Java实现图书的借阅功能，不包含数据库

实现图书的借阅功能可以采用面向对象编程的思想，定义一个Book类和一个Borrower类。

Book类表示图书，包含图书的基本信息：书名、作者、出版社、ISBN号、价格等。Book类还包含一个borrowed属性，表示该书是否已被借出。

Borrower类表示借书人，包含借书人的基本信息：姓名、学号、借书日期、应还日期等。Borrower类还包含一个books属性，表示该借书人借了哪些书。

下面是Java代码的示例：

class Book {
    private String title;
    private String author;
    private String publisher;
    private String isbn;
    private double price;
    private boolean borrowed;

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

    public String getTitle() {
        return title;
    }

    public String getAuthor() {
        return author;
    }

    public String getPublisher() {
        return publisher;
    }

    public String getIsbn() {
        return isbn;
    }

    public double getPrice() {
        return price;
    }

    public boolean isBorrowed() {
        return borrowed;
    }

    public void setBorrowed(boolean borrowed) {
        this.borrowed = borrowed;
    }
}

class Borrower {
    private String name;
    private String id;
    private String borrowDate;
    private String returnDate;
    private ArrayList<Book> books;

    public Borrower(String name, String id, String borrowDate, String returnDate) {
        this.name = name;
        this.id = id;
        this.borrowDate = borrowDate;
        this.returnDate = returnDate;
        this.books = new ArrayList<Book>();
    }

    public String getName() {
        return name;
    }

    public String getId() {
        return id;
    }

    public String getBorrowDate() {
        return borrowDate;
    }

    public String getReturnDate() {
        return returnDate;
    }

    public ArrayList<Book> getBooks() {
        return books;
    }

    public void borrowBook(Book book) {
        if (book.isBorrowed()) {
            System.out.println("Sorry, this book is already borrowed.");
        } else {
            book.setBorrowed(true);
            books.add(book);
            System.out.println("You have successfully borrowed " + book.getTitle());
        }
    }

    public void returnBook(Book book) {
        if (!book.isBorrowed()) {
            System.out.println("This book is not borrowed.");
        } else {
            book.setBorrowed(false);
            books.remove(book);
            System.out.println("You have successfully returned " + book.getTitle());
        }
    }
}

public class Library {
    public static void main(String[] args) {
        Book book1 = new Book("Java Programming", "John Doe", "O'Reilly Media", "978-0-596-52068-7", 39.99);
        Book book2 = new Book("Python Programming", "Jane Smith", "Wiley", "978-1-118-16770-4", 49.99);

        Borrower borrower1 = new Borrower("Tom", "123456", "2021-01-01", "2021-02-01");
        Borrower borrower2 = new Borrower("Lucy", "654321", "2021-01-02", "2021-02-02");

        borrower1.borrowBook(book1);
        borrower1.borrowBook(book2);
        borrower2.borrowBook(book1);

        borrower1.returnBook(book1);
        borrower2.returnBook(book1);
    }
}

在上面的示例中，我们创建了Book和Borrower两个类，并在Library类中进行了测试。首先创建了两本书和两个借书人，然后借书人1先借了书1和书2，借书人2再借书1。接下来借书人1还了书1，借书人2也还了书1。在借书和还书的过程中，我们对图书的borrowed属性进行了修改，以表示图书的借阅状态。