java--模拟图书管理系统

//图书管理系统需要图书，书架，还有图书管理员。

图书：有名字，状态（借出去没）,日期，借出次数；

书架：存放图书的数组，最多存放多少本书，目前有多少本书；书架可以新增图书，获取书的名字，数量并可以设置，

可以把借出的图书按次数从高到低排序，可以查看所有图书的信息。

图书管理员：有一个书架，有借出时间和归还时间，能管理书架的费用，可以初始化系统里的书，能借书，还书，增加图书，删除图书，费用统计，

有一个主界面提供各种功能，比如：排行榜，增加删除借出归还统计图书等。

1.图书类

public class Book {

    //1.书名2.状态3.日期4.借出次数
    private  String bookname;
    private int status;//0:已借出1:可借
    private String data;
    private  int count;

    public Book(String bookname, int status, String data, int count) {//构造方法
        this.bookname=bookname;
        this.status = status;
        this.data = data;
        this.count = count;
    }
    public String getBookname() {
        return bookname;
    }

    public void setBookname(String bookname) {
        this.bookname = bookname;
    }

    public int getStatus() {
        return status;
    }

    public void setStatus(int status) {
        this.status = status;
    }

    public String getData() {
        return data;
    }

    public void setData(String data) {
        this.data = data;
    }

    public int getCount() {
        return count;
    }
//执行该方法，记录借出一次
    public void setCount() {
        this.count ++;
    }



}

2.书架类

import java.lang.reflect.Array;
import java.util.Arrays;

public class BookSet {
    //1.存放图书的数组2.最多存放多少本书3.目前有多少本
    private Book [] books;

    public Book[] getBooks() {
        return books;
    }

    public void setBooks(Book[] books) {
        this.books = books;
    }

    private final int Max_Book_NUM=50;
    private int bookNum;
//构造方法：给成员变量初始化

    public BookSet() {
        this.bookNum=0;
        books=new Book[Max_Book_NUM];
    }
  public void addBook (Book  newBook){
      System.out.println("**********");
        //确定将新书放哪个位置
        int i;
        for (i=0;i<books.length;i++){
            if (books[i]==null){
                books[i]=newBook;
                bookNum++;
                System.out.println("新增《"+newBook.getBookname()+"》成功！");
                break;
            }
        }
        if (i==Max_Book_NUM){
            System.out.println("新增图书失败，书架满了！");
        }
      System.out.println("******************************");
  }

    public int getBooknum() {
        return bookNum;
    }

    public void setBooknum(int booknum) {
        this.bookNum = booknum;
    }
    //排行榜的功能
    public  void  rankList(){
        //定义一个新的数组
        Book [] sortedBooks=new Book[Max_Book_NUM];
        //拷贝数组
        sortedBooks=Arrays.copyOf(books,Max_Book_NUM);
        //输出排序后的数组
        for(int i=0;i<bookNum;i++){
            int maxindex=i;
            for (int j=i+1;j<bookNum;j++){
                if (sortedBooks[j].getCount() > sortedBooks[maxindex].getCount()){
                    maxindex=j;
                }
            }
            if (maxindex!=i){
                Book tempbook;
                tempbook=sortedBooks[i];
                sortedBooks[i]=sortedBooks[maxindex];
                sortedBooks[maxindex]=tempbook;
            }
        }
        System.out.println("-----排行榜");
        System.out.println("********************************");
        System.out.println("次数\t名称");
        for (int i=0;i<bookNum;i++){
            System.out.println(sortedBooks[i].getCount()+"\t《"+sortedBooks[i].getBookname()+"》");

        }
        System.out.println("********************************");

    }

    //查看所有图书的信息
    public  void showAllBookInfo(){
        String zhuangt="未借出";
       String zhungt1="已借出";
        System.out.println("********************************************************************************************");
        System.out.println(" 状态\t\t\t 书名\t\t\t借出日期\t\t借出书籍数量\t\t未借出书籍数量");
        for (int i=0;i<bookNum;i++){
           int  s= books [i].getStatus();
           if (s==1) {
               System.out.println(zhuangt + "\t\t《" + books[i].getBookname() +
                       "》 \t\t" + zhuangt+ "\t\t\t\t" + books[i].getCount() + " \t\t\t\t\t" + ( Max_Book_NUM-books[i].getCount()));
           }
           else if (s==0){
               System.out.println(zhungt1 + "\t\t《" + books[i].getBookname() +
                       "》 \t\t" + books[i].getData() + "\t\t\t" + books[i].getCount() + " \t\t\t\t\t" + ( Max_Book_NUM-books[i].getCount()));
           }

        }
        System.out.println("********************************************************************************************");

    }
}
3.管理员类


import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Scanner;

public class BookSetManger {
    //管理书架费用
    private int charge;
    private BookSet bookSet;
    private  String lendtime="";
    private  String returntime="";
    private String wantbookname="";
    public  BookSetManger(){
    bookSet=new BookSet();
    setCharge(0);
}
//初始化系统里的书
 public void    init(){
    bookSet.addBook(new Book("数据结构",1,"null",5));
     bookSet.addBook(new Book(" 运筹学 ",1,null,2));
     bookSet.addBook(new Book("高等数学",1,null,8));
     bookSet.addBook(new Book("离散数学",1,null,10));
     bookSet.addBook(new Book("计算机基础",1,null,1));
     bookSet.addBook(new Book("机器学习",1,null,6));
     bookSet.addBook(new Book(" 数据库 ",1,null,2));
 }
 //主界面
 public void  startMenu(){
     System.out.println(" \t欢迎使用热门图书借阅系统");
     System.out.println("-----------------------------------------\n");
     System.out.print("1.热门书排行榜  \t");
     System.out.println(" 2.查询全部图书");
     System.out.print("3.新增图书信息  \t");
     System.out.println(" 4.删除图书信息\t");
     System.out.print("5.借出图书  \t\t");
     System.out.println(" 6.归还图书\t\t");
     System.out.print("7.费用统计\t\t");
     System.out.println("\t 0.退    出");
     System.out.println("-----------------------------------------\n");
     System.out.println("请选择：");
     Scanner scanner=new Scanner(System.in);
     String chose=scanner.next();
     switch (chose){
         case "1": bookSet.rankList();break;
         case "2":  bookSet.showAllBookInfo();    break;
         case "3":{
             //输入名字
             String bookName=inputBookname();
             //实例化对象放到书架中
             bookSet.addBook(new Book(bookName,1,null,0));
         }
             break;
         case "4":  DelBook();    break;
         case "5":  lendBook();    break;
         case "6":   ReturnBook();  break;
         case "7":   CostCt();   break;
         case "0":    {
             System.out.println("感谢使用，系统退出");
             System.exit(0);
         }
         default:    System.out.println("输入有误，我看不懂");
     }
     returnStartmenu();

 }
 //返回主菜单
    public  void returnStartmenu(){
        System.out.println("请按回车键返回主菜单");
        Scanner scanner=new Scanner(System.in);
        scanner.nextLine();
        startMenu();
    }
    //借书
    public String lendBook(){
        System.out.println("-------->借出图书");
       String wantBn= inputBookname();//读者想要看的书名\
        Boolean exist=false;//读者要看的书不存在
        for (int i=0;i<bookSet.getBooknum();i++){
            Book currentBook=bookSet.getBooks()[i];//从书架上按顺序拿一本书
            String name=currentBook.getBookname().replace(" ","");
            if (name.equals(wantBn)&&currentBook.getStatus()==1){
                exist=true;
                currentBook.setStatus(0);
                lendtime=inputdate("借书");
                System.out.println("借书费用两元一天");
                currentBook.setData(lendtime);
                currentBook.setCount();
                System.out.println("恭喜你,《"+wantBn+"》借出成功！");
                break;
            }
            else if (name.equals(wantBn)&&currentBook.getStatus()==0){
                exist=true;
                System.out.println("Scorry,《"+wantBn+"》已借出！");
            }
        }
        if (exist==false){
            System.out.println("没有找到你想借的书！");
            System.out.println("请重新输入：");

        }
     return  wantbookname=wantBn;
    }
    //还书
    public  String  ReturnBook(){
        System.out.println("归还图书 >>>");
        System.out.println("*******************************\n");
        String wantlend=inputBookname();
        String warn="恭喜，《"+wantlend+"》还书成功";
        Boolean zhuangT=false;//要还的书不存在
        for (int i=0;i<bookSet.getBooknum();i++){
            Book book=bookSet.getBooks()[i];
            String bookname=book.getBookname().replace(" ","");
            if (book.getStatus()==0&&bookname.equals(wantlend)){
                returntime=inputdate("还书");
                zhuangT=true;
                book.setStatus(1);
                book.setCount();//加一本书
                System.out.println(warn);
                break;
            }
            else if (book.getStatus()==1&&bookname.equals(wantlend)){
                zhuangT=true;
                System.out.println("搞错了把，《"+wantlend+"》这本书还没借出去");
                break;
            }

        }
        if (zhuangT==false){
            System.out.println("丫丫哎呀,没有！！");
        }
        System.out.println("*******************************\n");

        return returntime;


    }
    //费用统计
    public  void CostCt(){

try {
    System.out.println("----------->费用统计");
    System.out.println("********************************************");
    SimpleDateFormat format=new  SimpleDateFormat("yyyyMMdd");
    Date enddate=format.parse(returntime);
    Date startDate=format.parse(lendtime);
    long totalPrice = ((enddate.getTime()-startDate.getTime())/(24*60*60*1000))*2;
    for (int i=0;i<bookSet.getBooknum();i++){
        Book book=bookSet.getBooks()[i];
        String bookname=book.getBookname().replace(" ","");
              if (bookname.equals(wantbookname)) {
                  System.out.println("书名\t" + "借书时间\t" + "还书时间\t" + "总时长");
                  System.out.println(bookname + "\t"
                          + lendtime + "\t" + returntime + "\t"
                          + ((enddate.getTime() - startDate.getTime())/ (24 * 60 * 60 * 1000))+"天");
              }
    }

    System.out.println("您的借书费用为：" + totalPrice+"元");
}
catch (Exception e){
    System.out.println("系统检测到你还没借书并还书，请检查并重试！");
    }


    }
    //删除图书

    public  void DelBook(){
        System.out.println("---------->删除图书");
        System.out.println("**************************************\n");
        String wantbn=inputBookname();
        Book [] b=new Book[bookSet.getBooknum()];
        Boolean cunz=false;//不存在
        for (int i=0;i<bookSet.getBooknum();i++){
            Book book=bookSet.getBooks()[i];
            String bookname=book.getBookname().replace(" ","");
                if (book.getStatus()==1&&bookname.equals(wantbn)){
                    int index=i;
                    cunz=true;
                    //最后那本书代替要删除的书
                    b[index]=b[b.length-1];
                    //从书架剪掉一本书
                    bookSet.setBooknum(bookSet.getBooknum()-1);
                    System.out.println("《"+bookname+"》删除成功！！");
                    break;
                }
                else if (book.getStatus()==0&&bookname.equals(wantbn)){
                    cunz=true;
                    System.out.println("《"+book.getBookname()+"》借出去了，不能删除");
                    break;
                }

        }
        if (cunz==false){
            System.out.println("能不能长点心，这书这里没有");
        }
        System.out.println();
        System.out.println("**************************************");
        returnStartmenu();

    }
    //输入日期
    public  String  inputdate(String info){
        System.out.println("请输入"+info+"日期<yyyymmdd>:");
        Scanner scanner=new Scanner(System.in);
        String date=scanner.next();
        return date;
    }

 //输入书名
  public  String  inputBookname (){
      System.out.print(">>请输入书名>>");
      Scanner scanner=new Scanner(System.in);
     String bookname= scanner.next();
     String newbookname=bookname.replace(" ","");
     return newbookname;
  }
    public int getCharge() {
        return charge;
    }

    public void setCharge(int charge) {
        this.charge = charge;
    }



}

4.测试

public class Starter {
    public static void main(String[] args) {
        BookSetManger bsm=new BookSetManger();
        bsm.init();
        bsm.startMenu();

    }
}

java--模拟图书管理系统

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