Java编写选购图书项目

public class Books {
    private String book_no;
    private String book_name;
    private String book_author;
    private String release_time;
    private double price;
    private int stock;

    public Books() {
        super();
    }

    public Books(String book_no, String book_name, String book_author,
            String release_time, double price, int stock) {
        super();
        this.book_no = book_no;
        this.book_name = book_name;
        this.book_author = book_author;
        this.release_time = release_time;
        this.price = price;
        this.stock = stock;
    }

    public int getStock() {
        return stock;
    }

    public void setStock(int stock) {
        this.stock = stock;
    }

    public String getBook_no() {
        return book_no;
    }

    public void setBook_no(String book_no) {
        this.book_no = book_no;
    }

    public String getBook_name() {
        return book_name;
    }

    public void setBook_name(String book_name) {
        this.book_name = book_name;
    }

    public String getBook_author() {
        return book_author;
    }

    public void setBook_author(String book_author) {
        this.book_author = book_author;
    }

    public String getRelease_time() {
        return release_time;
    }

    public void setRelease_time(String release_time) {
        this.release_time = release_time;
    }

    public double getPrice() {
        return price;
    }

    public void setPrice(double price) {
        this.price = price;
    }

public class BookManager {
    private Books[] books;
    private int ID = 10000;
    private double summoney;
    public BookManager() {
        super();
        books = new Books[30];
    }

    // 图书入库
    public void addBooks(String ID, int stock) {
        for (Books b : books) {
            if (b.getBook_no().equals(ID)) {
                b.setStock(b.getStock() + stock);
                break;
            }
        }
    }

    // 图书出库
    public void delivery(String ID, int stock) {
        for (Books b : books) {
            if (b.getBook_no().equals(ID)) {
                if (b.getStock() > stock) {
                    b.setStock(b.getStock() - stock);
                    break;
                }
            }
        }
    }

    // 查询全部图书
    public void showBooks() {
        if (books != null) {
            for (Books books2 : books) {
                if (books2 != null) {
                    System.out.println(books2.getBook_no() + "\t"
                            + books2.getBook_name() + "\t"
                            + books2.getBook_author() + "\t"
                            + books2.getRelease_time() + "\t"
                            + books2.getPrice() + "\t" + books2.getStock());
                }
            }
        } else {
            System.err.print("暂无库存!");
        }
    }

    // 新增图书
    public void increaseBook(Books books) {
        for (int i = 0; i < this.books.length; i++) {
            if (this.books[i] == null) {
                this.books[i] = books;
                break;
            }
        }
    }
    
    //自动添加图书编号
    public String returnNo() {
        if (books != null) {
            ID += 1;
            return String.valueOf(ID);
        } else {
            return "";
        }

    }
    
    // 结账
        public void account(String ID, int num) {
            for (Books books2 : books) {
                if (books2.getBook

public class Test {

    public static void main(String[] args) {
        System.out.println("***********欢迎使用图书书店**********");
        System.out.print("请输入用户名：");
        Scanner input = new Scanner(System.in);
        String name = input.next();
        System.out.println("请输入密码");
        String pwd = input.next();
        Admin admin = new Admin(name, pwd);
        boolean flag1 = admin.identity();
        User user = new User(name, pwd);
        boolean flag2 = user.identity();
        BookManager bookManager = new BookManager();
        if (flag1) {
            System.out.println("登录成功！");
            System.out.println();
            boolean flag = true;
            System.out.println("********欢迎登录库存管理系统*********");
            do {
                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");
                int num = input.nextInt();
                switch (num) {
                case 1:
                    System.out.print("请输入图书ID:");
                    String bookID = input.next();
                    System.out.print("请输入入库的数量");
                    int stock = input.nextInt();
                    bookManager.addBooks(bookID, stock);
                    System.out.print("书号\t书名\t作者\t发布时间\t价格\t库存\n");
                    bookManager.showBooks();
                    break;
                case 2:
                    System.out.print("请输入图书ID:");
                    String bookID1 = input.next();
                    System.out.print("请输入出库的数量");
                    int stock1 = input.nextInt();
                    bookManager.delivery(bookID1, stock1);
                    System.out.print("书号\t书名\t作者\t发布时间\t价格\t库存\n");
                    bookManager.showBooks();
                    break;
                case 3:
                    System.out.print("书号\t书名\t作者\t发布时间\t价格\t库存\n");
                    bookManager.showBooks();
                    break;
                case 4:
                    System.out.print("请输入书名：");
                    String authorName = input.next();
                    System.out.print("请输入作者名：");
                    String author = input.next();
                    System.out.print("请输入发布时间：");
                    String time = input.next();
                    System.out.print("请输入价格：");
                    double price = input.nextDouble();
                    System.out.println("请输入数量：");
                    int stock2 = input.nextInt();
                    Books book = new Books(bookManager.returnNo(), authorName,
                            author, time, price, stock2);
                    bookManager.increaseBook(book);
                    System.out.print("书号\t书名\t作者\t发布时间\t价格\t库存\n");
                    bookManager.showBooks();
                    break;
                default:
                    flag = false;
                    break;
                }

            } while (flag);
        }
        if (flag2) {
            System.out.println("登录成功！");
            Books books2 = new Books("10001", "鬼吹灯", "天下霸唱", "2008-7-1", 23, 87);
            Books books = new Books("10002", "魔戒1", "莫尔斯", "2005-3-14", 54, 13);
            bookManager.increaseBook(books);
            bookManager.increaseBook(books2);
            boolean flag = true;
            System.out.println("********欢迎光临图书馆系统*********");
            do {
                System.out.println("请选择进行的操作：1.查看图书 2.结账 3.退出");
                int num = input.nextInt();
                switch (num) {
                case 1:
                    System.out.print("书号\t书名\t作者\t发布时间\t价格\t库存\n");
                    bookManager.showBooks();
                    break;
                case 2:
                    System.out.print("请输入图书ID:");
                    String bookID1 = input.next();
                    System.out.print("请输入购买数量");
                    int buy_num = input.nextInt();
                    bookManager.account(bookID1, buy_num);
                    break;

                default:
                    flag = false;
                    break;
                }

            } while (flag);

        }

    }

}

_no().equals(ID)) {
                    summoney = books2.getPrice() * num;
                    System.out.print(books2.getBook_no()+":"+books2.getPrice()+"\n"+
                    "数量："+num+"\n小记："+summoney);
                    break;
                }
            }
        }

public class Admin {
    private String admin_name;
    private String admin_pwd;

    public Admin() {
        super();
    }

    public Admin(String admin_name, String admin_pwd) {
        super();
        this.admin_name = admin_name;
        this.admin_pwd = admin_pwd;
    }
    
    // 身份认证
        public boolean identity() {
            if (getAdmin_name().equals("admin") && getAdmin_pwd().equals("admin")) {
                return true;
            } else {
                return false;
            }
        }

    public String getAdmin_name() {
        return admin_name;
    }

    public void setAdmin_name(String admin_name) {
        this.admin_name = admin_name;
    }

    public String getAdmin_pwd() {
        return admin_pwd;
    }

    public void setAdmin_pwd(String admin_pwd) {
        this.admin_pwd = admin_pwd;
    }

}

public class User {
    private String user_name;
    private String user_pwd;
    
    Admin admin = new Admin();
    public User() {
        super();
    }

    public User(String user_name, String user_pwd) {
        super();
        this.user_name = user_name;
        this.user_pwd = user_pwd;
    }

    // 身份认证
    public boolean identity() {
        if (getUser_name().equals("user") && getUser_pwd().equals("user")) {
            return true;
        } else {
            return false;
        }
    }
    
    public String getUser_name() {
        return user_name;
    }

    public void setUser_name(String user_name) {
        this.user_name = user_name;
    }

    public String getUser_pwd() {
        return user_pwd;
    }

    public void setUser_pwd(String user_pwd) {
        this.user_pwd = user_pwd;
    }

}