学生考勤系统数据库模型图

Teacher

- tea_id:String- tea_name:String- tea_sex:String- password:String- login:boolean

+ login():void+ getCourse():void+ signCheck():void+ requestSign():void+ showSignResults():void+ getCourseInformation():void+ chooseCourse():void+ getRecord():void+ selectRecord():void+ changePassword():void+ logout():void

Classroom

- cr_id:String- cr_name:String- cr_location:String

Sign

- objectId:String- course_id:String- course_name:String- stu_id:String- stu_name:String- cr_id:String- cr_name:String- signup_time:Date- signin_time:Date- sign_duration:int- sign_state:boolean

Course

- course_id:String- course_name:String- tea_id:String- tea_name:String- cr_id:String- cr_name:String- course_stime:Date- course_time:String- course_etime:Date

Student

- stu_id:String- stu_name:String- stu_sex:String- password:String- login:boolean- choose_course:String

+ login():void+ signCheck():void+ locationJudging():void+ getLocation(Array location):void+ sign():void+ getCourseInformation():void+ chooseCourse():void+ getRecord():void+ changePassword():void+ logout():void