基于Java实现图书管理代码

以下是一个简单的基于Java实现图书管理的代码示例：

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

class Book {
    private String title;
    private String author;
    private String isbn;
    private int quantity;

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

    public String getTitle() {
        return title;
    }

    public String getAuthor() {
        return author;
    }

    public String getIsbn() {
        return isbn;
    }

    public int getQuantity() {
        return quantity;
    }

    public void setQuantity(int quantity) {
        this.quantity = quantity;
    }

    @Override
    public String toString() {
        return "Title: " + title + "\nAuthor: " + author + "\nISBN: " + isbn + "\nQuantity: " + quantity;
    }
}

class Library {
    private ArrayList<Book> books;

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

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

    public void removeBook(String isbn) {
        for (int i = 0; i < books.size(); i++) {
            if (books.get(i).getIsbn().equals(isbn)) {
                books.remove(i);
                return;
            }
        }
        System.out.println("Book not found.");
    }

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

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

    public void borrowBook(String isbn) {
        for (Book book : books) {
            if (book.getIsbn().equals(isbn)) {
                if (book.getQuantity() > 0) {
                    book.setQuantity(book.getQuantity() - 1);
                    System.out.println("Book borrowed successfully.");
                    return;
                } else {
                    System.out.println("Book not available.");
                    return;
                }
            }
        }
        System.out.println("Book not found.");
    }

    public void returnBook(String isbn) {
        for (Book book : books) {
            if (book.getIsbn().equals(isbn)) {
                book.setQuantity(book.getQuantity() + 1);
                System.out.println("Book returned successfully.");
                return;
            }
        }
        System.out.println("Book not found.");
    }
}

public class Main {
    public static void main(String[] args) {
        Library library = new Library();

        // Add some books
        library.addBook(new Book("The Great Gatsby", "F. Scott Fitzgerald", "9780743273565", 5));
        library.addBook(new Book("To Kill a Mockingbird", "Harper Lee", "9780446310789", 3));
        library.addBook(new Book("1984", "George Orwell", "9780451524935", 2));

        Scanner scanner = new Scanner(System.in);
        int choice;

        do {
            System.out.println("\n1. Add book");
            System.out.println("2. Remove book");
            System.out.println("3. Display books");
            System.out.println("4. Search book");
            System.out.println("5. Borrow book");
            System.out.println("6. Return book");
            System.out.println("0. Exit");
            System.out.print("Enter your choice: ");
            choice = scanner.nextInt();

            switch (choice) {
                case 1:
                    System.out.print("Enter title: ");
                    String title = scanner.next();
                    System.out.print("Enter author: ");
                    String author = scanner.next();
                    System.out.print("Enter ISBN: ");
                    String isbn = scanner.next();
                    System.out.print("Enter quantity: ");
                    int quantity = scanner.nextInt();
                    library.addBook(new Book(title, author, isbn, quantity));
                    System.out.println("Book added successfully.");
                    break;
                case 2:
                    System.out.print("Enter ISBN: ");
                    isbn = scanner.next();
                    library.removeBook(isbn);
                    break;
                case 3:
                    library.displayBooks();
                    break;
                case 4:
                    System.out.print("Enter keyword: ");
                    String keyword = scanner.next();
                    library.searchBook(keyword);
                    break;
                case 5:
                    System.out.print("Enter ISBN: ");
                    isbn = scanner.next();
                    library.borrowBook(isbn);
                    break;
                case 6:
                    System.out.print("Enter ISBN: ");
                    isbn = scanner.next();
                    library.returnBook(isbn);
                    break;
                case 0:
                    break;
                default:
                    System.out.println("Invalid choice.");
                    break;
            }
        } while (choice != 0);
    }
}

这个代码实现了一个简单的图书管理系统，包括添加书籍、删除书籍、显示所有书籍、搜索书籍、借出书籍和归还书籍等功能。你可以根据需要进行修改和扩展。