imageio-ffmpeg:Python 视频处理的轻量封装
2026/6/8 15:37:17
以下是一个基于Java的无人图书借阅系统源码解析,涵盖系统架构、核心功能模块、关键代码示例及技术实现要点:
技术选型:
架构模式:
图书管理模块:
借阅管理模块:
用户管理模块:
捐赠管理模块:
数据分析与报表模块:
java
public class Book { private Long id; private String title; private String author; private String isbn; private String category; private Integer totalCopies; private Integer availableCopies; private Date publishDate; // 构造方法、getter/setter省略 }java
public class BorrowRecord { private Long id; private Long userId; private Long bookId; private Date borrowTime; private Date returnTime; private Date dueTime; private Boolean isOverdue; private String remarks; // 构造方法、getter/setter省略 }java
@Service public class BookService { @Autowired private BookMapper bookMapper; @Autowired private RedisTemplate<String, Integer> redisTemplate; // 查询图书列表(支持模糊搜索) public List<Book> queryBooks(String keyword) { // 实现模糊搜索逻辑,返回图书列表 } // 预约图书 @Transactional public Boolean reserveBook(Long bookId, Long userId) { // 1. 检查图书库存 String stockKey = "stock:" + bookId; Integer currentStock = redisTemplate.opsForValue().get(stockKey); if (currentStock == null || currentStock <= 0) { throw new BusinessException("图书已借完"); } // 2. 扣减库存(使用Redis原子操作) String luaScript = "local key = KEYS[1]\n" + "local count = tonumber(ARGV[1])\n" + "local current = tonumber(redis.call('GET', key))\n" + "if current >= count then\n" + " redis.call('DECRBY', key, count)\n" + " return 1\n" + "else\n" + " return 0\n" + "end"; Boolean success = redisTemplate.execute( new DefaultRedisScript<>(luaScript, Boolean.class), Collections.singletonList(stockKey), String.valueOf(1) ); if (Boolean.FALSE.equals(success)) { throw new BusinessException("预约失败,请重试"); } // 3. 创建借阅记录(异步处理) mqProducer.sendBorrowMessage(userId, bookId); return true; } }性能优化:
安全性保护:
异常处理: