帮我用java写一份图书管理系统

好的，以下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 LibrarySystem {
    private ArrayList<Book> books;

    public LibrarySystem() {
        this.books = new ArrayList<>();
    }

    public void addBook(Book book) {
        books.add(book);
        System.out.println("添加成功！");
    }

    public void removeBook(int bookId) {
        for (Book book : books) {
            if (book.getId() == bookId) {
                books.remove(book);
                System.out.println("删除成功！");
                return;
            }
        }
        System.out.println("没有找到该书籍！");
    }

    public void searchBook(String keyword) {
        for (Book book : books) {
            if (book.getTitle().contains(keyword) || book.getAuthor().contains(keyword)) {
                System.out.println(book);
            }
        }
    }

    public void displayAllBooks() {
        for (Book book : books) {
            System.out.println(book);
        }
    }

    public static void main(String[] args) {
        LibrarySystem system = new LibrarySystem();
        Scanner scanner = new Scanner(System.in);

        while (true) {
            System.out.println("请输入操作编号：");
            System.out.println("1. 添加书籍");
            System.out.println("2. 删除书籍");
            System.out.println("3. 搜索书籍");
            System.out.println("4. 显示所有书籍");
            System.out.println("0. 退出程序");

            int option = scanner.nextInt();
            scanner.nextLine();

            switch (option) {
                case 0:
                    System.out.println("再见！");
                    System.exit(0);
                case 1:
                    System.out.println("请输入书籍信息（格式：书名,作者,出版社,价格）：");
                    String[] info = scanner.nextLine().split(",");
                    Book book = new Book(info[0], info[1], info[2], Double.parseDouble(info[3]));
                    system.addBook(book);
                    break;
                case 2:
                    System.out.println("请输入要删除的书籍编号：");
                    int id = scanner.nextInt();
                    scanner.nextLine();
                    system.removeBook(id);
                    break;
                case 3:
                    System.out.println("请输入搜索关键词：");
                    String keyword = scanner.nextLine();
                    system.searchBook(keyword);
                    break;
                case 4:
                    system.displayAllBooks();
                    break;
                default:
                    System.out.println("无效操作！");
            }
        }
    }
}

class Book {
    private static int count = 1;

    private int id;
    private String title;
    private String author;
    private String publisher;
    private double price;

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

    public int getId() {
        return id;
    }

    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 "编号：" + id + "，书名：" + title + "，作者：" + author + "，出版社：" + publisher + "，价格：" + price;
    }
}

这个图书管理系统包括以下功能：

1. 添加书籍
2. 删除书籍
3. 搜索书籍
4. 显示所有书籍

你可以根据自己的需求进行修改和扩展。