一.book包

book包底下有两个类

一个是book类，另一个是book list类

具体代码以下实现：

package book;

public class book {
    private String name;
    private int price;
    private String author;
    private String isBrow="未借阅";

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

    public void setName(String name) {
        this.name = name;
    }

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

    public void setAuthor(String author) {
        this.author = author;
    }

    public void setBrow(String brow) {
        isBrow = brow;
    }

    public String getName() {
        return name;
    }

    public int getPrice() {
        return price;
    }

    public String getAuthor() {
        return author;
    }

    public String isBrow() {
        return isBrow;
    }

    @Override
    public String toString() {
        return "book{" +
                "name='" + name + '\'' +
                ", price=" + price +
                ", author='" + author + '\'' +
                ", isBrow=" + isBrow +
                '}';
    }
}
package book;

public class Booklist {
    book[] Book=new book[10];//最多存十本书
private int MaxSize;

   public void setBook(int pos,book Book){
       this.Book[pos]=Book;
   }

    public Booklist() {
        Book[0]=new book("三国演义",32,"吴承恩");
        Book[1]=new book("水浒传",21,"曹雪芹");
        Book[2]=new book("西游记",21,"大鹏");
        MaxSize=3;
    }
    public book getBook(int pos)
    {
        return Book[pos];
    }

    public int getMaxSize() {
        return MaxSize;
    }

    public void setMaxSize(int maxSize) {
        MaxSize = maxSize;
    }
}

2.operation包也就是操作包

包底下有operation接口以及增删查操作，退出系统操作和借阅图书操作以及归还图书操作和展示所有图书操作，其中每一个操作都是一个class文件

package Operation;

import book.Booklist;


public interface IOoperation {
      void work(Booklist booklist);//操作


}
package Operation;

import book.Booklist;
import book.book;

import java.util.Scanner;

public class addOperation implements IOoperation {
    public void work(Booklist booklist) {
         System.out.println("增加图书");
         System.out.println("请输入书本的名称：");
         Scanner scanner=new Scanner(System.in);
         String name=scanner.nextLine();
        System.out.println("请输入书籍的作者");
         String author=scanner.nextLine();
         System.out.println("请输入书籍的价格");
         int price=scanner.nextInt();
         book Book=new book(name,price,author);
         int currentSize=booklist.getMaxSize();
         booklist.setBook(currentSize,Book);
         booklist.setMaxSize(currentSize+1);
        System.out.println("添加书籍成功！");

    }
}
package Operation;

import book.Booklist;

import java.util.Scanner;

public class BorrowOperation implements IOoperation{
    @Override
    public void work(Booklist booklist) {
        System.out.println("借阅图书");
        System.out.println("请输入要租借的书籍名字");
        Scanner scanner=new Scanner(System.in);
        String name=scanner.nextLine();
        for (int i = 0; i <booklist.getMaxSize() ; i++) {
            if(booklist.getBook(i).getName().equals(name))

            {
                if( booklist.getBook(i).isBrow().equals("已经借出"))
                {
                    System.out.println("这本书已经被借走了");
                    break;
                }
                else {
                    booklist.getBook(i).setBrow("已经借出");
                    System.out.println("借书成功！");
                    break;
                }
            }
            else
                System.out.println("没有找到这本书");


        }

    }
}
package Operation;

import book.Booklist;

import java.util.Scanner;

public class DelOperation implements IOoperation{
    public void work(Booklist booklist){
        System.out.println("删除图书");
        Scanner scanner=new Scanner(System.in);
        System.out.println("请输入要删除书籍的姓名");
        String name=scanner.nextLine();
        for (int i = 0; i <booklist.getMaxSize() ; i++) {
            if(booklist.getBook(i).getName().equals(name)) {
                int index = i;
                booklist.setBook(i, booklist.getBook(booklist.getMaxSize() - 1));
                booklist.setBook(booklist.getMaxSize()-1, null);
                booklist.setMaxSize(booklist.getMaxSize() - 1);
                System.out.println("删除成功");
                break;


            }else{
                System.out.println("没有这本书");
            }


        }

    }
}
package Operation;

import book.Booklist;

public class DisplayOperation implements IOoperation{
    @Override
    public void work(Booklist booklist) {
        System.out.println("展示图书");
        for (int i = 0; i <booklist.getMaxSize() ; i++) {
            System.out.println(booklist.getBook(i));

        }
    }
}
package Operation;

import book.Booklist;

public class ExitOperation implements IOoperation{
    @Override
    public void work(Booklist booklist) {
        System.out.println("退出程序");
        System.exit(0);
    }
}
package Operation;

import book.Booklist;

import java.util.Scanner;

public class FindOperation implements IOoperation{
    public void work(Booklist booklist){
        System.out.println("查找图书");
        System.out.println("请输入您要查找图书的名字");
        Scanner scanner=new Scanner(System.in);
        String name=scanner.nextLine();
        for (int i = 0; i <booklist.getMaxSize()-1 ; i++) {
            if (booklist.getBook(i).getName().equals(name)) {
                System.out.println(booklist.getBook(i));
                break;
            }
            else{
                System.out.println("没有找到这本书");
            }

        }
    }
}
package Operation;

import book.Booklist;

import java.util.Scanner;

public class returnOperation implements IOoperation{
    public void work(Booklist booklist){
        System.out.println("归还图书");
        Scanner scanner=new Scanner(System.in);
        System.out.println("请输入您要归还的图书书籍的名字");
        String name=scanner.nextLine();
        for (int i = 0; i <booklist.getMaxSize()-1 ; i++) {
            if (booklist.getBook(i).getName().equals(name))
            {
                booklist.getBook(i).setBrow("未借阅");
                System.out.println("归还成功");
                break;
            }
            else
            {
                System.out.println("没有找到这本书");
            }

        }

    }
}

3.User包也就是用户包

用户包地下有三个class文件一个是最基本的抽象类用户class以及一个普通用户class和一个管理用户class

package Uster;

import Operation.IOoperation;
import book.Booklist;

public abstract class User {
    String name;
    protected IOoperation[] iOperations;
    public User(String name){
        this.name=name;
    }
    public abstract int menu();
    public void doOperation(int choice, Booklist booklist){
        iOperations[choice].work(booklist );
    }
}
package Uster;

import Operation.*;

import java.util.Scanner;

public class NormalUser extends User {
    public NormalUser(String name) {
        super(name);
        this.iOperations=new IOoperation[]{
                new ExitOperation(),
                new FindOperation(),
                new BorrowOperation(),
                new returnOperation()


        };
    }
    public int menu(){
        System.out.println("欢迎"+name+"用户");
        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("请输入你的操作：");
        Scanner scanner=new Scanner(System.in);
        int choice=scanner.nextInt();
        return choice;
    }

}
package Uster;

import Operation.*;

import java.util.Scanner;

public class AdminUser extends User{
    public AdminUser(String name) {
        super(name);
        this.iOperations=new IOoperation[]{
                new ExitOperation(),
                new FindOperation(),
                new addOperation(),
                new DelOperation(),
                new DisplayOperation()

        };
    }
    public int menu(){
        System.out.println("欢迎"+name+"用户");
        System.out.println("1.查找图书");
        System.out.println("2.增加图书");
        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("请输入你的操作：");
        Scanner scanner=new Scanner(System.in);
        int choice=scanner.nextInt();
        return choice;
    }

}

4.Test主包

主函数包含在里面，将所有操作整合在一起，形成一个完整的操作，图书管理系统。

package Test;

import Uster.AdminUser;
import Uster.NormalUser;
import Uster.User;
import book.Booklist;

import java.sql.SQLOutput;
import java.util.Scanner;

public class Test {
    public static User login(){
        System.out.println("请输入您的姓名：");
        Scanner scanner=new Scanner(System.in);
        String name= scanner.nextLine();
        System.out.println("请输入：1->管理员 2->普通用户");
        int choice=scanner.nextInt();
        if(choice==1){
            return new AdminUser(name);
        }else{
            return new NormalUser(name);

        }
    }
    public static void main(String[] args){
        Booklist booklist=new Booklist();
        User user=login();
        //动态绑定
        while(true){

            int choice=user.menu();
            user.doOperation(choice,booklist);


        }
    }
}

5.总结

代码写到这里就完成了，有什么问题可以私信问我

原文链接：https://blog.csdn.net/qq_53283658/article/details/125398566

一.book包

2.operation包也就是操作包

3.User包也就是用户 包

4.Test主包

5.总结

3.User包也就是用户包