用Java 语言设计一个无图形界面的图书管理系统

好的，以下是用Java语言设计的无图形界面的图书管理系统：

1. 定义一个Book类，包含书名、作者、出版社、出版日期、ISBN、价格等属性，并提供相应的get/set方法。

2. 定义一个BookManager类，包含添加书籍、删除书籍、修改书籍信息、查询书籍、显示所有书籍、保存数据、加载数据等方法。具体实现如下：

import java.io.*;
import java.util.*;

public class BookManager {
    private List<Book> books;
    private File file;

    public BookManager() {
        books = new ArrayList<>();
        file = new File("books.txt");
        load();
    }

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

    public void deleteBook(String isbn) {
        Iterator<Book> iterator = books.iterator();
        while (iterator.hasNext()) {
            Book book = iterator.next();
            if (book.getIsbn().equals(isbn)) {
                iterator.remove();
                break;
            }
        }
    }

    public void updateBook(String isbn, Book book) {
        for (int i = 0; i < books.size(); i++) {
            if (books.get(i).getIsbn().equals(isbn)) {
                books.set(i, book);
                break;
            }
        }
    }

    public Book searchBook(String keyword) {
        for (Book book : books) {
            if (book.getTitle().contains(keyword) || book.getAuthor().contains(keyword) || book.getPublisher().contains(keyword)) {
                return book;
            }
        }
        return null;
    }

    public List<Book> getAllBooks() {
        return books;
    }

    public void save() {
        try (PrintWriter writer = new PrintWriter(new FileWriter(file))) {
            for (Book book : books) {
                writer.println(book.getTitle() + "," + book.getAuthor() + "," + book.getPublisher() + "," + book.getPublicationDate() + "," + book.getIsbn() + "," + book.getPrice());
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    public void load() {
        if (file.exists()) {
            try (Scanner scanner = new Scanner(new FileInputStream(file))) {
                while (scanner.hasNextLine()) {
                    String line = scanner.nextLine();
                    String[] fields = line.split(",");
                    String title = fields[0];
                    String author = fields[1];
                    String publisher = fields[2];
                    String publicationDate = fields[3];
                    String isbn = fields[4];
                    double price = Double.parseDouble(fields[5]);
                    Book book = new Book(title, author, publisher, publicationDate, isbn, price);
                    books.add(book);
                }
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }
}

3. 定义一个BookTest类，用于测试BookManager类的各个方法。具体实现如下：

public class BookTest {
    public static void main(String[] args) {
        BookManager manager = new BookManager();

        Book book1 = new Book("Java从入门到精通", "张三", "清华大学出版社", "2021-01-01", "978-7-302-12345-6", 59.9);
        Book book2 = new Book("Java编程思想", "李四", "机械工业出版社", "2020-03-01", "978-7-121-18888-8", 89.9);
        Book book3 = new Book("Java核心技术", "王五", "人民邮电出版社", "2020-07-01", "978-7-115-48282-2", 69.9);
        manager.addBook(book1);
        manager.addBook(book2);
        manager.addBook(book3);

        System.out.println("添加书籍后的所有书籍：");
        List<Book> books = manager.getAllBooks();
        for (Book book : books) {
            System.out.println(book);
        }

        System.out.println("删除一本书籍后的所有书籍：");
        manager.deleteBook("978-7-302-12345-6");
        books = manager.getAllBooks();
        for (Book book : books) {
            System.out.println(book);
        }

        System.out.println("修改一本书籍信息后的所有书籍：");
        Book newBook = new Book("Java从入门到精通（第2版）", "张三", "清华大学出版社", "2021-07-01", "978-7-302-12345-6", 69.9);
        manager.updateBook("978-7-302-12345-6", newBook);
        books = manager.getAllBooks();
        for (Book book : books) {
            System.out.println(book);
        }

        System.out.println("查询一本书籍：");
        Book searchedBook = manager.searchBook("Java编程思想");
        System.out.println(searchedBook);

        manager.save();
    }
}

以上就是用Java语言设计的无图形界面的图书管理系统。