关键抽象

BookModel

- bookID: int- publisherID: int- bookName: string- bookAuthor: string- bookPrice: int- bookImg: byte[]- bookCampus: string- bookTag: string- bookDescription: string- phoneNum: string- bookComment: string

+ setPublisherID(int): void+ getPublisherID(): int+ setBookID:(int): void+ getBookID:(): int+ setBookName(string): void+ getBookName(): string+ setBookAuthor(string): void+ getBookAuthor(): string+ setBookPrice(int): void+ getBookPrice(): int+ setBookImg(byte[]): void+ getBookImg(): byte[]+ setBookCampus(string): void+ getBookCampus(): string+ setBookTag(string): void+ getBookTag(): string+ setBookDescription(string): void+ getBookDescription(): string+ setPhoneNum(string): void+ getPhoneNum(): string+ setBookComment(string): void+ getBookComment(): string

TradeModel

+ getTradeID(): int+ getTradeBuyerID(): int+ getTradeSellerID(): int+ getTradeBookID(): int+ setState(string): void+ getState(): string

- tradeID: int- buyerID: int- sellerD: int- bookID: string- state: string

MessageModel

- messageID: int- sessionID: int- senderID: int- receiverD: int- messageContent: string- messageTime: string

+ getMessageID(): int+ getSessionID(): int+ getSenderID(): int+ getReceiverID(): int+ getMessageContent(): string+ getMessageTime(): string

SessionModel

- sessionID: int- buyerID: int- sellerD: int

+ getSessionID(): int+ getBuyerID(): int+ getSellerID(): int

UserModel

- studentID: int- idNum: int- password: string- institute: string- portrait: byte[]

+ getStudentID(): int+ getIdNum(): int+ setPassword(string): void+ getPassword(): string+ setInstitute(string): void+ getInstitute(): string+ setPortrait(byte[]): void+ getPortrait(): byte[]