2333333333333

userId: intbookId: intcount: int

AdminOperateRecord

Read(int id):bool

UserReader:FileReader

Date

FileWriter

User(Library lib):Login()name: char[]id: intrecords: Listfee: floatQueryBook(int bookId)//查询书籍位置和具体信息isHalted: bool//是否被冻结，欠款会被冻结，缴纳所以欠款就会解冻BorrowBook(Book book):boolContinueBorrowBook(Book book):boolReturnBook(Book book):boolPayFees(float fee):bool//学生交钱

User

BookKindWriter:FileWriter

name: char[]books: Listprice: floatpublishInfo: char[]state:bool

BookKind

Write(int id):bool

UserWriter:FileWriter

Read(int bookId):boolRead(BookKind bookKind):bool

BookReader:FileReader

Book

[Condition]

Record

fileReader: FileReaderfileWriter: FileWriterbookBuffer: ListrecordBuffer: List

Library

BookKindReader:FileReader

userId: intbookId: intCount: intdate: Date

UserOperateRecord

Admin

FileReader(Library lib):Read(char[] location):bool

FileReader

Write(int bookId):boolWrite(BookKind bookKind):bool

BookWriter:FileWriter