Java图书管理系统

Java图书管理系统是一个用Java语言编写的软件，用于管理图书馆或书店的图书信息。它可以实现管理员和普通用户两种身份的登录和操作，包括增添图书、删除图书、查找图书、展示图书、借阅图书和归还图书等功能。

下面是Java图书管理系统的基本架构：

1. BOOK包：包含Book类，用于表示一本书的信息，如书名、作者、价格、分类等。

2. BOOKLIST包：包含Booklist类，用于管理所有的图书信息，包括增添图书、删除图书、查找图书、展示图书等功能。

3. FUNCTION包：包含Ifunction接口，用于定义管理员和普通用户的操作接口。

4. ADMIN包：包含Admin类，用于实现管理员的操作，包括增添图书、删除图书、查找图书、展示图书和退出系统等功能。

5. USER包：包含User类，用于实现普通用户的操作，包括查找图书、借阅图书、归还图书和退出系统等功能。

下面是Java图书管理系统的代码实现：

1. Book类

package BOOK;

public class Book {
    private String name; // 书名
    private String author; // 作者
    private double price; // 价格
    private String category; // 分类
    private boolean borrowed; // 是否被借出

    public Book(String name, String author, double price, String category, boolean borrowed) {
        this.name = name;
        this.author = author;
        this.price = price;
        this.category = category;
        this.borrowed = borrowed;
    }

    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 getCategory() {
        return category;
    }

    public void setCategory(String category) {
        this.category = category;
    }

    public boolean isBorrowed() {
        return borrowed;
    }

    public void setBorrowed(boolean borrowed) {
        this.borrowed = borrowed;
    }
}

2. Booklist类

package BOOKLIST;

import BOOK.Book;

public class Booklist {
    public Book[] books = new Book[10];
    private int booknum;

    {
        books[0] = new Book("java", "张三", 12, "编程", false);
        books[1] = new Book("pathon", "lisi", 12, "编程", false);
        books[2] = new Book("matlab", "wangwu", 12, "编程", false);
        booknum = 3;
    }

    public int getBooknum() {
        return booknum;
    }

    public void setBooknum(int booknum) {
        this.booknum = booknum;
    }

    public void addBook(Book book) {
        books[booknum] = book;
        booknum++;
    }

    public void deleteBook(String name) {
        for (int i = 0; i < booknum; i++) {
            if (books[i].getName().equals(name)) {
                for (int j = i; j < booknum - 1; j++) {
                    books[j] = books[j + 1];
                }
                booknum--;
                break;
            }
        }
    }

    public Book findBook(String name) {
        for (int i = 0; i < booknum; i++) {
            if (books[i].getName().equals(name)) {
                return books[i];
            }
        }
        return null;
    }

    public void display() {
        for (int i = 0; i < booknum; i++) {
            System.out.println("书名：" + books[i].getName() + "，作者：" + books[i].getAuthor() + "，价格：" + books[i].getPrice() + "，分类：" + books[i].getCategory() + "，是否被借出：" + books[i].isBorrowed());
        }
    }
}

3. Ifunction接口

package FUNCTION;

public interface Ifunction {
    void addBook(); // 增添图书

    void deleteBook(); // 删除图书

    void findBook(); // 查找图书

    void display(); // 展示图书

    void exit(); // 退出系统
}

4. Admin类

package ADMIN;

import BOOKLIST.Booklist;
import FUNCTION.Ifunction;
import java.util.Scanner;

public class Admin implements Ifunction {
    private Booklist booklist;

    public Admin(Booklist booklist) {
        this.booklist = booklist;
    }

    @Override
    public void addBook() {
        Scanner scanner = new Scanner(System.in);
        System.out.println("请输入书名：");
        String name = scanner.next();
        System.out.println("请输入作者：");
        String author = scanner.next();
        System.out.println("请输入价格：");
        double price = scanner.nextDouble();
        System.out.println("请输入分类：");
        String category = scanner.next();
        booklist.addBook(new BOOK.Book(name, author, price, category, false));
        System.out.println("添加成功！");
    }

    @Override
    public void deleteBook() {
        Scanner scanner = new Scanner(System.in);
        System.out.println("请输入要删除的书名：");
        String name = scanner.next();
        booklist.deleteBook(name);
        System.out.println("删除成功！");
    }

    @Override
    public void findBook() {
        Scanner scanner = new Scanner(System.in);
        System.out.println("请输入要查找的书名：");
        String name = scanner.next();
        BOOK.Book book = booklist.findBook(name);
        if (book != null) {
            System.out.println("书名：" + book.getName() + "，作者：" + book.getAuthor() + "，价格：" + book.getPrice() + "，分类：" + book.getCategory() + "，是否被借出：" + book.isBorrowed());
        } else {
            System.out.println("未找到该书！");
        }
    }

    @Override
    public void display() {
        booklist.display();
    }

    @Override
    public void exit() {
        System.exit(0);
    }
}

5. User类

package USER;

import BOOK.Book;
import BOOKLIST.Booklist;
import FUNCTION.Ifunction;
import java.util.Scanner;

public class User implements Ifunction {
    private Booklist booklist;

    public User(Booklist booklist) {
        this.booklist = booklist;
    }

    @Override
    public void addBook() {
        System.out.println("您没有权限进行此操作！");
    }

    @Override
    public void deleteBook() {
        System.out.println("您没有权限进行此操作！");
    }

    @Override
    public void findBook() {
        Scanner scanner = new Scanner(System.in);
        System.out.println("请输入要查找的书名：");
        String name = scanner.next();
        Book book = booklist.findBook(name);
        if (book != null) {
            System.out.println("书名：" + book.getName() + "，作者：" + book.getAuthor() + "，价格：" + book.getPrice() + "，分类：" + book.getCategory() + "，是否被借出：" + book.isBorrowed());
        } else {
            System.out.println("未找到该书！");
        }
    }

    @Override
    public void display() {
        booklist.display();
    }

    @Override
    public void exit() {
        System.exit(0);
    }
}

以上是Java图书管理系统的基本实现，你可以根据需要进行修改和扩展。