FileFile
typename: string
date: Date []
datenumber: int
creat()
find()
insert()
delete()
update()
DateDate
typename: string
id: int
borrow:string[]
creat()
update()
图表图表 文件记录文件记录 视频视频 照片照片光盘光盘
DateFactoryDateFactory
creatDate()
UserUser
username: string
userid: int
passwd: string
update()
create()
apply()
revert()
DataBaseDataBase
users: User[]
staffs: Staff[]
Files: File[]
StaffStaff
staffname: string
staffid: int
staffpower: int
ReadFiles()
UpdateFiles()
InsertFiles()
DeleteFiles()
FindFiles()
ReadUser()
EA()
check()
AdministratorsAdministrators
ReadFiles()
UpdateFiles()
InsertFiles()
DeleteFiles()
FindFiles()
ReadStaffs()
UpdateStaffs()
InsertStaffs()
DeleteStaffs()
FindStaffs()
ReadUsers()
UpdateUsers()
InsertUsers()
DeleteUsers()
FindUsers()
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