Java开发图书库存管理工具教程

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

// Getter 和 Setter 方法
public String getTitle() { return title; }
public String getIsbn() { return isbn; }
public int getStock() { return stock; }
public void setStock(int stock) { this.stock = stock; }

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

import java.util.HashMap;
import java.util.Map;
public class InventoryManager {
private Map books;
public InventoryManager() {
    books = new HashMap<>();
}

// 添加图书
public void addBook(Book book) {
    if (books.containsKey(book.getIsbn())) {
        Book existing = books.get(book.getIsbn());
        existing.setStock(existing.getStock() + book.getStock());
    } else {
        books.put(book.getIsbn(), book);
    }
}

// 删除图书
public boolean removeBook(String isbn) {
    return books.remove(isbn) != null;
}

// 查询图书
public Book findBook(String isbn) {
    return books.get(isbn);
}

// 更新库存
public boolean updateStock(String isbn, int newStock) {
    Book book = books.get(isbn);
    if (book != null) {
        book.setStock(newStock);
        return true;
    }
    return false;
}

// 显示所有图书
public void listAllBooks() {
    if (books.isEmpty()) {
        System.out.println("库存为空。");
    } else {
        books.values().forEach(System.out::println);
    }
}
}

import java.util.Scanner;
public class Main {
public static void main(String[] args) {
InventoryManager manager = new InventoryManager();
Scanner scanner = new Scanner(System.in);
boolean running = true;
    while (running) {
        System.out.println("\n--- 图书库存管理系统 ---");
        System.out.println("1. 添加图书");
        System.out.println("2. 查询图书");
        System.out.println("3. 更新库存");
        System.out.println("4. 删除图书");
        System.out.println("5. 查看所有图书");
        System.out.println("6. 退出");
        System.out.print("请选择操作: ");

        int choice = scanner.nextInt();
        scanner.nextLine(); // 消费换行符

        switch (choice) {
            case 1:
                System.out.print("书名: ");
                String title = scanner.nextLine();
                System.out.print("作者: ");
                String author = scanner.nextLine();
                System.out.print("ISBN: ");
                String isbn = scanner.nextLine();
                System.out.print("年份: ");
                int year = scanner.nextInt();
                System.out.print("库存数量: ");
                int stock = scanner.nextInt();
                scanner.nextLine();

                Book newBook = new Book(title, author, isbn, year, stock);
                manager.addBook(newBook);
                System.out.println("图书已添加。");
                break;

            case 2:
                System.out.print("输入ISBN查询: ");
                String searchIsbn = scanner.nextLine();
                Book found = manager.findBook(searchIsbn);
                if (found != null) {
                    System.out.println(found);
                } else {
                    System.out.println("未找到该图书。");
                }
                break;

            case 3:
                System.out.print("输入ISBN: ");
                String updateIsbn = scanner.nextLine();
                System.out.print("新库存数量: ");
                int newStock = scanner.nextInt();
                scanner.nextLine();
                if (manager.updateStock(updateIsbn, newStock)) {
                    System.out.println("库存已更新。");
                } else {
                    System.out.println("未找到该图书。");
                }
                break;

            case 4:
                System.out.print("输入要删除的ISBN: ");
                String delIsbn = scanner.nextLine();
                if (manager.removeBook(delIsbn)) {
                    System.out.println("图书已删除。");
                } else {
                    System.out.println("未找到该图书。");
                }
                break;

            case 5:
                manager.listAllBooks();
                break;

            case 6:
                running = false;
                System.out.println("系统已退出。");
                break;

            default:
                System.out.println("无效选择，请重试。");
        }
    }
    scanner.close();
}
}