用Java写一个图书管理系统

好的，下面是一个简单的图书管理系统的 Java 代码示例：

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

public class BookManagementSystem {
    private ArrayList<Book> bookList;
    private Scanner scanner;

    public BookManagementSystem() {
        bookList = new ArrayList<>();
        scanner = new Scanner(System.in);
    }

    public void run() {
        while (true) {
            System.out.println("请选择操作：1.添加图书 2.删除图书 3.查找图书 4.显示所有图书 5.退出");
            int choice = scanner.nextInt();
            switch (choice) {
                case 1:
                    addBook();
                    break;
                case 2:
                    removeBook();
                    break;
                case 3:
                    searchBook();
                    break;
                case 4:
                    displayBooks();
                    break;
                case 5:
                    return;
                default:
                    System.out.println("无效的操作，请重新选择！");
            }
        }
    }

    private void addBook() {
        System.out.println("请输入图书信息：");
        System.out.print("书名：");
        String title = scanner.next();
        System.out.print("作者：");
        String author = scanner.next();
        System.out.print("出版社：");
        String publisher = scanner.next();
        System.out.print("价格：");
        double price = scanner.nextDouble();
        Book book = new Book(title, author, publisher, price);
        bookList.add(book);
        System.out.println("添加成功！");
    }

    private void removeBook() {
        System.out.print("请输入要删除的图书的书名：");
        String title = scanner.next();
        for (int i = 0; i < bookList.size(); i++) {
            Book book = bookList.get(i);
            if (book.getTitle().equals(title)) {
                bookList.remove(i);
                System.out.println("删除成功！");
                return;
            }
        }
        System.out.println("没有找到要删除的图书！");
    }

    private void searchBook() {
        System.out.print("请输入要查找的图书的书名：");
        String title = scanner.next();
        for (int i = 0; i < bookList.size(); i++) {
            Book book = bookList.get(i);
            if (book.getTitle().equals(title)) {
                System.out.println("找到了如下图书：");
                System.out.println(book);
                return;
            }
        }
        System.out.println("没有找到要查找的图书！");
    }

    private void displayBooks() {
        if (bookList.size() == 0) {
            System.out.println("当前没有图书！");
            return;
        }
        System.out.println("当前所有图书如下：");
        for (Book book : bookList) {
            System.out.println(book);
        }
    }

    public static void main(String[] args) {
        BookManagementSystem system = new BookManagementSystem();
        system.run();
    }
}

class Book {
    private String title;
    private String author;
    private String publisher;
    private double price;

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

    public String getTitle() {
        return title;
    }

    public String getAuthor() {
        return author;
    }

    public String getPublisher() {
        return publisher;
    }

    public double getPrice() {
        return price;
    }

    @Override
    public String toString() {
        return "书名：" + title + " 作者：" + author + " 出版社：" + publisher + " 价格：" + price;
    }
}

这个图书管理系统实现了添加图书、删除图书、查找图书、显示所有图书等功能。运行程序后，用户可以根据菜单选择相应的操作，进行图书管理。