＜Java＞ 图书管理系统. 课程设计之经典（学不会给我发红包）

目录

Package

（书-包）book

（书-类）Book

（书架-类）BookList

（操作-包）operation

（操作接口）IOperation

（添加图书）AddOperation

（借阅图书）BorrowOperation

（删除图书）DelOperation

（显示图书）DisplayOperation

（退出系统）ExitOperation

（查找图书）FindOperation

（归还图书）ReturnOperation

（用户-包）user

（用户父类）User

（管理员）AdminUser

（普通用户）NormalUser

（开始函数）Main

---

Package

（书-包）book

（书-类）Book

package book;

/**
 * Created with IntelliJ IDEA.
 * Description:书
 * User: 86155
 * Date: 2022-05-18
 * Time: 10:12
 */
public class Book {
    private String name;//书名
    private String author;//作者
    private int price;//价格
    private String type;//类型
    private boolean isBorrowed;//是否被借出

    //编译器生成方法

    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)?", 已借出":", 未借出") +
                '}';
    }
}

（书架-类）BookList

package book;

/**
 * Created with IntelliJ IDEA.
 * Description:书架
 * User: 86155
 * Date: 2022-05-18
 * Time: 10:12
 */
public class BookList {
    private Book[] books = new Book[10];//书架最多可以放10本书
    private int usedSize;//记录书架上放了几本书

    //构造函数
    public BookList(){
        //书架上先放几本书
        books[0] = new Book("三国演义","罗贯中",19,"小说");
        books[1] = new Book("水浒传","施耐庵",29,"小说");
        books[2] = new Book("西游记","吴承恩",23,"小说");
        usedSize = 3;
    }
    //get set 公开接口
    //给到下标可以从书架上得到书的信息
    public Book getBook(int pos){//pos位置一定是合法的
        return books[pos];
    }
    //往书架上放书
    public void setBooks(int pos,Book book){
        books[pos] = book;
    }

    public int getUsedSize() {
        return usedSize;
    }

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

（操作-包）operation

（操作接口）IOperation

package operation;

import book.Book;
import book.BookList;

/**
 * Created with IntelliJ IDEA.
 * Description:
 * User: 86155
 * Date: 2022-05-18
 * Time: 10:55
 */
public interface IOperation {
    //通过一个规范的接口来访问操作我的书架
    void work(BookList bookList);
}

（添加图书）AddOperation

package operation;

import book.Book;
import book.BookList;

import java.util.Scanner;

/**
 * Created with IntelliJ IDEA.
 * Description:
 * User: 86155
 * Date: 2022-05-18
 * Time: 10:57
 */
public class AddOperation implements IOperation{
    @Override
    public void work(BookList bookList) {
        //创建出这本书
        System.out.println("新增图书！");
        Scanner scanner = new Scanner(System.in);
        System.out.println("请输入图书的名字：");
        String name = scanner.nextLine();
        System.out.println("请输入图书的作者：");
        String author = scanner.nextLine();
        System.out.println("请输入图书的价钱：");
        int price = scanner.nextInt();
        scanner.nextLine();
        System.out.println("请输入图书的类型：");
        String type = scanner.nextLine();

        Book book = new Book(name,author,price,type);
        //把它放到书架上
        int currentSize = bookList.getUsedSize();
        bookList.setBooks(currentSize,book);
        bookList.setUsedSize(currentSize+1);

        System.out.println("新增书籍成功！");
    }
}

（借阅图书）BorrowOperation

package operation;

import book.Book;
import book.BookList;

import java.util.Scanner;

/**
 * Created with IntelliJ IDEA.
 * Description:
 * User: 86155
 * Date: 2022-05-18
 * Time: 11:03
 */
public class BorrowOperation implements IOperation{
    @Override
    public void work(BookList bookList) {
        System.out.println("借阅图书！");
        Scanner scanner = new Scanner(System.in);
        System.out.println("请输入你要借阅图书的名字：");
        String name = scanner.nextLine();
        //遍历书架
        int currentSize = bookList.getUsedSize();
        for (int i = 0; i < currentSize; i++) {
            Book book = bookList.getBook(i);
            if(book.getName().equals(name)){
                book.setBorrowed(true);
                System.out.println("借阅成功！");
                return;
            }
        }
        System.out.println("没有你要找的书");
    }
}

（删除图书）DelOperation

package operation;

import book.Book;
import book.BookList;

import java.util.Scanner;

/**
 * Created with IntelliJ IDEA.
 * Description:
 * User: 86155
 * Date: 2022-05-18
 * Time: 10:59
 */
public class DelOperation implements IOperation{
    @Override
    public void work(BookList bookList) {
        System.out.println("删除图书！");
        System.out.println("请输入你要输出图书的名字：");
        Scanner scanner = new Scanner(System.in);
        String name = scanner.nextLine();
        //遍历书架
        int currentSize = bookList.getUsedSize();
        for (int i = 0; i < currentSize; i++) {
            Book book = bookList.getBook(i);
            if(book.getName().equals(name)){
                for (int j = i; j < currentSize; j++) {
                    bookList.setBooks(j,bookList.getBook(j+1));
                }
                bookList.setUsedSize(currentSize-1);
                System.out.println("删除成功！");
                return;
            }
        }
        System.out.println("没有你要找的书");
    }
}

（显示图书）DisplayOperation

package operation;

import book.Book;
import book.BookList;

/**
 * Created with IntelliJ IDEA.
 * Description:
 * User: 86155
 * Date: 2022-05-18
 * Time: 11:00
 */
public class DisplayOperation implements IOperation{
    @Override
    public void work(BookList bookList) {
        System.out.println("显示图书！");
        //遍历书架
        int currentSize = bookList.getUsedSize();
        for (int i = 0; i < currentSize; i++) {
            System.out.println(bookList.getBook(i));
        }
    }
}

（退出系统）ExitOperation

package operation;

import book.BookList;

/**
 * Created with IntelliJ IDEA.
 * Description:
 * User: 86155
 * Date: 2022-05-18
 * Time: 11:02
 */
public class ExitOperation implements IOperation{
    @Override
    public void work(BookList bookList) {
        System.out.println("退出系统！");
        System.exit(0);
    }
}

（查找图书）FindOperation

package operation;

import book.Book;
import book.BookList;

import java.util.Scanner;

/**
 * Created with IntelliJ IDEA.
 * Description:
 * User: 86155
 * Date: 2022-05-18
 * Time: 10:58
 */
public class FindOperation implements IOperation{
    @Override
    public void work(BookList bookList) {
        System.out.println("查找图书！");
        Scanner scanner = new Scanner(System.in);
        System.out.println("请输入你要查找图书的名字：");
        String name = scanner.nextLine();
        //遍历书架
        int currentSize = bookList.getUsedSize();
        for (int i = 0; i < currentSize; i++) {
            Book book = bookList.getBook(i);
            if(book.getName().equals(name)){
                System.out.println("找到了这本书！");
                System.out.println(book);
                return;
            }
        }
        System.out.println("没有你要找的书");
    }
}

（归还图书）ReturnOperation

package operation;

import book.Book;
import book.BookList;

import java.util.Scanner;

/**
 * Created with IntelliJ IDEA.
 * Description:
 * User: 86155
 * Date: 2022-05-18
 * Time: 11:04
 */
public class ReturnOperation implements IOperation{
    @Override
    public void work(BookList bookList) {
        System.out.println("归还图书！");
        Scanner scanner = new Scanner(System.in);
        System.out.println("请输入你要归还图书的名字：");
        String name = scanner.nextLine();
        //遍历书架
        int currentSize = bookList.getUsedSize();
        for (int i = 0; i < currentSize; i++) {
            Book book = bookList.getBook(i);
            if(book.getName().equals(name)){
                book.setBorrowed(false);
                System.out.println("归还成功！");
                return;
            }
        }
        System.out.println("没有你要找的书");
    }
}

（用户-包）user

（用户父类）User

package user;

import book.BookList;
import operation.IOperation;

/**
 * Created with IntelliJ IDEA.
 * Description:
 * User: 86155
 * Date: 2022-05-18
 * Time: 11:08
 */
//不管是普通人员还是管理人员，其父类都是User
public abstract class User {
    protected String name;//用户名
    protected IOperation[] iOperations;//接口数组 - 菜单选择的操作

    public User(String name){
        this.name = name;
    }
    public abstract int menu();
    //用来访问接口数组的哪个函数来操作书架
    public void doOperation(int choice , BookList bookList){
        this.iOperations[choice].work(bookList);//操作数选择了几，就调用这个函数的work方法
    }
}

（管理员）AdminUser

package user;

import operation.*;

import java.util.Scanner;

/**
 * Created with IntelliJ IDEA.
 * Description:
 * User: 86155
 * Date: 2022-05-18
 * Time: 11:12
 */
public class AdminUser extends User{
    //显示的帮助父类构造
    public AdminUser(String name){
        super(name);
        this.iOperations = new IOperation[]{
                new ExitOperation(),
                new FindOperation(),
                new AddOperation(),
                new DelOperation(),
                new DisplayOperation()
        };
    }
    //菜单
    public int menu(){
        System.out.println("欢迎"+this.name+"管理图书馆！");
        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("请输入你的操作：");
        Scanner scanner = new Scanner(System.in);
        int choice = scanner.nextInt();
        return choice;
    }
}

（普通用户）NormalUser

package user;

import operation.*;

import java.util.Scanner;

/**
 * Created with IntelliJ IDEA.
 * Description:
 * User: 86155
 * Date: 2022-05-18
 * Time: 11:11
 */
public class NormalUser extends User{
    public NormalUser(String name){
        super(name);
        this.iOperations = new IOperation[]{
                new ExitOperation(),
                new FindOperation(),
                new BorrowOperation(),
                new ReturnOperation()
        };
    }
    //菜单
    public int menu(){
        System.out.println("欢迎"+this.name+"来到图书馆！");
        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;
    }
}

（开始函数）Main

import book.BookList;
import user.AdminUser;
import user.NormalUser;
import user.User;

import javax.jws.soap.SOAPBinding;
import java.util.Scanner;

/**
 * Created with IntelliJ IDEA.
 * Description:
 * User: 86155
 * Date: 2022-05-18
 * Time: 11:32
 */
public class Main {
    public static User login(){
        System.out.println("请输入你的用户名：");
        Scanner scanner = new Scanner(System.in);
        String name = scanner.nextLine();

        System.out.println("请输入你的身份：1：管理员  0：普通用户");
        int choice = scanner.nextInt();
        if(choice == 1){
            return new AdminUser(name);
        }else{
            return new NormalUser(name);
        }
    }
    //开始整合
    public static void main(String[] args) {
        //1.准备图书
        BookList bookList = new BookList();
        //2.登录
        User user = login();
        while(true){
            //3.根据登录的身份打印菜单 多态
            int choice = user.menu();
            user.doOperation(choice,bookList);
        }
    }
}