高级课类 Upper
+ courseSymbol=300
0...n
1...1
班级类 Class
+ studentNumber:integer+ classID:String+ teacherID:String
学生类 Student
+ studentID:String+ studentPWD:String+ studentAddress:String+ studentName:String+ studentGrade:integer+ studentClass:integer
- studentUpdate():boolean- addCourse(Course):void- delCourse(Course):void- wdCourse(Course):void- getCourses():void
副教授类 Associate
+ teacherTitle=300
基础课类 Lower
+ courseSymbol=100
大四学生类 Senior
+ studentGrade=500
研究生课类 Grad
+ courseSymbol=500
教师类 Teacher
+ teacherID:String+ teacherPWD:String+ teacherAddress:String+ teacherName:String+ teacherTitle:integer
- teacherUpdate():boolean- addCourse(Course):void- delCourse(Course):void- getCourses():void
用户类 User
+ ID:String+ PWD:String+ address:String+ name:String
- loginCheck()
大三学生类 Junior
+ studentGrade=300
课程类 Course
+ courseID:String+ courseSymbol：integer+ courseName:String+ courseInfo:String+ teacherID:String+ teacherTitle:integer
- courseUpdate():boolean- getInfo():void
选课类 Select
+ studentId:String+ teacherId:String+ courseId:String+ score:char
- submitScore():boolean- delSelect():void
助教类 Assistant
+ teacherTitle=100
教授类 Full
+ teacherTitle=500
大二学生类 Sophomore
+ studentGrade=200
大一学生类 Freshman
+ studentGrade=100
管理员类 Admin
+ adminID:String+ adminPWD:String+ adminAddress:String+ adminName:String
- adminUpdate():boolean- getTeacher(Teacher):void- getStudent(Student):void- getCourseInfo():void
