java代码实现图书管理_Java图书管理系统（用Java常用集合实现）(示例代码)

好的，这是一个简单的 Java 图书管理系统示例代码，使用 Java 常用集合实现：

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

public class BookManagementSystem {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        HashMap<String, ArrayList<Book>> bookMap = new HashMap<>();
        boolean exit = false;

        while (!exit) {
            System.out.println("请选择操作：");
            System.out.println("1. 添加图书");
            System.out.println("2. 借出图书");
            System.out.println("3. 归还图书");
            System.out.println("4. 查看图书");
            System.out.println("5. 退出");

            int choice = scanner.nextInt();
            switch (choice) {
                case 1:
                    addBook(scanner, bookMap);
                    break;
                case 2:
                    lendBook(scanner, bookMap);
                    break;
                case 3:
                    returnBook(scanner, bookMap);
                    break;
                case 4:
                    showBooks(bookMap);
                    break;
                case 5:
                    exit = true;
                    break;
                default:
                    System.out.println("请输入正确的选项！");
                    break;
            }
        }

        scanner.close();
    }

    private static void addBook(Scanner scanner, HashMap<String, ArrayList<Book>> bookMap) {
        System.out.println("请输入书名：");
        String name = scanner.next();
        System.out.println("请输入作者：");
        String author = scanner.next();
        System.out.println("请输入出版社：");
        String publisher = scanner.next();
        System.out.println("请输入出版日期：");
        String publishDate = scanner.next();

        Book book = new Book(name, author, publisher, publishDate);
        ArrayList<Book> bookList = bookMap.get(name);
        if (bookList == null) {
            bookList = new ArrayList<>();
        }
        bookList.add(book);
        bookMap.put(name, bookList);
        System.out.println("添加成功！");
    }

    private static void lendBook(Scanner scanner, HashMap<String, ArrayList<Book>> bookMap) {
        System.out.println("请输入书名：");
        String name = scanner.next();

        ArrayList<Book> bookList = bookMap.get(name);
        if (bookList == null || bookList.isEmpty()) {
            System.out.println("没有找到该书！");
            return;
        }

        Book book = bookList.get(0);
        bookList.remove(0);
        System.out.println("借出成功！");
    }

    private static void returnBook(Scanner scanner, HashMap<String, ArrayList<Book>> bookMap) {
        System.out.println("请输入书名：");
        String name = scanner.next();

        ArrayList<Book> bookList = bookMap.get(name);
        if (bookList == null) {
            bookList = new ArrayList<>();
            bookMap.put(name, bookList);
        }

        System.out.println("请输入作者：");
        String author = scanner.next();
        System.out.println("请输入出版社：");
        String publisher = scanner.next();
        System.out.println("请输入出版日期：");
        String publishDate = scanner.next();

        Book book = new Book(name, author, publisher, publishDate);
        bookList.add(book);
        System.out.println("归还成功！");
    }

    private static void showBooks(HashMap<String, ArrayList<Book>> bookMap) {
        System.out.println("图书列表：");
        for (String name : bookMap.keySet()) {
            ArrayList<Book> bookList = bookMap.get(name);
            System.out.println(name + "：" + bookList.size() + "本");
        }
    }
}

class Book {
    private String name;
    private String author;
    private String publisher;
    private String publishDate;

    public Book(String name, String author, String publisher, String publishDate) {
        this.name = name;
        this.author = author;
        this.publisher = publisher;
        this.publishDate = publishDate;
    }

    public String getName() {
        return name;
    }

    public String getAuthor() {
        return author;
    }

    public String getPublisher() {
        return publisher;
    }

    public String getPublishDate() {
        return publishDate;
    }
}

这个代码使用了 `HashMap` 存储图书信息，其中以书名作为键，以一个 `ArrayList` 存储相同书名的不同副本。可以通过添加、借出、归还和查看图书等操作管理图书。