Student
role：intclassNum：intGradeNum：intPhoneNum：StringClassName：String
Teacher
role：intGradeNum：intPhoneNum：StringClassName：String
jilutem
id：intdefen：inttime：Stringdengji：StringjiluId：intneirongid：int
jilu
id：intdefen：inttime：StringFromUserId：intToUserId：intkind：String
User
id：intpassword：Stringtruename：Stringusername：String
Tongji
id：inthuping：intziping：intpingjiao：intshuliang1：intshuliang2：intpingjun1：Doublepingjun2：Double
Neirong
id：intDeletestatus：intNeirong：Stringkind：String
Admin
role：int
