Java 图书馆库存管理系统（附加用户购买结账系统）

小咪咪 2022-09-25 11:21 201阅读 0赞

01.package Library;   
    02.  
    03.import java.io.Serializable;  
    04.  
    05.public class Book implements Serializable{  
    06.  
    07.    private int bookId;  
    08.    private String bookName;  
    09.    private String auther;  
    10.    private String pubDate;  
    11.    private double price;  
    12.    private int store;  
    13.    public int getBookId() {  
    14.        return bookId;  
    15.    }  
    16.    public void setBookId(int bookId) {  
    17.        this.bookId = bookId;  
    18.    }  
    19.    public String getBookName() {  
    20.        return bookName;  
    21.    }  
    22.    public void setBookName(String bookName) {  
    23.        this.bookName = bookName;  
    24.    }  
    25.    public String getAuther() {  
    26.        return auther;  
    27.    }  
    28.    public void setAuther(String auther) {  
    29.        this.auther = auther;  
    30.    }  
    31.    public String getPubDate() {  
    32.        return pubDate;  
    33.    }  
    34.    public void setPubDate(String pubDate) {  
    35.        this.pubDate = pubDate;  
    36.    }  
    37.    public double getPrice() {  
    38.        return price;  
    39.    }  
    40.    public void setPrice(double price) {  
    41.        this.price = price;  
    42.    }  
    43.    public int getStore() {  
    44.        return store;  
    45.    }  
    46.    public void setStore(int store) {  
    47.        this.store = store;  
    48.    }  
    49.    public Book(int bookId, String bookName, String auther, String pubDate,  
    50.            double price, int store) {  
    51.        super();  
    52.        this.bookId = bookId;  
    53.        this.bookName = bookName;  
    54.        this.auther = auther;  
    55.        this.pubDate = pubDate;  
    56.        this.price = price;  
    57.        this.store = store;  
    58.    }  
    59.    public Book() {  
    60.        // TODO Auto-generated constructor stub  
    61.    }  
    62.      
    63.  
    64.}</strong></span><span style="font-size:18px;font-weight: bold;">  
    65.</span>

01.package Library;  
    02.  
    03.import java.io.FileInputStream;  
    04.import java.io.FileNotFoundException;  
    05.import java.io.FileOutputStream;  
    06.import java.io.IOException;  
    07.import java.io.ObjectInputStream;  
    08.import java.io.ObjectOutputStream;  
    09.import java.util.ArrayList;  
    10.import java.util.List;  
    11.  
    12.public class BookBiz {  
    13.    private List<Book> bookList =new ArrayList<Book>();  
    14.      
    15.    public BookBiz(){  
    16.        readFile();  
    17.        if(bookList.size()==0){  
    18.            Book book=new Book(10001,"鬼吹灯","天下霸唱","2006-1-1",34,3);  
    19.            insertBook(book);  
    20.             book=new Book(10002,"魔戒","莫尔斯","2006-3-1",334,300);  
    21.            insertBook(book);  
    22.             book=new Book(10003,"哈利波特","罗琳","2006-1-1",34,3);  
    23.            insertBook(book);  
    24.             book=new Book(10004,"时间机器人","威尔","2006-3-1",90,30);  
    25.            insertBook(book);  
    26.             book=new Book(10005,"宇宙奥秘","霍金","2006-1-1",89,79);  
    27.            insertBook(book);  
    28.        }  
    29.    }  
    30.      
    31.    public void insertBook(Book book){  
    32.        bookList.add(book);  
    33.        saveFile();  
    34.    }  
    35.    public void deleteBook(int id){  
    36.        for(int i=0;i<bookList.size();i++){  
    37.            Book book =bookList.get(i);  
    38.            if(book.getBookId()==1){  
    39.                bookList.remove(i);  
    40.                saveFile();  
    41.                return;  
    42.            }  
    43.        }  
    44.    }  
    45.    public void updateBook(Book book){  
    46.        for(int i=0;i<bookList.size();i++){  
    47.            Book bk=bookList.get(i);  
    48.            if(bk.getBookId()==book.getBookId()){  
    49.                bk.setAuther(book.getAuther());  
    50.                bk.setBookId(book.getBookId());  
    51.                bk.setPrice(book.getPrice());  
    52.                bk.setStore(book.getStore());  
    53.                bk.setPubDate(book.getPubDate());  
    54.                saveFile();  
    55.                return;  
    56.                  
    57.            }  
    58.        }  
    59.    }  
    60.    public List<Book> selectBooks(){  
    61.          
    62.        return bookList;      
    63.    }  
    64.    public Book selectBook(int id ){  
    65.          
    66.        Book book=new Book();  
    67.        for (int i = 0; i < bookList.size(); i++) {  
    68.            book=bookList.get(i);  
    69.            if(book.getBookId()==id){  
    70.                return book;  
    71.            }  
    72.        }  
    73.        return null;  
    74.    }  
    75.public Book selectBook2(int id,int store ){  
    76.          
    77.        Book book=new Book();  
    78.        for (int i = 0; i < bookList.size(); i++) {  
    79.            book=bookList.get(i);  
    80.            if(book.getBookId()==id){  
    81.                int st=book.getStore()-store;  
    82.                book.setStore(st);  
    83.                return book;  
    84.            }  
    85.        }  
    86.        return null;  
    87.    }  
    88.public void readFile(){  
    89.    ObjectInputStream ois=null;  
    90.    FileInputStream fis=null;  
    91.    String name="E:\\Android\\workspace\\MyOopBook\\src\\book.txt";  
    92.        try {fis=new FileInputStream(name);  
    93.        ois=new ObjectInputStream(fis);   
    94.        bookList=(List<Book>) ois.readObject();         
    95.}catch (FileNotFoundException e) {  
    96.    // TODO Auto-generated catch block  
    97.    e.printStackTrace();  
    98.} catch (IOException e) {  
    99.    // TODO Auto-generated catch block  
    100.    e.printStackTrace();  
    101.} catch (ClassNotFoundException e) {  
    102.    // TODO Auto-generated catch block  
    103.    e.printStackTrace();  
    104.}  
    105.finally{  
    106.    try {  
    107.        if(ois!=null){  
    108.            ois.close();  
    109.        }  
    110.    } catch (IOException e) {  
    111.        // TODO: handle exception  
    112.        e.printStackTrace();  
    113.    }  
    114.}  
    115.}  
    116.public void saveFile(){  
    117.    ObjectOutputStream oos=null;  
    118.    FileOutputStream fos=null;  
    119.    String name="E:\\Android\\workspace\\MyOopBook\\src\\book.txt";  
    120.    try {fos=new FileOutputStream(name);  
    121.    oos=new ObjectOutputStream(fos);  
    122.    oos.writeObject(bookList);  
    123.    } catch (FileNotFoundException e) {  
    124.        // TODO Auto-generated catch block  
    125.        e.printStackTrace();  
    126.    } catch (IOException e) {  
    127.        // TODO Auto-generated catch block  
    128.        e.printStackTrace();  
    129.    }finally{  
    130.        try {  
    131.            if(oos!=null){  
    132.                oos.close();  
    133.            }  
    134.        } catch (IOException e) {  
    135.            // TODO: handle exception  
    136.            e.printStackTrace();  
    137.        }  
    138.    }  .  
    139.  }     
    140.}

01.package Library;  
    02.import java.util.List;  
    03.import java.util.Scanner;  
    04.  
    05.  
    06.  
    07.public class BookTest {  
    08.  
    09.    /** 
    10.     * @param args 
    11.     */  
    12.    private BookBiz bookbiz=new BookBiz();  
    13.    public static void main(String[] args) {  
    14.        // TODO Auto-generated method stub  
    15.       Scanner input=new Scanner(System.in);  
    16.       System.out.println("欢迎使用图书书店");  
    17.       System.out.println("请输入用户名");  
    18.       String userName=input.next();  
    19.       System.out.println("请输入密码");  
    20.        String userPwd=input.next();  
    21.          
    22.        BookTest bt=new BookTest();  
    23.        if(userName.equals("admin")&&userPwd.equals("123")){  
    24.            System.out.println("登陆成功");  
    25.            bt.showMainView();  
    26.            bt.adminOption();  
    27.        }else if(userName.equals("user")&&userPwd.equals("123")){  
    28.            System.out.println("登陆成功");  
    29.            bt.showuser();  
    30.            bt.adminOptionuser();  
    31.        }  
    32.        else{  
    33.            System.out.println("账号密码有错误");  
    34.        }  
    35.    }     
    36.      
    37.public void showMainView(){  
    38.    System.out.println("============欢迎登陆库存管理系统===========");  
    39.    System.out.println("书号\t\t书名\t\t作者\t\t日期\t\t价格\t\t数量\t\t");  
    40.    List<Book> list=bookbiz.selectBooks();  
    41.    for (Book book : list) {  
    42.        System.out.print(book.getBookId()+"\t\t");  
    43.        System.out.print(book.getBookName()+"\t\t");  
    44.        System.out.print(book.getAuther()+"\t\t");  
    45.        System.out.print(book.getPubDate()+"\t");  
    46.        System.out.print(book.getPrice()+"\t\t");  
    47.        System.out.print(book.getStore()+"\n");  
    48.    }  
    49.    System.out.println("请选择进行的操作：1.图书入库2.图书出库3.查询全部图书4.新增图书5.退出");  
    50.      
    51.    }  
    52.  
    53.public void showuser(){  
    54.    System.out.println("************欢迎光临图书系统*************");  
    55.    System.out.println("书号\t\t书名\t\t作者\t\t日期\t\t价格\t\t数量\t\t");  
    56.    List<Book> list=bookbiz.selectBooks();  
    57.    for (Book book : list) {  
    58.        System.out.print(book.getBookId()+"\t\t");  
    59.        System.out.print(book.getBookName()+"\t\t");  
    60.        System.out.print(book.getAuther()+"\t\t");  
    61.        System.out.print(book.getPubDate()+"\t");  
    62.        System.out.print(book.getPrice()+"\t\t");  
    63.        System.out.print(book.getStore()+"\n");  
    64.    }  
    65.    System.out.println("请选择进行的操作：1.查询全部图书2结账3.退出");  
    66.      
    67.    }  
    68.  
    69.public void adminOptionuser(){  
    70.     Scanner input=new Scanner(System.in);  
    71.     int  which=input.nextInt();  
    72.     switch(which){  
    73.     case 1:  showuser();   
    74.     adminOptionuser();               //1.查询全部图书  
    75.         break;  
    76.     case 2:  jiezhang();  
    77.     adminOptionuser();                //2结账  
    78.         break;  
    79.        default:   
    80.            System.out.println("谢谢使用");//3退出  
    81.            break;  
    82.        }  
    83.       
    84.     }  
    85.  
    86.public void adminOption(){  
    87.     Scanner input=new Scanner(System.in);  
    88.     int  which=input.nextInt();  
    89.     switch(which){  
    90.     case 1:  tushuruku();      //1.图书入库  
    91.         break;  
    92.     case 2:  tushuchuku();      //2.图书出库  
    93.         break;  
    94.     case 3:          //3查询全部图书  
    95.     { showMainView();  
    96.         adminOption();}  
    97.         break;  
    98.     case 4:    insertbook();      //4.新增图书  
    99.         break;  
    100.           
    101.        default:   
    102.            System.out.println("谢谢使用");//5退出  
    103.            break;  
    104.        }  
    105.       
    106.     }  
    107.public void tushuruku(){  
    108.      
    109.    System.out.println("请输入图书信息");  
    110.    System.out.println("请输入图书ID：");  
    111.     Scanner input=new Scanner(System.in);  
    112.     int  id=input.nextInt();  
    113.     Book book=bookbiz.selectBook(id);  
    114.     System.out.println("请输入入库库存数量：");  
    115.     int  store=input.nextInt();  
    116.    store+=book.getStore();  
    117.     book.setStore(store);  
    118.     bookbiz.saveFile();  
    119.    // bookbiz.readFile(); 一开始用第一次用读  
    120.     showMainView();  
    121.     adminOption();  
    122.}  
    123.public void tushuchuku(){  
    124.      
    125.    System.out.println("请输入图书信息");  
    126.    System.out.println("请输入图书ID：");  
    127.     Scanner input=new Scanner(System.in);  
    128.     int  id=input.nextInt();  
    129.     System.out.println("请输入出库库存数量：");  
    130.     int  store=input.nextInt();  
    131.     bookbiz.selectBook2(id,store);  
    132.     bookbiz.saveFile();  
    133.    // bookbiz.readFile(); 一开始用第一次用读  
    134.     showMainView();  
    135.     adminOption();  
    136.}  
    137.  
    138.private void insertbook() {  
    139.    // TODO Auto-generated method stub  
    140.    Scanner a=new Scanner(System.in);  
    141.    System.out.println("请输入增加图书信息");  
    142.    System.out.println("请输入图书ID");  
    143.    int m=a.nextInt();  
    144.    System.out.println("请输入书名");  
    145.    String e=a.next();  
    146.    System.out.println("请输入作者");  
    147.    String t=a.next();  
    148.    System.out.println("请输入日期");  
    149.    String y=a.next();  
    150.    System.out.println("请输入价格");  
    151.    double p=a.nextInt();  
    152.    System.out.println("请输入库存");  
    153.    int u=a.nextInt();  
    154.    Book c=new Book(m,e,t,y,p,u);  
    155.    bookbiz.insertBook(c);  
    156.     showMainView();  
    157.     adminOption();  
    158.      
    159.}  
    160.  
    161.public void jiezhang(){  
    162.    System.out.println("请输入欲购买的图书信息：");  
    163.    System.out.println("请输入图书Id：");  
    164.     Scanner input=new Scanner(System.in);  
    165.     int  id=input.nextInt();  
    166.    System.out.println("请输入购买数量");  
    167.     int  store=input.nextInt();  
    168.     bookbiz.selectBook2(id,store);  
    169.     bookbiz.saveFile();  
    170.     Book book=bookbiz.selectBook(id);  
    171.     System.out.println(book.getBookName()+":"+book.getPrice());  
    172.    System.out.println("数量："+store);  
    173.    System.out.println("小计："+(store*book.getPrice()));  
    174.    showuser();  
    175.}   
    176.}

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**图书馆用户购买系统:**

01.package biz;  
    02.import java.io.Serializable;  
    03.public class Book implements Serializable {  
    04.    private int bookId;  
    05.    private String bookName;  
    06.    private String author;  
    07.    private String pubDate;  
    08.    private double price;  
    09.    private int   store;  
    10.    public Book(){}  
    11.    public Book(int bookId, String bookName, String author, String pubDate,  
    12.            double price, int store) {  
    13.        super();  
    14.        this.bookId = bookId;  
    15.        this.bookName = bookName;  
    16.        this.author = author;  
    17.        this.pubDate = pubDate;  
    18.        this.price = price;  
    19.        this.store = store;  
    20.    }  
    21.      
    22.      
    23.    public int getBookId() {  
    24.        return bookId;  
    25.    }  
    26.    public void setBookId(int bookId) {  
    27.        this.bookId = bookId;  
    28.    }  
    29.    public String getBookName() {  
    30.        return bookName;  
    31.    }  
    32.    public void setBookName(String bookName) {  
    33.        this.bookName = bookName;  
    34.    }  
    35.    public String getAuthor() {  
    36.        return author;  
    37.    }  
    38.    public void setAuthor(String author) {  
    39.        this.author = author;  
    40.    }  
    41.    public String getPubDate() {  
    42.        return pubDate;  
    43.    }  
    44.    public void setPubDate(String pubDate) {  
    45.        this.pubDate = pubDate;  
    46.    }  
    47.    public double getPrice() {  
    48.        return price;  
    49.    }  
    50.    public void setPrice(double price) {  
    51.        this.price = price;  
    52.    }  
    53.    public int getStore() {  
    54.        return store;  
    55.    }  
    56.    public void setStore(int store) {  
    57.        this.store = store;  
    58.    }        
    59.}

01.package biz;  
    02.  
    03.import java.io.FileInputStream;  
    04.import java.io.FileNotFoundException;  
    05.import java.io.FileOutputStream;  
    06.import java.io.IOException;  
    07.import java.io.ObjectInputStream;  
    08.import java.io.ObjectOutputStream;  
    09.import java.util.ArrayList;  
    10.import java.util.List;  
    11.  
    12.  
    13.public class BookBiz {  
    14.   private List<Book> bookList = new ArrayList<Book>();  
    15.   public BookBiz(){  
    16.       readFile();  
    17.       if(bookList.size()==0){  
    18.           Book book = new Book(10001,"鬼吹灯","天下霸唱","2006-01-01",87,100);  
    19.           insertBook(book);  
    20.           book = new Book(10002,"魔戒","莫尔斯","2006-01-01",22,55);  
    21.           insertBook(book);  
    22.           book = new Book(10003,"哈利波特","罗琳","2008-01-01",45,25);  
    23.           insertBook(book);  
    24.           book = new Book(10004,"时间机器","威尔","2009-01-01",66,64);  
    25.           insertBook(book);  
    26.           book = new Book(10005,"宇宙奥秘","霍金","2010-01-01",76,67);  
    27.           insertBook(book);  
    28.       }  
    29.   }  
    30.   public void insertBook(Book book){  
    31.       bookList.add(book);  
    32.       saveFile();  
    33.   }  
    34.   public void deleteBook(int id){  
    35.       for(int i= 0 ; i<bookList.size(); i++){  
    36.           Book book = bookList.get(i);  
    37.           if(book.getBookId() == id){  
    38.               bookList.remove(i);  
    39.               saveFile();  
    40.               return;  
    41.           }  
    42.       }  
    43.   }  
    44.   public void updateBook(Book book){  
    45.       for(int i=0 ; i < bookList.size();i++){  
    46.            Book bk = bookList.get(i);  
    47.            if(bk.getBookId() == book.getBookId()){  
    48.                bk.setAuthor(book.getAuthor());  
    49.                bk.setBookName(book.getBookName());  
    50.                bk.setPrice(book.getPrice());  
    51.                bk.setStore(book.getStore());  
    52.                bk.setPubDate(book.getPubDate());  
    53.                saveFile();  
    54.                return;  
    55.            }  
    56.       }  
    57.   }  
    58.   public List<Book> selectBooks(){  
    59.       return bookList;  
    60.   }  
    61.   public Book selectBook(int id){  
    62.       Book book = new Book();  
    63.       for(int i =0;i<bookList.size();i++){  
    64.           book = bookList.get(i);  
    65.           if(book.getBookId() == id){  
    66.               return book;  
    67.           }  
    68.       }  
    69.       return null;  
    70.   }  
    71.   public void readFile(){  
    72.       ObjectInputStream ois = null;  
    73.       FileInputStream   fis = null;  
    74.       String name = "E:\\Android\\workspace\\MyOopBookTeacher\\src\\biz\\book.txt";  
    75.       try {  
    76.          fis = new FileInputStream(name);  
    77.          ois = new ObjectInputStream(fis);  
    78.          bookList = (List<Book>) ois.readObject();  
    79.        } catch (FileNotFoundException e) {  
    80.            // TODO Auto-generated catch block  
    81.            e.printStackTrace();  
    82.        } catch (IOException e) {  
    83.            // TODO Auto-generated catch block  
    84.            e.printStackTrace();  
    85.        } catch (ClassNotFoundException e) {  
    86.            // TODO Auto-generated catch block  
    87.            e.printStackTrace();  
    88.        } finally{  
    89.            try {  
    90.                if(ois!=null){  
    91.                    ois.close();  
    92.                }  
    93.            } catch (IOException e) {  
    94.                // TODO Auto-generated catch block  
    95.                e.printStackTrace();  
    96.            }  
    97.        }  
    98.   }  
    99.   public void saveFile(){  
    100.         ObjectOutputStream oos = null;  
    101.         FileOutputStream  fos  = null;  
    102.         String name = "E:\\Android\\workspace\\MyOopBookTeacher\\src\\biz\\book.txt";  
    103.         try {  
    104.            fos = new FileOutputStream(name);  
    105.            oos = new ObjectOutputStream(fos);  
    106.            oos.writeObject(bookList);  
    107.            System.out.println("数据保存成功");  
    108.        } catch (FileNotFoundException e) {  
    109.            // TODO Auto-generated catch block  
    110.            e.printStackTrace();  
    111.        } catch (IOException e) {  
    112.            // TODO Auto-generated catch block  
    113.            e.printStackTrace();  
    114.        } finally{  
    115.            try {  
    116.                if(oos!=null){  
    117.                    oos.close();  
    118.                }  
    119.            } catch (IOException e) {  
    120.                // TODO Auto-generated catch block  
    121.                e.printStackTrace();  
    122.            }  
    123.        }  
    124.   }  
    125. }

01.package biz;  
    02.import java.util.HashMap;  
    03.import java.util.Iterator;  
    04.import java.util.List;  
    05.import java.util.Map;  
    06.import java.util.Scanner;  
    07.import java.util.Set;  
    08.  
    09.  
    10.  
    11.public class BookTest {  
    12.    private BookBiz bookbiz = new BookBiz();  
    13.    public static void main(String[] args) {  
    14.        Scanner input = new Scanner(System.in);  
    15.        System.out.println("欢迎使用图书书店");  
    16.        System.out.println("请输入用户名:");  
    17.        String userName = input.next();  
    18.        System.out.println("请输入密码:");  
    19.        String userPwd  = input.next();  
    20.        BookTest bt = new BookTest();  
    21.        if(userName.equals("admin")&&userPwd.equals("123")){  
    22.            System.out.println("登陆成功");  
    23.            bt.showMainView("admin");  
    24.            bt.adminOption();  
    25.        }else if(userName.equals("user")&&userPwd.equals("user")){  
    26.            System.out.println("登陆成功");  
    27.            bt.showMainView("user");  
    28.            bt.userOption();  
    29.        }  
    30.        else{  
    31.            System.out.println("用户或密码");  
    32.        }  
    33.    }  
    34.    public void showMainView(String arg){  
    35.        System.out.println("==================欢迎登录库存管理系统===================");  
    36.        System.out.println("书号\t\t书名\t\t作者\t\t发布日期\t\t价格\t\t库存");  
    37.        List<Book> list = bookbiz.selectBooks();  
    38.        for (Book book : list) {  
    39.            System.out.print(book.getBookId()+"\t\t");  
    40.            System.out.print(book.getBookName()+"\t\t");  
    41.            System.out.print(book.getAuthor()+"\t\t");  
    42.            System.out.print(book.getPubDate()+"\t\t");  
    43.            System.out.print(book.getPrice()+"\t\t");  
    44.            System.out.print(book.getStore()+"\n");  
    45.        }  
    46.        if(arg.equals("admin")){  
    47.            System.out.println("请选择进行的操作:1.图书入库 2.图书出库 " +  
    48.            "3.查询全部图书 4.新增图书 5.退出");  
    49.        }else{  
    50.            System.out.println("请选择进行的操作:1.查询 2.结账 3.退出");  
    51.        }  
    52.          
    53.    }  
    54.    public void adminOption(){  
    55.        Scanner input = new Scanner(System.in);  
    56.        int which = input.nextInt();  
    57.        switch(which){  
    58.             case  1: //入库  
    59.                 inStore();  
    60.                 break;  
    61.             case  2: //出库  
    62.                 outStore();  
    63.                 break;  
    64.             case  3: //查询全部  
    65.                 showMainView("admin");  
    66.                 break;  
    67.             case  4: //新增图书  
    68.                 addBook();  
    69.                 break;  
    70.             default: //退出  
    71.                 bookbiz.saveFile();  
    72.                 break;  
    73.        }  
    74.    }  
    75.    public void inStore(){  
    76.        Scanner input = new Scanner(System.in);  
    77.        System.out.println("请输入图书信息");  
    78.        System.out.println("请输入图书ID:");  
    79.        int bookId = input.nextInt();  
    80.        Book  book = bookbiz.selectBook(bookId);  
    81.        System.out.println("请输入入库的数量");  
    82.        int qty = input.nextInt();  
    83.        qty += book.getStore();  
    84.        book.setStore(qty);  
    85.        bookbiz.saveFile();  
    86.        showMainView("admin");  
    87.        adminOption();  
    88.    }  
    89.    public void outStore(){  
    90.        Scanner input = new Scanner(System.in);  
    91.        System.out.println("请输入图书信息");  
    92.        System.out.println("请输入图书ID:");  
    93.        int bookId = input.nextInt();  
    94.        Book  book = bookbiz.selectBook(bookId);  
    95.        System.out.println("请输入出库的数量");  
    96.        int qty = input.nextInt();  
    97.        book.setStore(book.getStore()-qty);  
    98.        bookbiz.saveFile();  
    99.        showMainView("admin");  
    100.        adminOption();  
    101.    }  
    102.    public void addBook(){  
    103.        Scanner input = new Scanner(System.in);  
    104.        System.out.println("请输入图书信息");  
    105.        System.out.println("请输入图书ID:");  
    106.        int bookId = input.nextInt();  
    107.        System.out.println("请输入书名");  
    108.        String bookName = input.next();  
    109.        System.out.println("请输入作者");  
    110.        String author = input.next();  
    111.        System.out.println("请输入出版时间");  
    112.        String pubDate = input.next();  
    113.        System.out.println("请输入价格");  
    114.        double price = input.nextDouble();  
    115.        System.out.println("请输入数量");  
    116.        int qty = input.nextInt();  
    117.        Book book = new Book();  
    118.        book.setBookId(bookId);  
    119.        book.setBookName(bookName);  
    120.        book.setAuthor(author);  
    121.        book.setPubDate(pubDate);  
    122.        book.setPrice(price);  
    123.        book.setStore(qty);  
    124.        bookbiz.insertBook(book);  
    125.        showMainView("admin");  
    126.        adminOption();  
    127.    }  
    128.      
    129.    public void userOption(){  
    130.        Scanner input = new Scanner(System.in);  
    131.        int which = input.nextInt();  
    132.        switch(which){  
    133.        case 1:  
    134.            break;  
    135.        case 2:  
    136.            pay();  
    137.            break;  
    138.        default:  
    139.            break;  
    140.        }  
    141.    }  
    142.    public void pay(){  
    143.        Scanner input = new Scanner(System.in);  
    144.        boolean flag = true;  
    145.        double amt = 0;  
    146.        Map map = new HashMap();  
    147.        do{  
    148.            System.out.println("请输入要购买的图书编号:");  
    149.            int bookId = input.nextInt();  
    150.            Book book = bookbiz.selectBook(bookId);  
    151.            System.out.println("请输入购买数量:");  
    152.            int count = input.nextInt();  
    153.            if(book.getStore()<count){  
    154.                System.out.println("购买数量过大,请重新输入");  
    155.                continue;  
    156.            }  
    157.            if(map.containsKey(book)){  
    158.                int temp = Integer.parseInt(map.get(book).toString());  
    159.                map.put(book, count+temp);  
    160.            }else{  
    161.                map.put(book, count);  
    162.            }  
    163.              
    164.            System.out.println(book.getBookName()+":"+book.getPrice());  
    165.            System.out.println(count);  
    166.            System.out.println("小计:"+(count*book.getPrice()));  
    167.            amt += count*book.getPrice();  
    168.            System.out.println("是否继续购买(y/n)");  
    169.            String str = input.next();  
    170.            if(!str.equals("y")){  
    171.                flag = false;  
    172.            }  
    173.        }while(flag);  
    174.          
    175.        System.out.println("总计:"+amt);  
    176.        System.out.println("支付:");  
    177.        double pay = input.nextDouble();  
    178.        Set set = map.keySet();  
    179.        Iterator it = set.iterator();  
    180.          
    181.        while(it.hasNext()){  
    182.            System.out.println("AAAAA");  
    183.            Book book = (Book) it.next();  
    184.            book = bookbiz.selectBook(book.getBookId());  
    185.            int count = Integer.parseInt(map.get(book).toString());  
    186.            book.setStore(book.getStore()-count);  
    187.            bookbiz.saveFile();  
    188.        }  
    189.        System.out.println("找零:"+(pay-amt));  
    190.        showMainView("user");  
    191.        userOption();  
    192.          
    193.    }     
    194. }

![Center 5][]

![Center 6][]

![Center 7][]

[Center]: /images/20220718/11d5a9f0671944059370639c7e56feb2.png
[Center 1]: /images/20220718/f7af6e9dbe6e426da8833a686889639e.png
[Center 2]: /images/20220718/cf4e3e0642cd468f92bee6bead22f68b.png
[Center 3]: /images/20220718/11a1b4efaedd4e94a1bb7448ed1e4aa9.png
[Center 4]: /images/20220718/d2956bdfec60450882bd399d1ac0d90c.png
[Center 5]: /images/20220718/51f046e4f33c47c59bd73e4d9bc631bb.png
[Center 6]: /images/20220718/4bb2ba33c68b475aaaa1fabea6bd2dab.png
[Center 7]: /images/20220718/53e03c6bd18c4dd7b17f8c7f8fc86ea8.png