初步建立数据库保存数据
Signed-off-by: shaolijuan <2277566270@qq.com>
改了几个bug，增加了对班级、学生的操作
Signed-off-by: shaolijuan <2277566270@qq.com>
导出完成
Signed-off-by: shaolijuan <2277566270@qq.com>
改了些bug
Signed-off-by: shaolijuan <2277566270@qq.com>
增加了提醒功能（可以向未出勤同学发送短信）
Signed-off-by: shaolijuan <2277566270@qq.com>
本地导入完成
Signed-off-by: shaolijuan <2277566270@qq.com>