java控制台输出图书馆管理系统

package com.jiaxun.library.data;
 
public class UserData {
 private String username = "小询";//用户名
 private String password = "zengjiaxun";//密码
 public String getUser() {
 return username;
 }
 public String getPassword() {
 return password;
 }
 
}

package com.jiaxun.library.data;
 
 
public class BookData {
 //书库
 public BookData() {
 {
 String noreaders= "无";
 for (int i = 0; i < borrowreaders.length; i++) {
 borrowreaders[i]=noreaders;
 }
 for (int i = 0; i < 5; i++) {
 switch (i) {
 case 0:
  booknames[i]="神级强者在都市";
  authors[i]="日当午";
  pubdates[i]="2016-03-31";
  sumpaginations[i]="1320";
  break;
 case 1:
  booknames[i]="都市修仙高手";
  authors[i]="雪无泪";
  pubdates[i]="2017-07-25";
  sumpaginations[i]="656";
  break;
 case 2:
  booknames[i]="护花神兵";
  authors[i]="鸡飞蛋打";
  pubdates[i]="2016-01-31";
  sumpaginations[i]="1120";
  break;
 case 3:
  booknames[i]="七界仙尊 ";
  authors[i]="无良书生";
  pubdates[i]="2017-04-04";
  sumpaginations[i]="1310";
  break;
 case 4:
  booknames[i]="恋上调皮公主";
  authors[i]="残落筱筱";
  pubdates[i]="2012-08-20";
  sumpaginations[i]="954";
  break;
 }
 }
    
 }
 }
 
 public String[] booknames = new String[10];// 书名
 public String[] authors = new String[10];// 作者
 public String[] pubdates = new String[10];// 出版日期
 public String[] sumpaginations = new String[10];// 总页数
 public String[] borrowreaders = new String[10];// 借阅人
 
}

package com.jiaxun.library.bo;
 
import java.util.Scanner;
 
import com.jiaxun.library.data.BookData;
import com.jiaxun.library.data.UserData;
 
public class Bo {
 public static BookData book = new BookData();
 UserData user = new UserData();
 // 管理员登录验证
 public int login(String username, String password) {
 if (username.equals(user.getUser())) {
 if (password.equals(user.getPassword())) {
 return 1;// 账号和密码验证通过
 } else {
 return 0;// 密码错误
 }
 } else {
 return -1;// 账号不存在
 }
 }
 /*
 * 菜单功能展示列表
 * 
 * 图书信息展示功能
 */
 public void showBook() {
 System.out.println("本图书馆共有" + (book.booknames.length - remainSpace()) + "本书");
 int a = bookinfo();
 if (a == 0) {
 // 展示所有图书信息
 showAll();
 } else if (a > 0 && a <= book.booknames.length) {
 // 展示相关图书信息
 showPart(a);
 } else {
 System.out.println("输入的编号不合法！");
 showBook();
 }
 }
 // 展示所有图书信息
 public void showAll() {
 for (int i = 0; i < book.booknames.length; i++) {
 if (book.booknames[i] != null) {
 System.out.println("---------------------------------------编号" + (i + 1)
  + "--------------------------------------------------------------");
 System.out.println("书籍编号为" + (i + 1) + "的详细信息为：");
 System.out.print("书名：" + book.booknames[i] + " ");
 System.out.print("作者：" + book.authors[i] + " ");
 System.out.print("出版日期：" + book.pubdates[i] + " ");
 System.out.print("总页数：" + book.sumpaginations[i] + " ");
 System.out.println("借阅者：" + book.borrowreaders[i]);
 }
 }
 System.out.println(
 "---------------------------------------------------------------------------------------------------------");
 }
 // 展示相关图书信息
 public void showPart(int a) {
 int i = a;
 System.out.println(
 "---------------分界线---------------------------------------------------------------------------------------------------");
 System.out.println("书籍编号" + (i) + "的详细信息为：");
 System.out.print("书名：" + book.booknames[i - 1] + " ");
 System.out.println("作者：" + book.authors[i - 1] + " ");
 System.out.print("出版日期：" + book.pubdates[i - 1] + " ");
 System.out.print("总页数：" + book.sumpaginations[i - 1] + " ");
 System.out.println("借阅者：" + book.borrowreaders[i - 1]);
 System.out.println(
 "---------------------------------------------------------------分界线---------------------------------------------------");
 }
 //根据编号判断要全局展示还是部分展示
 public int bookinfo() {
 for (int i = 0; i < book.booknames.length; i++) {
 if (book.booknames[i] != null) {
 System.out.println("书名编号" + (i + 1) + "：" + book.booknames[i] + " ");
 }
 }
 System.out.print("输入相应编号即可查看相应书籍的详细信息(输入0则查看所有信息)：");
 Scanner scanner = new Scanner(System.in);
 int i = scanner.nextInt();
 return i;
 }
 // 录入新书籍判断
 public int addBook(String bookname, String author, String pubdate, String sumpagination) {
 int flag = 0;// 1为成功，0为图书馆已经存在该新书，-1为仓库爆满
 if (book.booknames[book.booknames.length - 1] != null) {
 flag = -1;// 爆满
 }
 if (book.booknames[book.booknames.length - 1] == null) {
 
 for (int i = 0; i < book.booknames.length; i++) {
 
 if (bookname.equals(book.booknames[i])) {
  flag = 0;// 已存在book.booknames[i]
  break;
 }
 if (!(bookname.equals(book.booknames[i]))) {
  // 添加书籍
  add(bookname, author, pubdate, sumpagination);
  flag = 1;// 成功
  break;
 }
 }
 }
 return flag;
 }
 // 录入新书籍
 public void add(String bookname, String author, String pubdate, String sumpagination) {
 for (int i = 0; i < book.booknames.length; i++) {
 if (book.booknames[i] == null) {
 book.booknames[i] = bookname;
 book.authors[i] = author;
 book.pubdates[i] = pubdate;
 book.sumpaginations[i] = sumpagination;
 break;
 }
 }
 }
 // 存放书本的剩余容量
 public int remainSpace() {
 int count = 0;
 try {
 for (int i = 0; i < book.booknames.length; i++) {
 if (book.booknames[i] == null) {
  ++count;
 }
 }
 } catch (Exception e) {
 // TODO: handle exception
 }
 return count;
 }
 // 修改时根据书名查找相关的书籍信息
 public int selectBook(String bookname) {
 int flag = 0;
 for (int i = 0; i < book.booknames.length; i++) {
 if (bookname.equals("")) {
 flag = -1;// -1为未输入书名
 break;
 }
 // 其他情况下为匹配馆里的图书
 if (bookname.equals(book.booknames[i])) {
 flag = 1;// 1找到相关书名
 showPart(i + 1);
 break;
 }
 if (!bookname.equals(book.booknames[i])) {
 if (i == book.booknames.length - 1) {
  flag = 0;// 0为未找到
 }
 }
 }
 return flag;
 }
 // 根据书名查找索引，有此书返其索引，无返-1
 public int selectIndex(String bookname) {
 int flag = -1;
 for (int i = 0; i < book.booknames.length; i++) {
 if (bookname.equals(book.booknames[i])) {
 flag = i;
 }
 }
 return flag;// 找不到此书
 }
 // 修改书籍信息 1书名 2作者 3出版日期 4总页数 5借阅者
 public void modinfo(int a, String value, int index) {
 
 switch (a) {
 case 1:
 book.booknames[index] = value;
 break;
 
 case 2:
 book.authors[index] = value;
 break;
 case 3:
 book.pubdates[index] = value;
 break;
 case 4:
 book.sumpaginations[index] = value;
 break;
 case 5:
 book.borrowreaders[index] = value;
 break;
 }
 
 }
 // 删除书籍功能
 public void deleteBook(String bookname) {
 int a = selectIndex(bookname);
 book.booknames[a] = null;
 book.authors[a] = null;
 book.pubdates[a] = null;
 book.sumpaginations[a] = null;
 book.booknames[a] = null;
 
 }
 // 检查书是否存在馆里和是否已借出
 public int testReader(String bookname) {
 
 // 馆里有此书，查找此书的索引，有此书a>=0，无返-1
 int a = selectIndex(bookname);
 // 馆里有此书
 if (a >= 0) {
 if ((book.borrowreaders[a].equals("无") || book.borrowreaders[a].equals("")))// 无人借此书，""为扫描器的直接回车值
 return 0;//未借
 else
 return 1;//已借
 } else {
 return -1;// 馆里没有此书
 }
 
 }
 //将借阅者设置为无或者为空
 public void setBorrowReader(String bookname){
 int a = selectIndex(bookname);
 book.borrowreaders[a]="无";
 }
 //查询指定书的借阅者
 public String getBorrowReader(String bookname){
 int a = selectIndex(bookname);
 return book.borrowreaders[a];
 }
 
 //书籍借阅功能
 public void borrow(String bookname,String readername){
 int a = selectBook(bookname);
 book.borrowreaders[a]=readername;
 }
}

package com.jiaxun.library.ui;
 
import java.util.Scanner;
 
import com.jiaxun.library.bo.Bo;
 
public class LibraryUI {
 
 Bo bo = new Bo();
 
 public static void main(String[] args) {
 LibraryUI ui = new LibraryUI();
 ui.welcome();// 欢迎界面
 
 }
 
 // 欢迎界面
 public void welcome() {
 System.out.println("*********************************");
 System.out.println("********小☆询图书馆管理系统********");
 System.out.println("*********************************");
 loginBoundary();// 登录界面
 }
 
 // 管理员登录界面
 public void loginBoundary() {
 System.out.print("管理员账号：");
 Scanner scanner = new Scanner(System.in);
 String username = scanner.nextLine();
 System.out.print("登 录 密 码 ：");
 Scanner scanner1 = new Scanner(System.in);
 String password = scanner1.nextLine();
 int flag = bo.login(username, password);// 登录验证
 switch (flag) {
 case 0:// 密码错误
 System.out.println("密码错误，请重新输入。");
 loginBoundary();
 break;
 
 case 1:// 验证通过
 System.out.println("登录成功！");
 showMenu();// 登录成功后跳转至菜单功能管理
 break;
 case -1:// 账户不存在
 System.out.println("您输入的管理员账号不存在，请确认后再输入。");
 loginBoundary();
 break;
 }
 }
 
 // 菜单功能展示列表
 public void showMenu() {
 System.out.println("请输入功能编号进入相应的功能：");
 System.out.println("所有的图书信息——编号：1");
 System.out.println("录入新的书籍——编号：2");
 System.out.println("修改书籍基本信息——编号：3");
 System.out.println("删除书籍功能——编号：4");
 System.out.println("还书功能——编号：5");
 System.out.println("书籍借阅功能——编号：6");
 System.out.println("退出系统——编号：7");
 System.out.print("请输入功能编号：");
 Scanner scanner = new Scanner(System.in);
 int a = scanner.nextInt();//
 switch (a) {
 case 1:// 图书信息
 showBook();
 returnMethod();// 返回主菜单
 break;
 case 2:// 录入新书籍
 addBook();
 break;
 case 3:// 修改书籍基本信息
 modBookInfo();
 break;
 case 4:// 删除书籍
 delete();
 break;
 case 5:// 还书
 returnBook();
 break;
 case 6:// 借阅
 borrowBook();
 break;
 case 7:// 退出登录
 welcome();
 scanner.close();
 break;
 }
 }
 
 // 返回主菜单功能
 public void returnMethod() {
 System.out.print("按下ENTER键返回到功能主菜单：");
 Scanner scanner = new Scanner(System.in);
 String i = scanner.nextLine();
 showMenu();
 }
 
 // 图书信息展示功能
 public void showBook() {
 bo.showBook();
 }
 
 // 录入新书籍功能
 public void addBook() {
 System.out.print("请输入要增加的书籍名称：");// 书名
 Scanner scanner = new Scanner(System.in);
 String bookname = scanner.nextLine();
 System.out.print("请输入" + bookname + "的作者：");// 作者
 Scanner scanner1 = new Scanner(System.in);
 String author = scanner1.nextLine();
 System.out.print("请输入" + bookname + "的出版日期（格式如2000-01-01）：");// 出版日期
 Scanner scanner2 = new Scanner(System.in);
 String pubdate = scanner2.nextLine();
 System.out.print("请输入" + bookname + "的总页数（页）：");// 总页数
 Scanner scanner3 = new Scanner(System.in);
 String sumpagination = scanner3.nextLine();
 int flag = bo.addBook(bookname, author, pubdate, sumpagination);
 // 1为成功，0为图书馆已经存在该新书，-1为仓库爆满
 switch (flag) {
 case 1:
 System.out.println("新书籍" + bookname + "添加成功，目前图书馆还有" + bo.remainSpace() + "个位置可以存放新书籍。");
 returnMethod();// 书籍添加界面中的返回功能，可选择继续添加或者回到主菜单
 break;
 case 0:
 System.out.println("添加书籍失败，" + bookname + "已存在该图书馆中！");
 returnMethod();// 书籍添加界面中的返回功能，可选择继续添加或者回到主菜单
 break;
 case -1:
 System.out.println("添加失败，图书馆已经存储量已经爆满了，请删除部分书籍后再进行添加。");
 showMenu();
 break;
 }
 }
 
 // 修改书籍信息
 public void modBookInfo() {
 System.out.print("请输入您要操作的书名：");
 Scanner scanner = new Scanner(System.in);
 String bookname = scanner.nextLine();
 // 根据书名查找相关的书籍信息
 int flag = bo.selectBook(bookname);
 switch (flag) {
 case 0:
 System.out.print("未找到相关书籍，输入0回车进入该层功能，输入1回车返回到功能主菜单。");
 int a = scanner.nextInt();
 if (a == 0) {
 modBookInfo();
 } else if (a == 1) {
 
 showMenu();
 }
 break;
 
 case -1:
 System.out.println("书名为空，输入0回车进入该层功能，输入1回车返回到功能主菜单。");
 int a1 = scanner.nextInt();
 if (a1 == 0) {
 modBookInfo();
 } else {
 showMenu();
 }
 break;
 
 case 1:
 System.out.print("以上信息为相关书名查找的结果，其中（数字“1”代表书名，数字“2”代表作者，数字“3”代表出版日期，数字“4”代表总页数，数字“5”代表借阅者）输入相关数字可以修改相关信息：");
 int a2 = scanner.nextInt();// 1书名 2作者 3出版日期 4总页数 5借阅者
 if (a2 > 0 && a2 < 6) {
 System.out.print("请输入您想修改的" + sortName(a2) + "：");
 Scanner scanner2 = new Scanner(System.in);
 String value = scanner2.nextLine();
 int index = bo.selectIndex(bookname);
 bo.modinfo(a2, value, index);
 System.out.println(bookname + "这本书的相关信息修改成功！");
 returnMethod();
 } else {
 System.out.println("您输入的数字不合法。请重试！");
 modBookInfo();
 }
 
 break;
 
 }
 }
 
 // 修改的分类名称
 public String sortName(int flag) {
 if (flag == 1)
 return "书名";
 if (flag == 2)
 return "作者";
 if (flag == 3)
 return "出版日期";
 if (flag == 4)
 return "总页数";
 else
 return "借阅者";
 }
 
 // 删除书籍功能
 public void delete() {
 System.out.print("请输入要被删除的书名：");
 Scanner scanner = new Scanner(System.in);
 String bookname = scanner.nextLine();
 int flag = bo.testReader(bookname);
 // 存在此书并无人借
 if (flag == 0) {
 bo.deleteBook(bookname);
 System.out.println(bookname + "已从图书馆成功移除！输入0回到主菜单，输入1则继续删除");
 delReturn();
 } else if (flag == 1) {// 有人借
 System.out.println("此书已借出，请等待归还后再删除。输入0回到主菜单，输入1则继续删除");
 delReturn();
 } else {// 不存在此书
 System.out.println("本馆不存在此书，请仔细较对。输入0回到主菜单，输入1则继续删除");
 delReturn();
 }
 
 }
 
 // 删除的返回操作
 public void delReturn() {
 
 Scanner scanner1 = new Scanner(System.in);
 int i = scanner1.nextInt();
 if (i == 0) {
 showMenu();
 } else if (i == 1) {
 delete();
 }
 }
 
 // 还书功能
 public void returnBook() {
 System.out.print("请输入要还的书籍名称：");
 Scanner scanner = new Scanner(System.in);
 String bookname = scanner.nextLine();
 int flag = bo.testReader(bookname);
 if (flag == 0) {
 System.out.println(bookname + "暂未借出。");
 System.out.print("输入0回车返回至主菜单，输入其他键则继续还书");
 String a = scanner.nextLine();
 if(a.equals("0")){
 showMenu();
 }else {
 returnBook();
 }
 } else if (flag == -1) {
 System.out.println(bookname + "不存在该图书馆中。");
 System.out.print("输入0回车返回至主菜单，输入其他键则继续还书");
 String a = scanner.nextLine();
 if(a.equals("0")){
 showMenu();
 }else {
 returnBook();
 }
 } else if (flag == 1) {
 
 System.out.println(bo.getBorrowReader(bookname) + "已经还书成功！");
 bo.setBorrowReader(bookname);
 System.out.print("输入0回车返回至主菜单，输入其他键则继续还书");
 String a = scanner.nextLine();
 if(a.equals("0")){
 showMenu();
 }else {
 returnBook();
 }
 }
 }
 
 // 书籍借阅功能
 public void borrowBook() {
 System.out.print("请输入要借的书名：");
 Scanner scanner = new Scanner(System.in);
 String bookname = scanner.nextLine();
 int flag = bo.testReader(bookname);
 switch (flag) {
 case 0://存在此书并无人借的情况
 
 System.out.println("请输入借阅者的名字：");
 String readername = scanner.nextLine();
 bo.borrow(bookname,readername);
 System.out.println(readername+"从该图书馆里借出了以"+bookname+"为名的书籍。");
 System.out.print("输入0回车返回至主菜单，输入1回车则继续借书：");
 int a0 = scanner.nextInt();
 if(a0==0)
  showMenu();
 if(a0==1)
  borrowBook();
 break;
 
 case 1://存在此书被借的情况
 System.out.println("借书失败，" + bookname + "已被借！");
 System.out.print("输入0回车返回至主菜单，输入1回车则继续借书：");
 int a = scanner.nextInt();
 switch (a) {
 case 0:
 showMenu();
 break;
 
 case 1:
 borrowBook();
 break;
 
 }
 case -1://不存在此书的情况
 System.out.println("借书失败，" + bookname + "不存在该图书馆中。");
 System.out.print("输入0回车返回至主菜单，输入1回车则继续借书：");
 int a1 = scanner.nextInt();
 switch (a1) {
 case 0:
 showMenu();
 break;
 
 case 1:
 borrowBook();
 break;
 
 }
 }
 }
}