在Java中如何开发小型图书管理系统

public class Book {
    private String isbn;
    private String title;
    private String author;
    private int year;

    public Book(String isbn, String title, String author, int year) {
        this.isbn = isbn;
        this.title = title;
        this.author = author;
        this.year = year;
    }

    // Getter 方法
    public String getIsbn() { return isbn; }
    public String getTitle() { return title; }
    public String getAuthor() { return author; }
    public int getYear() { return year; }

    @Override
    public String toString() {
        return "ISBN: " + isbn + ", 书名: " + title + ", 作者: " + author + ", 年份: " + year;
    }
}

impor
t java.util.ArrayList;
import java.util.List;
import java.util.Scanner;

public class BookManager {
    private List books;
    private Scanner scanner;

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

    public void addBook() {
        System.out.print("输入ISBN: ");
        String isbn = scanner.nextLine();
        System.out.print("输入书名: ");
        String title = scanner.nextLine();
        System.out.print("输入作者: ");
        String author = scanner.nextLine();
        System.out.print("输入出版年份: ");
        int year = Integer.parseInt(scanner.nextLine());

        Book book = new Book(isbn, title, author, year);
        books.add(book);
        System.out.println("图书添加成功！");
    }

    public void viewAllBooks() {
        if (books.isEmpty()) {
            System.out.println("暂无图书记录。");
        } else {
            for (Book book : books) {
                System.out.println(book);
            }
        }
    }

    public void searchBooks() {
        System.out.print("请输入要搜索的关键词（书名或作者）: ");
        String keyword = scanner.nextLine().toLowerCase();

        List results = new ArrayList<>();
        for (Book book : books) {
            if (book.getTitle().toLowerCase().contains(keyword) ||
                book.getAuthor().toLowerCase().contains(keyword)) {
                results.add(book);
            }
        }

        if (results.isEmpty()) {
            System.out.println("未找到相关图书。");
        } else {
            System.out.println("搜索结果:");
            for (Book book : results) {
                System.out.println(book);
            }
        }
    }

    public void deleteBook() {
        System.out.print("请输入要删除的图书ISBN: ");
        String isbn = scanner.nextLine();

        boolean removed = books.removeIf(book -> book.getIsbn().equals(isbn));
        if (removed) {
            System.out.println("图书删除成功！");
        } else {
            System.out.println("未找到该ISBN的图书。");
        }
    }
}

public class Main {
    public static void main(String[] args) {
        BookManager manager = new BookManager();
        Scanner scanner = new Scanner(System.in);
        int choice;

        while (true) {
            System.out.println("\n=== 小型图书管理系统 ===");
            System.out.println("1. 添加图书");
            System.out.println("2. 查看所有图书");
            System.out.println("3. 搜索图书");
            System.out.println("4. 删除图书");
            System.out.println("5. 退出");
            System.out.print("请选择操作: ");

            try {
                choice = Integer.parseInt(scanner.nextLine());
            } catch (NumberFormatException e) {
                System.out.println("请输入有效数字！");
                continue;
            }

            switch (choice) {
                case 1 -> manager.addBook();
                case 2 -> manager.viewAllBooks();
                case 3 -> manager.searchBooks();
                case 4 -> manager.deleteBook();
                case 5 -> {
                    System.out.println("感谢使用，再见！");
                    return;
                }
                default -> System.out.println("无效选择，请重试。");
            }
        }
    }
}