Java图书管理系统实现

左手的ㄟ右手 2023-09-28 23:12 13阅读 0赞

> 今天来实现了一下Java的小项目：**图书管理系统**

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**文件：**

![在这里插入图片描述][1bfcc68c74e94b0c9eb49828ff448f50.png]

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**代码部分：**

**Book:**

package bookManagement.Book;
    
    public class Book {
        
        private String name;
        private String author;
        private double price;
        private String type;
        private boolean isBorrowed;
    
        public Book(String name, String author, double price, String type) {
        
            this.name = name;
            this.author = author;
            this.price = price;
            this.type = type;
            this.isBorrowed = false;
        }
    
        public String getName() {
        
            return name;
        }
    
        public void setName(String name) {
        
            this.name = name;
        }
    
        public String getAuthor() {
        
            return author;
        }
    
        public void setAuthor(String author) {
        
            this.author = author;
        }
    
        public double getPrice() {
        
            return price;
        }
    
        public void setPrice(double price) {
        
            this.price = price;
        }
    
        public String getType() {
        
            return type;
        }
    
        public void setType(String type) {
        
            this.type = type;
        }
    
        public boolean isBorrowed() {
        
            return isBorrowed;
        }
    
        public void setBorrowed(boolean borrowed) {
        
            isBorrowed = borrowed;
        }
    
        @Override
        public String toString() {
        
            return "Book{" +
                    "name='" + name + '\'' +
                    ", author='" + author + '\'' +
                    ", price=" + price +
                    ", type='" + type + '\'' +
                    ", isBorrowed=" + isBorrowed +
                    '}';
        }
    }

**bookList:**

package bookManagement.Book;
    
    import java.util.Iterator;
    import java.util.LinkedList;
    
    public class bookList {
        
        public static final LinkedList<Book> booksList = new LinkedList<>();
        public static final LinkedList<String> booksName = new LinkedList<>();
    
        static {
        
            booksList.add(new Book("水浒传", "施耐庵", 85.5, "小说"));
            booksList.add(new Book("三国演义", "罗贯中", 120.6, "小说"));
            booksList.add(new Book("红楼梦", "曹雪芹", 99.9, "小说"));
            booksList.add(new Book("西游记", "吴承恩", 66.6, "小说"));
    
            booksName.add("水浒传");
            booksName.add("三国演义");
            booksName.add("红楼梦");
            booksName.add("西游记");
        }
    
        public void addBook(Book book) {
        
            if (booksName.contains(book.getName())) {
        
                System.out.println("该书目已存在！");
                return;
            }
            booksList.add(book);
            booksName.add(book.getName());
        }
    
        public Book findBook(String bookName) {
        
            if (booksName.contains(bookName)) {
        
                Iterator<Book> iterator = booksList.iterator();
                while (iterator.hasNext()) {
        
                    Book book = iterator.next();
                    if (book.getName().equals(bookName)) {
        
                        return book;
                    }
                }
            } else {
        
                System.out.println("书架上没有该书目！");
            }
            return null;
        }
    
        public void deleteBook(String bookName) {
        
            if (booksName.contains(bookName)) {
        
                Iterator<Book> iterator = booksList.iterator();
                while (iterator.hasNext()) {
        
                    Book book = iterator.next();
                    if (book.getName().equals(bookName)) {
        
                        booksList.remove(book);
                        booksName.remove(bookName);
                        System.out.println("删除成功！");
                        return;
                    }
                }
            } else {
        
                System.out.println("删除失败！书架上没有该书目！");
            }
        }
    
        public void showBooks() {
        
            Iterator<Book> iterator = booksList.iterator();
            while (iterator.hasNext()) {
        
                Book book = iterator.next();
                System.out.println(book);
            }
        }
    
        public void borrowBook(String bookName) {
        
            Book book = findBook(bookName);
            if (booksName.contains(bookName)) {
        
                if (book.isBorrowed()) {
        
                    System.out.println("该书已被借出！");
                } else {
        
                    System.out.println("借书成功！！！");
                    book.setBorrowed(true);
                }
            } else {
        
                System.out.println("借阅失败！书架上没有该书目！");
            }
        }
    
        public void returnBook(String bookName) {
        
            Book book = findBook(bookName);
            if (book == null) {
        
                System.out.println("书架上没有该书");
            } else if (booksName.contains(bookName) && book.isBorrowed()) {
        
                System.out.println("还书成功！！！");
                book.setBorrowed(false);
            }
        }
    
        public void updateBook(String bookName, double price, String type) {
        
            Book book = findBook(bookName);
            if (book == null) {
        
                System.out.println("书架上没有该书！");
            } else {
        
                book.setPrice(price);
                book.setType(type);
                System.out.println("更新成功！");
            }
        }
    }

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**Operation:**

package bookManagement.Operation;
    
    import bookManagement.Book.bookList;
    
    public interface Operation {
        
        void operation(bookList booklist);
    }

**add:**

package bookManagement.Operation;
    
    import bookManagement.Book.Book;
    import bookManagement.Book.bookList;
    
    import java.util.Scanner;
    
    public class addOperation implements Operation {
        
        @Override
        public void operation(bookList booklist) {
        
            Scanner sc = new Scanner(System.in);
            System.out.println("请输入你需要添加的书的名称：");
            String name = sc.nextLine();
            System.out.println("请输入该书的作者：");
            String author = sc.nextLine();
            System.out.println("请输入该书的价格：");
            double price = sc.nextDouble();
            System.out.println("请输入该书的类型：");
            String type = sc.nextLine();
            Book book = new Book(name, author, price, type);
            booklist.addBook(book);
        }
    }

**borrow:**

package bookManagement.Operation;
    
    import bookManagement.Book.bookList;
    
    import java.util.Scanner;
    
    public class borrowOperation implements Operation {
        
        @Override
        public void operation(bookList booklist) {
        
            Scanner sc = new Scanner(System.in);
            System.out.println("请输入你要借阅的书名：");
            String name = sc.nextLine();
            booklist.borrowBook(name);
        }
    }

**delete:**

package bookManagement.Operation;
    
    import bookManagement.Book.bookList;
    
    import java.util.Scanner;
    
    public class deleteOperation implements Operation {
        
        @Override
        public void operation(bookList booklist) {
        
            Scanner sc = new Scanner(System.in);
            System.out.println("请输入你要删除的书名：");
            String name = sc.nextLine();
            booklist.deleteBook(name);
        }
    }

**find:**

package bookManagement.Operation;
    
    import bookManagement.Book.Book;
    import bookManagement.Book.bookList;
    
    import java.util.Scanner;
    
    public class findOperation implements Operation {
        
        @Override
        public void operation(bookList booklist) {
        
            Scanner sc = new Scanner(System.in);
            System.out.println("请输入你要查找的书名：");
            String name = sc.nextLine();
            Book book = booklist.findBook(name);
            System.out.println(book);
        }
    }

**return:**

package bookManagement.Operation;
    
    import bookManagement.Book.bookList;
    
    import java.util.Scanner;
    
    public class returnOperation implements Operation {
        
    
        @Override
        public void operation(bookList booklist) {
        
            Scanner sc = new Scanner(System.in);
            System.out.println("请输入你要归还的书名：");
            String name = sc.nextLine();
            booklist.returnBook(name);
        }
    }

**show:**

package bookManagement.Operation;
    
    import bookManagement.Book.bookList;
    
    public class showOperation implements Operation {
        
        @Override
        public void operation(bookList booklist) {
        
            booklist.showBooks();
        }
    }

**update:**

package bookManagement.Operation;
    
    import bookManagement.Book.bookList;
    
    import java.util.Scanner;
    
    public class updateOperation implements Operation {
        
        @Override
        public void operation(bookList booklist) {
        
            Scanner sc = new Scanner(System.in);
            System.out.println("请输入你需要更新的书的名称：");
            String name = sc.nextLine();
            System.out.println("请输入更新后的的价格：");
            double price = sc.nextDouble();
            System.out.println("请输入更新后的的类型：");
            String type = sc.nextLine();
            booklist.updateBook(name, price, type);
        }
    }

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**User:**

package bookManagement.User;
    
    import bookManagement.Book.bookList;
    import bookManagement.Operation.Operation;
    
    public abstract class User {
        
        protected String name;
        protected Operation[] operations;
    
        // 根据用户输入执行相应操作
        public abstract int menu();
    
        public void doOperation(int choice, bookList bookList) {
        
            operations[choice - 1].operation(bookList);
        }
    }

**AdminUser：**

package bookManagement.User;
    
    import bookManagement.Operation.*;
    
    import java.util.Scanner;
    
    public class AdminUser extends User {
        
    
        private Scanner sc = new Scanner(System.in);
    
        public AdminUser(String name) {
        
            this.name = name;
            operations = new Operation[]{
        
                    new addOperation(),
                    new deleteOperation(),
                    new updateOperation(),
                    new findOperation(),
                    new showOperation(),
            };
        }
    
        @Override
        public int menu() {
        
            Scanner sc = new Scanner(System.in);
            System.out.println("====================================");
            System.out.println("欢迎" + this.name + "登录图书管理系统");
            System.out.println("1.添加书籍");
            System.out.println("2.删除书籍");
            System.out.println("3.更新书籍");
            System.out.println("4.查找书籍");
            System.out.println("5.显示当前书籍列表");
            System.out.println("-1.退出");
            System.out.println("请输入您的选择");
            System.out.println("====================================");
            int select = sc.nextInt();
            if (select == -1) {
        
                close();
            }
            return select;
        }
    
        public void close() {
        
            sc.close();
        }
    }

**OrdinaryUser ：**

package bookManagement.User;
    
    import bookManagement.Operation.*;
    
    import java.util.Scanner;
    
    public class OrdinaryUser extends User {
        
    
        private Scanner sc = new Scanner(System.in);
    
        public OrdinaryUser(String name) {
        
            this.name = name;
            operations = new Operation[]{
        
                    new showOperation(),
                    new findOperation(),
                    new borrowOperation(),
                    new returnOperation(),
            };
        }
    
        @Override
        public int menu() {
        
            System.out.println("====================================");
            System.out.println("欢迎" + this.name + "登录图书管理系统");
            System.out.println("1.显示当前书籍列表");
            System.out.println("2.查询书籍");
            System.out.println("3.借阅书籍");
            System.out.println("4.归还书籍");
            System.out.println("-1.退出");
            System.out.println("请输入您的选择");
            int select = sc.nextInt();
            System.out.println("====================================");
            if (select == -1) {
        
                close();
            }
            return select;
        }
    
        public void close() {
        
            sc.close();
        }
    }

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**Main：**

package bookManagement;
    
    import bookManagement.Book.bookList;
    import bookManagement.User.AdminUser;
    import bookManagement.User.OrdinaryUser;
    import bookManagement.User.User;
    
    import java.util.Scanner;
    
    public class Main {
        
        public static void main(String[] args) {
        
            bookList bookList = new bookList();
            User user = login();
            while (true) {
        
                int select = user.menu();
                if (select == -1) {
        
                    System.out.println("Bye~~");
                    System.exit(0);
                }
                user.doOperation(select, bookList);
            }
        }
    
        public static User login() {
        
            Scanner scanner = new Scanner(System.in);
            System.out.println("请输入您的姓名");
            String name = scanner.nextLine();
            System.out.println("请输入您的身份，1表示普通用户，0表示管理员");
            int who = scanner.nextInt();
            if (who == 1) {
        
                return new OrdinaryUser(name);
            } else {
        
                return new AdminUser(name);
            }
        }
    }

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**运行展示：**  
![在这里插入图片描述][0d34a8da52da470687cb216b47dff776.png]

[1bfcc68c74e94b0c9eb49828ff448f50.png]: https://img-blog.csdnimg.cn/1bfcc68c74e94b0c9eb49828ff448f50.png
[0d34a8da52da470687cb216b47dff776.png]: https://img-blog.csdnimg.cn/0d34a8da52da470687cb216b47dff776.png