Java快速實(shí)現(xiàn)圖書管理基本功能

第Java快速實(shí)現(xiàn)圖書管理基本功能目錄前言主函數(shù)書的創(chuàng)建對(duì)用戶的操作對(duì)書的操作

前言

今天的內(nèi)容主要是利用前面所學(xué)的知識(shí)點(diǎn)：類，抽象類，封裝，繼承，多態(tài)，接口等進(jìn)行的一個(gè)簡(jiǎn)單的代碼練習(xí)。

主要要求：

1、用戶登錄

2、管理端

查找圖書新增圖書刪減圖書顯示圖書列表退出系統(tǒng)

3、用戶端

查找圖書借閱圖書歸還圖書退出系統(tǒng)

我們可以將以上內(nèi)容分為對(duì)書的創(chuàng)建初始化，對(duì)用戶的操作，對(duì)書的操作。

主函數(shù)

Main：（對(duì)所有流程進(jìn)行整合）

importbook.BookList;

importUser.NormalUser;

importUser.AdminUser;

importUser.user;

importjava.util.Scanner;

publicclassMain{

publicstaticuserlogin(){

System.out.print("請(qǐng)輸入你的姓名:");

Scannerscanner=newScanner(System.in);

Stringname=scanner.nextLine();

System.out.println("請(qǐng)選擇你的身份：1-管理員0-普通用戶");

intchoice=scanner.nextInt();

if(choice==1){

returnnewAdminUser(name);

}else{

returnnewNormalUser(name);

publicstaticvoidmain(String[]args){

BookListbookList=newBookList();

userus=login();//向上轉(zhuǎn)型

while(true){

intchoice=us.menu();//多態(tài)綁定

us.doWork(choice,bookList);

}

書的創(chuàng)建

Book:

packagebook;

//創(chuàng)建圖書

publicclassBook{

privateStringname;//書名

privateStringauthor;//書的作者

privateStringtype;//書的類型

privateintprice;//書的價(jià)格

booleanisBorrowed;//書是否被借出

//在這里我們就不對(duì)isBorrowed進(jìn)行構(gòu)造，在最后打印的時(shí)候?qū)λM(jìn)行判斷就好

publicBook(Stringname,Stringauthor,Stringtype,intprice){

=name;

this.author=author;

this.type=type;

this.price=price;

publicStringgetName(){

returnname;

publicvoidsetName(Stringname){

=name;

publicStringgetAuthor(){

returnauthor;

publicvoidsetAuthor(Stringauthor){

this.author=author;

publicStringgetType(){

returntype;

publicvoidsetType(Stringtype){

this.type=type;

publicintgetPrice(){

returnprice;

publicvoidsetPrice(intprice){

this.price=price;

publicbooleanisBorrowed(){

returnisBorrowed;

publicvoidsetBorrowed(booleanborrowed){

isBorrowed=borrowed;

@Override

publicStringtoString(){

return"Book{"+

"name='"+name+'\''+

",author='"+author+'''+

",type='"+type+'\''+

",price="+price+

((isBorrowed==true)"已被借出":"未被借出")+

'}';

}

BookList:

packagebook;

//創(chuàng)建書架

publicclassBookList{

privateBook[]books=newBook[10];//創(chuàng)建一個(gè)數(shù)組當(dāng)書架放書，假設(shè)一共可以放10本

publicintusedSize;//書架上有效放書數(shù)

publicBookList(){//假設(shè)一開始書架上就放了三本書

books[0]=newBook("紅樓夢(mèng)","曹雪芹","文學(xué)",55);

books[1]=newBook("西游記","吳承恩","文學(xué)",65);

books[2]=newBook("水滸傳","施耐庵","文學(xué)",23);

usedSize=3;

publicintgetUsedSize(){

returnusedSize;

publicvoidsetUsedSize(intusedSize){

this.usedSize=usedSize;

//獲取一本書的位置

publicBookgetpos(intpos){

returnthis.books[pos];

//在下標(biāo)為pos的位置上放一本書（添加）

publicvoidsetBook(intpos,Bookbook){

this.books[pos]=book;

}

對(duì)用戶的操作

創(chuàng)建用戶user類：

packageUser;

importbook.BookList;

importoperation.IOperation;

publicabstractclassuser{

protectedStringname;

protectedIOperation[]iOperations;//創(chuàng)建操作類數(shù)組，通過返回的數(shù)字用于對(duì)書的操作

publicuser(Stringname){

=name;

publicabstractintmenu();//用于動(dòng)態(tài)綁定

publicvoiddoWork(intchoice,BookListbookList){

iOperations[choice].work(bookList);

}

創(chuàng)建管理員用戶類AdminUser，是user的子類.

packageUser;

importoperation.*;

importjava.util.Scanner;

publicclassAdminUserextendsuser{

publicAdminUser(Stringname){

super(name);

this.iOperations=newIOperation[]{//初始化數(shù)組，將菜單上的數(shù)字與對(duì)應(yīng)的操作放好

newExitOperation(),

newFindOperation(),

newAddOperation(),

newDelOperation(),

newDisplayOperation()

publicintmenu(){

System.out.println("========管理員的菜單========");

System.out.println("歡迎"++"來到圖書館");

System.out.println("1.查找圖書");

System.out.println("2.新增圖書");

System.out.println("3.刪減圖書");

System.out.println("4.顯示圖書");

System.out.println("0.查退出系統(tǒng)");

System.out.println("===========================");

System.out.print("請(qǐng)選擇你要的操作：");

Scannerscanner=newScanner(System.in);

intchoice=scanner.nextInt();

returnchoice;//返回選擇的數(shù)字

}

創(chuàng)建普通用戶類NormalUser,是user的子類.

packageUser;

importoperation.*;

importjava.util.Scanner;

publicclassNormalUserextendsuser{

publicNormalUser(Stringname){

super(name);

this.iOperations=newIOperation[]{

newExitOperation(),

newFindOperation(),

newBorrowOperation(),

newReturnOperation()

publicintmenu(){

System.out.println("========普通用戶的菜單========");

System.out.println("歡迎"++"來到圖書館");

System.out.println("1.查找圖書");

System.out.println("2.借閱圖書");

System.out.println("3.歸還圖書");

System.out.println("0.退出系統(tǒng)");

System.out.println("============================");

System.out.print("請(qǐng)選擇你要的操作：");

Scannerscanner=newScanner(System.in);

intchoice=scanner.nextInt();

returnchoice;

}

對(duì)書的操作

創(chuàng)建接口IOperation：

packageoperation;

importbook.BookList;

importjava.util.Scanner;

publicinterfaceIOperation{

Scannerscanner=newScanner(System.in);

voidwork(BookListbookList);

}

創(chuàng)建增加圖書類AddOperation，繼承接口IOperation

packageoperation;

importbook.Book;

importbook.BookList;

importjava.util.Scanner;

publicclassAddOperationimplementsIOperation{

publicvoidwork(BookListbookList){

System.out.println("新增圖書！");

System.out.println("請(qǐng)輸入圖書的名字1請(qǐng)輸入圖書的作者2請(qǐng)輸入圖書的類型3請(qǐng)輸入圖書的價(jià)格4新增圖書成功");

}

創(chuàng)建刪減圖書類DelOperation，繼承接口IOperation

packageoperation;

importbook.Book;

importbook.BookList;

publicclassDelOperationimplementsIOperation{

publicvoidwork(BookListbookList){

System.out.println("刪減圖書");

System.out.println("請(qǐng)輸入要?jiǎng)h減圖書的名字：");

Stringname=scanner.nextLine();

intsize=bookList.getUsedSize();

intindex=0;

inti=0;

for(i=0;isize;i++){

Bookbook=bookList.getpos(i);

if(name.equals(book.getName())){

index=i;

break;

if(i=size){

System.out.println("沒有你要?jiǎng)h除的圖書");

//刪除就是要將j+1下標(biāo)的信息放進(jìn)j下標(biāo)里面信息去，這樣子j里面的信息就被刪除了

for(intj=index;jsize-1;j++){

Bookbook=bookList.getpos(j+1);//獲取j+1下標(biāo)放的書的信息給j下標(biāo)

bookList.setBook(j,book);

bookList.setBook(size,null);//刪除之后，把最后一個(gè)下標(biāo)信息置為null

bookList.setUsedSize(size-1);//下標(biāo)減1

System.out.println("刪除成功");

}

創(chuàng)建查找圖書類FindOperation，繼承接口IOperation

packageoperation;

importbook.BookList;

importbook.Book;

publicclassFindOperationimplementsIOperation{

publicvoidwork(BookListbookList){

System.out.println("查找圖書！");

System.out.println("請(qǐng)輸入要查找書的名字");

Stringname=scanner.nextLine();

intsize=bookList.getUsedSize();

for(inti=0;isize;i++){

Bookbook=bookList.getpos(i);//找到這本書的信息

if(name.equals(book.getName())){//比較名字是否相同

System.out.println("找到了這本書，信息如下：");

System.out.println(book);

return;

System.out.println("沒有找到這本書！");

}

創(chuàng)建顯示圖書列表類DisplayOperation，繼承接口IOperation

packageoperation;

importbook.Book;

importbook.BookList;

publicclassDisplayOperationimplementsIOperation{

publicvoidwork(BookListbookList){

System.out.println("顯示圖書");

for(inti=0;ibookList.usedSize;i++){

Bookbook=bookList.getpos(i);

System.out.println(book);

}

創(chuàng)建借閱圖書列表類BorrowOperation，繼承接口IOperation

packageoperation;

importbook.Book;

importbook.BookList;

publicclassBorrowOperationimplementsIOperation{

publicvoidwork(BookListbookList){

System.out.println("借閱圖書");

System.out.println("請(qǐng)輸入你要借閱的圖書的名字");

Stringname=scanner.nextLine();

intsize=bookList.getUsedSize();

for(inti=0;isize;i++){

Bookbook=bookList.getpos(i);

if(name.equals(book.getName())){

book.setBorrowed(true);

System.out.println("借閱成功");

System.out.println(book);

return;

Syst