return author;
    }

    public double getPrice() {
        return price;
    }

    public int getStock() {
        return stock;
    }

    public void setStock(int stock) {
        this.stock = stock;
    }

    public String toString() {
        return String.format("%s - %s (%.2f元) 库存：%d本", title, author, price, stock);
    }
}

接下来，我们创建一个BookStore类，用于管理图书库存和购买流程：

import java.util.ArrayList;
import java.util.Scanner;

public class BookStore {
    private ArrayList<Book> books;

    public BookStore() {
        books = new ArrayList<Book>();
    }

    public void addBook(Book book) {
        books.add(book);
    }

    public void listBooks() {
        System.out.println("当前库存图书：");
        for (Book book : books) {
            System.out.println(book.toString());
        }
    }

    public void buyBook() {
        Scanner scanner = new Scanner(System.in);
        System.out.print("请输入要购买的书籍名称：");
        String title = scanner.nextLine();
        Book targetBook = null;
        for (Book book : books) {
            if (book.getTitle().equals(title)) {
                targetBook = book;
                break;
            }
        }
        if (targetBook == null) {
            System.out.println("未找到该书籍！");
            return;
        }
        System.out.print("请输入购买数量：");
        int num = scanner.nextInt();
        if (num > targetBook.getStock()) {
            System.out.println("库存不足！");
            return;
        }
        double totalPrice = targetBook.getPrice() * num;
        System.out.printf("购买成功，共花费%.2f元。", totalPrice);
        targetBook.setStock(targetBook.getStock() - num);
    }
}

最后，我们在Main函数中创建一个BookStore对象，添加几本图书，然后进入主循环，等待用户输入命令：

public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        BookStore store = new BookStore();
        store.addBook(new Book("Java编程思想", "Bruce Eckel", 99.0, 10));
        store.addBook(new Book("Effective Java", "Joshua Bloch", 89.0, 20));
        store.addBook(new Book("Head First 设计模式", "Eric Freeman", 69.0, 15));

        while (true) {
            System.out.println("\n请选择操作：");
            System.out.println("1. 查看库存");
            System.out.println("2. 购买书籍");
            System.out.println("3. 退出系统");
            System.out.print(">> ");
            int choice = scanner.nextInt();
            switch (choice) {
                case 1:
                    store.listBooks();
                    break;
                case 2:
                    store.buyBook();
                    break;
                case 3:
                    System.out.println("欢迎下次再来！");
                    return;
                default:
                    System.out.println("无效操作！");
                    break;
            }
        }
    }
}

这样，一个简单的Java控制台图书购买系统就完成了。您可以根据自己的需求进行修改和扩展，例如添加更多的图书属性、增加管理员登录功能等等。