使用Hibernate将文件保存在mysql数据库中

@Entity
public class FileEntity {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;
    private String fileName;
    private String fileType;
    @Lob
    private byte[] fileContent;
    // getters and setters
}

public class FileDao {
    private SessionFactory sessionFactory;

    public void saveFile(FileEntity file) {
        Session session = sessionFactory.openSession();
        session.beginTransaction();
        session.save(file);
        session.getTransaction().commit();
        session.close();
    }

    public FileEntity getFileById(Long id) {
        Session session = sessionFactory.openSession();
        FileEntity file = session.get(FileEntity.class, id);
        session.close();
        return file;
    }
}