JAVA。图书管理系统主类报错，该如何修改？

JAVA。图书管理系统，报错如下，请问是什么问题呢？该怎么解决呢？

package cn.edu.xxx.blms;

import cn.edu.xxx.blms.service.BookService;

import java.util.Scanner;

/**时间:
 * 作者:
 * 图书管理系统主类
 */
public class App {
    /**
     * 输入扫描器
     */
    public static Scanner input;

    /**
     * 程序启动
     */
    public void run() {
        input = new Scanner(System.in);
        String systemMenuChoice;
        do {
            systemMenu();
            systemMenuChoice = input.nextLine();
            switch (systemMenuChoice) {
                case "0":
                    System.out.println("成功退出系统，欢迎再次使用！");
                    break;
                case "1":
                    String readerMenuChoice;
                    do {
                        readerMenu();
                        readerMenuChoice = input.nextLine();
                        switch (readerMenuChoice) {
                            case "0":
                                break;
                            case "1":
                                readerService.create();
                                break;
                            case "2":
                                readerService.disable();
                                break;
                            case "3":
                                readerService.update();
                                break;
                            case "4":
                                readerService.query();
                                break;
                            default:
                                System.out.println("输入非法，请输入正确的菜单编号！");
                        }
                    }while(!("0").equals(readerMenuChoice));
                    break;
                case "2":
                    String bookMenuChoice;
                    do {
                        bookMenu();
                        bookMenuChoice = input.nextLine();
                        switch (bookMenuChoice) {
                            case "0":
                                break;
                            case "1":
                                bookService.create();
                                break;
                            case "2":
                                bookService.disable();
                                break;
                            case "3":
                                bookService.update();
                                break;
                            case "4":
                                bookService.query();
                                break;
                            default:
                                System.out.println("输入非法，请输入正确的菜单编号！");
                        }
                    } while(!("0").equals(bookMenuChoice));
                    break;
                case "3":
                    //TODO：实现借还图书菜单交互
                    String borrowingMenuChoice;
                    do {
                        borrowingMenu();
                        borrowingMenuChoice = input.nextLine();
                        switch (borrowingMenuChoice) {
                            case "0":
                                break;
                            case "1":
                                //TODO:借阅图书
                                break;
                            case "2":
                                //TODO：归还图书
                                break;
                            case "3":
                                //TODO：查询记录
                                break;
                            default:
                                System.out.println("输入非法，请输入正确的菜单编号！");
                        }
                    }while(!("0").equals(borrowingMenuChoice));
                    break;
                default:
                    System.out.println("输入非法，请输入正确的菜单编号！");
            }
        }
        while (!"0".equals(systemMenuChoice)) ;
        input.close();
    }
    public void systemMenu() {
        System.out.println("----------------------------");
        System.out.println("          图书管理系统         ");
        System.out.println("-----------------------------");
        System.out.println("｜         0...退出系统       ｜");
        System.out.println("｜         1...读者管理       ｜");
        System.out.println("｜         0...图书管理       ｜");
        System.out.println("｜         0...借还图书       ｜");
        System.out.println("-----------------------------");
        System.out.print("请输入选项：");
    }
    /**
     * 输出读者管理菜单
     */
    public void readerMenu() {
        System.out.println("----------------------------");
        System.out.println("           读者管理           ");
        System.out.println("-----------------------------");
        System.out.println("｜         0...返回上级       ｜");
        System.out.println("｜         1...添加读者       ｜");
        System.out.println("｜         2...禁用读者       ｜");
        System.out.println("｜         3...编辑读者       ｜");
        System.out.println("｜         4...查询读者       ｜");
        System.out.println("-----------------------------");
        System.out.print("请输入选项：");
    }
    /**
     * 输出图书管理菜单
     */
    public void bookMenu() {
        System.out.println("----------------------------");
        System.out.println("           图书管理           ");
        System.out.println("-----------------------------");
        System.out.println("｜        0...返回上级       ｜");
        System.out.println("｜        1...添加图书       ｜");
        System.out.println("｜        2...废弃图书       ｜");
        System.out.println("｜        3...编辑图书       ｜");
        System.out.println("｜        4...查询图书       ｜");
        System.out.println("-----------------------------");
        System.out.print("请输入选项：");
    }
    /**
     * 输出借还图书菜单
     */
    public void borrowingMenu() {
        System.out.println("----------------------------");
        System.out.println("           借还图书           ");
        System.out.println("-----------------------------");
        System.out.println("｜         0...返回上级       ｜");
        System.out.println("｜         1...借阅图书       ｜");
        System.out.println("｜         2...归还图书       ｜");
        System.out.println("｜         3...查询记录       ｜");
        System.out.println("-----------------------------");
        System.out.print("请输入选项：");
    }
    public static void main(String[] args) {
        App app = new App();
        app.run();

    }
    public ReaderService readerService;

    public BookService bookService;

    public App(ReaderService readerService, BookService bookService){
        this.readerService = readerService;
        this.bookService = bookService;
    }

    public static void main(String[] args){
        App app = new App(new ReaderService(),new BookService());
        app.run();
    }

}

你的 ReaderService 类没有导进来