该考勤管理系统实现有如下功能：上班时间的设定、员工出入单位的情况记录、 请假、加班和出差情况的记录、月底进行本月的出勤情况统计。 -The attendance management system to achieve the following functions: setting working hours, employees access to flats by the record, leave, overtime and travel records of the situa