ClassT

Manage

-MId:String-MPassword:String

AddUseer()DeleteUerse()AddCourse()DeleteCourse()

Score

-ScoreId:String-ScoreName:String-ScoreTeacher:StringScore:Integer

Score()

Student

-SId:String-SName:String-SPassword:String-SClass:String-Sex:String-Age:int

QueryScore()Information()AddCouese()

Course

CourseId:StringCourse_Name:StringCourse_TeacherString

Course()

n:1

1:n

n:n

Teacher

-TId:String-TPassword:String-TName:String-Sex:String

AddCourse()ReviseCourse()AddScore()RevisScore()