Java图书管理系统---命令行

项目列表

Book包

Book类内包含book的基本属性

BookList类初始化图书列表并且提供图书的属性方法

User包

Administrator类

common类

operator包

功能接口

新增图书功能

借阅图书功能

删除图书功能

显示图书功能

查找图书功能

归还图书功能

结束释放资源功能

运行逻辑

项目列表

Book包

Book类内包含book的基本属性

package book;

public class BooK {
    String name;//图书名
    String author;//图书作者
    float price;//图书价格
    String type;//图书类型
    boolean state;//图书状态 借/未借

    public BooK(String name, String author, float price, String type) {
        this.name = name;
        this.author = author;
        this.price = price;
        this.type = type;
        this.state = false;
    }

    @Override
    public String toString() {
        return "book{" +
                "name='" + name + '\'' +
                ", author='" + author + '\'' +
                ", price=" + price +
                ", type='" + type + '\'' +
                ((state)?"借出":"未借出")+
                '}';
    }
}

BookList类初始化图书列表并且提供图书的属性方法

package book;
public class BookList {
    private BooK[] Books=new BooK[10];

    private int count;

    public BookList() {
        Books[0]=new BooK("a","a",10,"a");
        Books[1]=new BooK("b","b",10,"b");
        Books[2]=new BooK("c","c",10,"c");
        this.count=3;
    }

    public int getCount() {
        return count;
    }

    public void SetCount(int i){this.count=i;}

    //对书籍进行修改
    public void setBooks(int i,BooK books) {
        Books[i] = books;
    }

    public void AddSetBooks(int i,BooK books)
    {
        Books[i] = books;
        this.count++;
    }

    //获取对应的书
    public BooK getPos(int i) {
        return Books[i];
    }

    //获取对应书的名字
    public String getBookName(int i)
    {
        return Books[i].name;
    }

    //获取书籍的状态
    public boolean getBookState(int i)
    {
        return Books[i].state;
    }

    public void TrueBookState(int i)
    {
        Books[i].state=true;
    }

    public void FalseBookState(int i)
    {
        Books[i].state=false;
    }
}

User包

Administrator类

package user;

import book.BookList;
import operation.*;

import java.util.Scanner;

public class Administrator extends User{
    public Administrator(String name) {
        super(name);
        //接口数组
        this.iOperations=new IOperation[]{
                new Breakoperation(),
                new Findoperation(),
                new ADDoperation(),
                new Deleteoperation(),
                new Showoperation()
        };
    }

    @Override
    public void DoOperation(int chick, BookList booklist) {
        //接收用户的选择和要操作的图书类
        //调用对应的操作和他重写的work方法，并把图书类booklist传入
        iOperations[chick].work(booklist);
    }

    @Override
    public int menu() {
        System.out.println("1.查找图书\n2.新增图书\n3.删除图书\n4.显示图书\n0.退出系统\n请选择: ");
        Scanner scanner=new Scanner(System.in);
        int chick=scanner.nextInt();
        while(chick<0||chick>4)
        {
            System.out.println("输入有误，请重新输入");
            System.out.println("请选择: ");
            chick=scanner.nextInt();
        }
        return chick;
    }
}

common类

package user;

import book.BookList;
import operation.*;

import java.util.Scanner;

public class common extends User{
    public common(String name) {
        super(name);
        this.iOperations=new IOperation[]{
                new Breakoperation(),
                new Findoperation(),
                new Borrowoperation(),
                new Returnoperation(),
                new Showoperation()
        };
    }

    @Override
    public void DoOperation(int chick, BookList booklist) {
        //接收用户的选择和要操作的图书类
        //调用对应的操作和他重写的work方法，并把图书类booklist传入
        iOperations[chick].work(booklist);
    }

    @Override
    public int menu() {
        System.out.println("1.查找图书\n2.借阅图书\n3.归还图书\n4.查看图书\n0.退出系统\n请选择: ");
        Scanner scanner=new Scanner(System.in);
        int chick=scanner.nextInt();
        while(chick<0||chick>4)
        {
            System.out.println("输入有误，请重新输入");
            System.out.println("请选择: ");
            chick=scanner.nextInt();
        }
        return chick;
    }
}

operator包

功能接口

public interface IOperation {
    public void work(BookList books);
}

新增图书功能

public class ADDoperation implements IOperation{
    @Override
    public void work(BookList books) {
        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");
        float price = scanner.nextInt();
        System.out.println("请输入类型");
        String type = scanner.next();
        BooK book=new BooK(name,author,price,type);
        int cur=books.getCount();
        //在cur下标添加book书
        books.AddSetBooks(cur,book);
        System.out.println("添加成功");
    }
}

借阅图书功能

public class Borrowoperation implements IOperation{
    @Override
    public void work(BookList books) {
        Scanner scanner=new Scanner(System.in);
        System.out.println("请输入要借阅的书");
        String name=scanner.next();
        int cur=books.getCount();
        for (int i = 0; i < cur; i++) {
            if(Objects.equals(name, books.getBookName(i)))
            {
                if(!books.getBookState(i))
                {
                    books.TrueBookState(i);
                    System.out.println("成功借阅"+name);
                }
                else
                {
                    System.out.println("该书已被借出");
                }
            }
        }
    }
}

删除图书功能

public class Deleteoperation implements IOperation{
    public void work(BookList bookList) {

        System.out.println("请输入要删除的书名");
        Scanner scanner=new Scanner(System.in);
        String name=scanner.next();
        int cur=bookList.getCount();
        String Bookname;
        int index=0;
        int i=0;
        for (; i < cur; i++)
        {
            if(Objects.equals(name, Bookname = bookList.getBookName(i)))
            {
                index=i;
                break;
            }
        }
        if(i==cur)
        {
            System.out.println("未查找到此书");
        }
        else
        {
            //0 2
            //
            for (int j = index; j < cur-1; j++) {
                //books[j]=books[j+1]
                //获取书籍
                BooK book=bookList.getPos(j+1);
                bookList.setBooks(j,book);
            }
            bookList.SetCount(cur-1);
        }
    }
}

显示图书功能

public class Showoperation implements IOperation{
    @Override
    public void work(BookList books) {
        int cur=books.getCount();

        for (int i = 0; i < cur; i++) {
            BooK book=books.getPos(i);
            System.out.println(book);
        }
    }
}

查找图书功能

public class Findoperation implements IOperation{
    @Override
    public void work(BookList books) {
        System.out.println("请输入要查找的书名");
        Scanner scanner=new Scanner(System.in);
        String name=scanner.next();
        int cur=books.getCount();
        for (int i = 0; i < cur; i++)
        {
            //用户输入的数据和类内数据进行判断时，不能用==要用equals
            if(Objects.equals(name, books.getBookName(i)))
            {
                BooK book=books.getPos(i);
                System.out.println(book);
                return;
            }
        }
        System.out.println("未查找到该书");
    }
}

归还图书功能

public class Returnoperation implements IOperation {
    @Override
    public void work(BookList books) {
        Scanner scanner=new Scanner(System.in);
        System.out.println("请输入要归还的书");
        String name=scanner.next();
        int cur=books.getCount();
        for (int i = 0; i < cur; i++) {
            if(Objects.equals(name, books.getBookName(i)))
            {
                if(!books.getBookState(i))
                {
                    System.out.println("该书并未被借出");
                }
                else
                {
                    books.FalseBookState(i);
                    System.out.println("已成功归还"+name);
                }
            }
        }
    }
}

结束释放资源功能

public class Breakoperation implements IOperation{
    @Override
    public void work(BookList books) {
        System.out.println("结束");
        int cur=books.getCount();
        for (int i = 0; i < cur; i++) {
            books.setBooks(i,null);
        }
        System.exit(0);
    }
}