前往小程序，Get更优阅读体验！
立即前往
文档建议反馈控制台
首页
学习
活动
专区
工具
TVP
最新优惠活动
文章/答案/技术大牛
发布
首页
学习
活动
专区
工具
TVP最新优惠活动
返回腾讯云官网
社区首页 >专栏 >【Java项目】小练习——图书管理系统

【Java项目】小练习——图书管理系统

作者头像
xxxflower
发布于 2023-04-16 17:37:38
8840
发布于 2023-04-16 17:37:38
举报
文章被收录于专栏：《数据结构》《数据结构》

今天我们来练习一个小项目：图书管理系统 我们先来看一下这个项目的运行效果： 使用者分为管理员和普通用户。

我们先来看一下普通用户的操作：

在这里插入图片描述
在这里插入图片描述

我们再来看一下管理员的操作：

在这里插入图片描述
在这里插入图片描述
在这里插入图片描述
在这里插入图片描述

接下来我们一起来看一下这个程序的代码：

图书管理系统

book

Book

代码语言：javascript
复制
package book;

public class Book {
    private String name;
    private String author;
    private int price;
    private String type;
    private boolean isBorrowed;

    public Book(String name, String author, int price, String type) {
        this.name = name;
        this.author = author;
        this.price = price;
        this.type = type;
    }

    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 int getPrice() {
        return price;
    }

    public void setPrice(int 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() == true)? "该书已经借出":"该书未借出")+
                '}';
    }
}

BookList

代码语言：javascript
复制
package book;

public class BookList {
    private Book[] books = new Book[10];
    private int usedSize;//储存当前书的个数

    public BookList(){
        books[0] = new Book("三体地球往事","刘慈欣",33,"小说");
        books[1] = new Book("三体黑暗森林","刘慈欣",34,"小说");
        books[2] = new Book("三体死神永生","刘慈欣",35,"小说");
        this.usedSize = 3;
    }

    public int getUsedSize() {
        return usedSize;
    }

    public void setUsedSize(int usedSize) {
        this.usedSize = usedSize;
    }

    public Book getPos(int pos){
        return books[pos];
    }

    public void setBooks(Book book,int pos){
        books[pos] = book;
    }
}

operations

AddOPeration

代码语言：javascript
复制
package operations;

import book.Book;
import book.BookList;

import java.util.Scanner;

public class AddOperation implements IOPeration{
    public void work(BookList bookList){
        System.out.println("新增图书！");
        System.out.println("请输入你要新增的图书的名字：");
        Scanner scanner = new Scanner(System.in);
        String name = scanner.nextLine();
        System.out.println("请输入你要新增图书的作者：");
        String author = scanner.nextLine();

        System.out.println("请输入你要新增图书的价格：");
        int price = scanner.nextInt();
        scanner.nextLine();//读入回车
        System.out.println("请输入你要新增图书的类型：");
        String type = scanner.nextLine();

        Book book = new Book(name,author,price,type);

        //1.获取当前可以存放的书籍
        int currentSize = bookList.getUsedSize();
        //2.把书放在指定位置
        bookList.setBooks(book,currentSize);
        //书的有效个数
        bookList.setUsedSize(currentSize+1);
    }

}

BorrowOperation

代码语言：javascript
复制
package operations;

import book.Book;
import book.BookList;

import java.util.Scanner;

public class BorrowOperation implements IOPeration{
    public void work(BookList bookList){
        System.out.println("借阅图书！");
        System.out.println("请输入你要借阅书籍的名字：");
        Scanner scanner = new Scanner(System.in);
        String name = scanner.nextLine();
        int currentSize = bookList.getUsedSize();
        for (int i = 0; i < currentSize; i++) {
            Book book = bookList.getPos(i);
            if (name.equals(book.getName())) {
                if (book.isBorrowed()) {
                    System.out.println("该书已经被借出！");
                } else {
                    book.setBorrowed(true);
                    System.out.println("借阅图书成功！");
                }
                return;
            }
        }
        System.out.println("没有你要借阅的书！");
    }
}

DelOperation

代码语言：javascript
复制
package operations;

import book.Book;
import book.BookList;

import java.util.Scanner;

public class DelOperation implements IOPeration{
    public void work(BookList bookList){
        System.out.println("删除图书！");
        System.out.println("请输入要删除的图书：");
        Scanner scanner = new Scanner(System.in);
        String name = scanner.nextLine();
        //1.遍历数组当中 是否有你要删除的书，有记录下标
        int index = -1;
        int currentSize = bookList.getUsedSize();
        for (int i = 0; i < currentSize; i++) {
            Book book = bookList.getPos(i);
            if(name.equals(book.getName())){
                index = i;
                break;
            }
        }
        if(index == -1){
            System.out.println("没有你要删除的书！");
            return;
        }
        for (int i = index; i < currentSize-1; i++) {
            Book book = bookList.getPos(i+1);
            bookList.setBooks(book,i);
        }

        bookList.setBooks(null,currentSize-1);
        bookList.setUsedSize(currentSize-1);
        System.out.println("删除成功！");
    }
}

DisplayOperation

代码语言：javascript
复制
package operations;

import book.Book;
import book.BookList;

public class DisplayOperation implements IOPeration{
    public void work(BookList bookList){
        System.out.println("显示所有图书！");

        int currentSize = bookList.getUsedSize();

        for (int i = 0; i < currentSize; i++) {
            Book book = bookList.getPos(i);
            System.out.println(book);
        }
    }
}

ExitOperation

代码语言：javascript
复制
package operations;

import book.BookList;

public class ExitOperation implements IOPeration{
    @Override
    public void work(BookList bookList) {
        System.out.println("退出系统！");
        System.exit(0);
    }
}

FindOperation

代码语言：javascript
复制
package operations;

import book.Book;
import book.BookList;

import java.util.Scanner;

public class FindOperation implements IOPeration{
    @Override
    public void work(BookList bookList) {
        System.out.println("查找图书！");
        System.out.println("请输入你要查找图书的名字：");
        Scanner scanner = new Scanner(System.in);
        String name = scanner.nextLine();

        int currentSize = bookList.getUsedSize();
        for (int i = 0; i < currentSize; i++) {
            Book book = bookList.getPos(i);
            if(name.equals(book.getName())){
                System.out.println("找到了这本书！");
                System.out.println(book);
                return;
            }
        }
        System.out.println("没有这本书！");
    }
}

IOPeration

代码语言：javascript
复制
package operations;

import book.BookList;

public interface IOPeration {
        void work(BookList bookList);
}

ReturnOperation

代码语言：javascript
复制
package operations;

import book.Book;
import book.BookList;

import java.util.Scanner;

public class ReturnOperation implements IOPeration{
    @Override
    public void work(BookList bookList) {
        System.out.println("归还图书！");
        System.out.println("请输入你要归还图书的名字：");
        Scanner scanner = new Scanner(System.in);
        String name = scanner.nextLine();

        int currentSize = bookList.getUsedSize();
        for (int i = 0; i < currentSize; i++) {
            Book book = bookList.getPos(i);
            if(name.equals(book.getName())){
                book.setBorrowed(false);
                System.out.println("归还图书成功！");
                return;
            }
        }
        System.out.println("没有你要归还的图书！");
    }
}

user

AdminerUser

代码语言：javascript
复制
package user;

import operations.*;

import java.util.Scanner;

public class AdminerUser extends User{
    public AdminerUser(String name){
        super(name);
        this.ioPerations = new IOPeration[]{
                new ExitOperation(),
                new FindOperation(),
                new AddOperation(),
                new DelOperation(),
                new DisplayOperation()
        };
    }

    public int menu(){
        System.out.println("**************************************");
        System.out.println("hello "+name+ "欢迎来到图书管理系统！");
        System.out.println("1.查找图书");
        System.out.println("2.新增图书");
        System.out.println("3.删除图书");
        System.out.println("4.显示图书");
        System.out.println("0.退出系统");
        System.out.println("**************************************");
        System.out.println("请输入你的操作：");
        Scanner scanner = new Scanner(System.in);
        int choic = scanner.nextInt();
        return choic;
    }

}

NormalUser

代码语言：javascript
复制
package user;

import operations.*;

import java.util.Scanner;

public class NormalUser extends User{
    public NormalUser(String name){
        super(name);

        this.ioPerations =new IOPeration[]{
                new ExitOperation(),
                new FindOperation(),
                new BorrowOperation(),
                new ReturnOperation()
        };
    }

    public int menu(){
        System.out.println("**************************************");
        System.out.println("hello "+name+ "欢迎来到图书管理系统！");
        System.out.println("1.查找图书");
        System.out.println("2.借阅图书");
        System.out.println("3.归还图书");
        System.out.println("0.退出系统");
        System.out.println("**************************************");
        System.out.println("请输入你的操作：");
        Scanner scanner = new Scanner(System.in);
        int choic = scanner.nextInt();
        return choic;
    }

}

User

代码语言：javascript
复制
package user;

import book.BookList;
import operations.IOPeration;

public abstract class User {
    protected String name;
    protected IOPeration[] ioPerations;
    public User(String name){
        this.name = name;
    }

    public abstract int menu();

    public void doOperation(int choic, BookList bookList){
        ioPerations[choic].work(bookList);
    }

}

Main

代码语言：javascript
复制
import book.BookList;
import user.AdminerUser;
import user.NormalUser;
import user.User;

import java.util.Scanner;


public class Main {

    public static User login(){
        System.out.println("请输入你的姓名：");
        Scanner scanner = new Scanner(System.in);
        String userName = scanner.nextLine();
        System.out.println("请输入你的身份：1-》管理员 0-》普通用户");
        int choic = scanner.nextInt();
        //根据用户输入的数字判断身份 发生向上转型
        if(choic == 1){
            return new AdminerUser(userName);
        }else{
            return new NormalUser(userName);
        }
    }

    public static void main(String[] args) {
        //0.准备数据
        BookList bookList = new BookList();
        //1.登录
        User user = login();
        while (true){
            int choic = user.menu();
            user.doOperation(choic,bookList);
        }
    }
}
本文参与 腾讯云自媒体同步曝光计划，分享自作者个人站点/博客。
原始发表：2022-10-02，如有侵权请联系 cloudcommunity@tencent.com 删除
java
程序

本文分享自 作者个人站点/博客 前往查看

如有侵权，请联系 cloudcommunity@tencent.com 删除。

本文参与 腾讯云自媒体同步曝光计划  ，欢迎热爱写作的你一起参与！

java
程序
评论
登录后参与评论
0 条评论
热度
最新
登录 后参与评论
推荐阅读
LV.
文章
0
获赞
0
目录
  • 图书管理系统
    • book
      • Book
      • BookList
    • operations
      • AddOPeration
      • BorrowOperation
      • DelOperation
      • DisplayOperation
      • ExitOperation
      • FindOperation
      • IOPeration
      • ReturnOperation
    • user
      • AdminerUser
      • NormalUser
      • User
    • Main
    领券

    腾讯云开发者

    扫码关注腾讯云开发者

    扫码关注腾讯云开发者

    领取腾讯云代金券

    热门产品

    热门推荐

    更多推荐

    Copyright © 2013 - 2024 Tencent Cloud. All Rights Reserved. 腾讯云 版权所有 

    深圳市腾讯计算机系统有限公司 ICP备案/许可证号：粤B2-20090059 深公网安备号 44030502008569

    腾讯云计算（北京）有限责任公司 京ICP证150476号 |  京ICP备11018762号 | 京公网安备号11010802020287

    问题归档专栏文章快讯文章归档关键词归档开发者手册归档开发者手册 Section 归档

    Copyright © 2013 - 2024 Tencent Cloud.

    All Rights Reserved. 腾讯云 版权所有

    登录 后参与评论