图书管理系统

package com.day01;

import java.util.ArrayList;
import java.util.Scanner;

public class Booksystem {
    static ArrayList<Books> libraries = new ArrayList<Books>();
    static ArrayList<Books> Usersbooks = new ArrayList<Books>();
    public static void main(String[] args) {
        Circulate: while (true) {

            System.out.println("——————————欢迎来到懒洋洋的图书管理系统——————————");
            System.out.println("请选择：1.登录");
            System.out.println("请选择：2.退出");
            Scanner scanner = new Scanner(System.in);
            String choice = scanner.nextLine();
            switch (choice) {
                case "1":
                         Login();
                    break;
                case "2":
                    break Circulate;
                default:
                    System.out.println("输入错误，请在输入一次");
            }
        }
    }
    public static void Login()
    {
        System.out.println("请选择1.管理员登录");
        System.out.println("请选择2.用户登录");
        Scanner scanner = new Scanner(System.in);
        String choice = scanner.nextLine();
        switch (choice) {
            case "1"-> BossLogin();
            case "2"->UsersLogin();
        }
    }
    public static void BossLogin() {
        Boss boss = new Boss();
        while (true) {
            System.out.println("请输入管理员的用户名");
            Scanner scanner = new Scanner(System.in);
            String Bossname = scanner.nextLine();
            System.out.println("请输入管理员的密码");
            String password = scanner.nextLine();
            if (Bossname.equals(boss.getName()) && password.equals(boss.getPassword())) {
                System.out.println("欢迎您！亲爱的管理员");
                BossChoice();
                break;
            } else {
                System.out.println("您的用户名或密码输入错误，请在输入一次");
            }
        }
    }
    public static void UsersLogin()
    {
        Users user = new Users();
        while(true) {
            System.out.println("请输入用户的用户名");
            Scanner scanner = new Scanner(System.in);
            String Usersname = scanner.nextLine();
            System.out.println("请输入用户的密码");
            String password = scanner.nextLine();
            if (Usersname.equals(user.getName()) && password.equals(user.getPassword())) {
                System.out.println("欢迎您！亲爱的用户");
                UserChoice();
                break;
            } else {
                System.out.println("您的用户名或密码输入错误，请在输入一次");
            }
        }
    }
    public static void UserChoice()
    {
        System.out.println("亲爱的用户，请选择你的操作");
        System.out.println("1.查看图书馆里所有书");
        System.out.println("2.我要借书了！");
        System.out.println("3.我要还书了");
        System.out.println("4.我要对书进行评价");
        System.out.println("5.退出");
        Scanner scanner = new Scanner(System.in);
        String choice = scanner.nextLine();
        switch (choice) {
            case "1"->UserBookSawAll(libraries);
            case"2"->BorrowBook();
            case"3"->Returnbook();
            case"4"->Appraisebook();
            case"5"->Login();
        }
    }
    public static void UserBookSawAll(ArrayList<Books> libraries)
    {
        for (int i = 0; i <libraries.size() ; i++) {
            System.out.println(libraries.get(i).getId()+" "+libraries.get(i).getName()+" "+libraries.get(i).getAuthor());
        }
        System.out.println("查看完毕 返回主页面");
        UserChoice();
    }
    public static void BorrowBook()
    {
        System.out.println("请输入你要所要借书的id");
        Scanner scanner = new Scanner(System.in);
       int id = scanner.nextInt();
        Usersbooks.add(libraries.get(id));
        libraries.remove(id-1);
        System.out.println("恭喜你，借书完毕，即将返回主页面");
        UserChoice();
    }
    public static void Returnbook()
    {
        System.out.println("请输入你要所要借书的id");
        Scanner scanner = new Scanner(System.in);
        int id = scanner.nextInt();
        libraries.add(Usersbooks.get(id));
        Usersbooks.remove(id);
        System.out.println();
        System.out.println("恭喜你，还书完毕，即将返回主页面");
        UserChoice();

    }
    public static void Appraisebook()
    {
        Scanner scanner = new Scanner(System.in);
        System.out.println("请输入要评价书的id");
        int id = scanner.nextInt();
        System.out.println("请输入对书的评论");
        String appraise=scanner.nextLine();
        System.out.println("我对"+libraries.get(id)+"的评价是"+appraise);

    }
    public static void BossChoice()
    {
        System.out.println("亲爱的管理员，请选择你的操作");
        System.out.println("1.录入书籍");
        System.out.println("2.移除书籍");
        System.out.println("3.查看所有书籍");
        System.out.println("4.查看所有用户借的书");
        System.out.println("5.禁止用户登录");
        System.out.println("6.退出登录并返回主界面");
        Scanner scanner = new Scanner(System.in);
        String choice = scanner.nextLine();
        switch (choice) {
            case "1"->BookInput();
            case"2"-> BookRemove(libraries);
            case "3"->BookSeeAll(libraries);
            case"4"-> BossSawUser(Usersbooks);
            case"5"->Stopusers();
            case"6"->Login();
        }
    }
    public static void BookInput()
    {
        String choose="";
        do {
            Books book = new Books();
            System.out.println("请输入这本书的id");
            Scanner scanner = new Scanner(System.in);
            String Bookid = scanner.nextLine();
            book.setId(Bookid);
            System.out.println("请输入这本书的名字");
            String Bookname = scanner.nextLine();
            book.setName(Bookname);
            System.out.println("请输入这本书的作者");
            String Bookauthor = scanner.nextLine();
            book.setAuthor(Bookauthor);
            libraries.add(book);
            System.out.println("添加成功");
            System.out.println("您是否还想添加书？");
            System.out.println("请输入y/n");
            choose = scanner.nextLine();
        }
        while (choose.equals("y"));
        BossChoice();

    }
    public static void BookRemove(ArrayList<Books> libraries) {
        int flage=1;
        System.out.println("请输入你要删除书的id");
        Scanner scanner = new Scanner(System.in);
        String Bookid = scanner.nextLine();
        for (int i = 0; i < libraries.size(); i++) {
            if (libraries.get(i).getId().equals(Bookid)) {
                libraries.remove(i);
                System.out.println("恭喜你，删除成功");
                flage=0;
            }
        }
        if(flage==1)
        {
            System.out.println("您要删除的书不存在");
        }
        BossChoice();
    }
    public static void BookSeeAll(ArrayList<Books> libraries){
        for (int i = 0; i <libraries.size() ; i++) {
            System.out.println(libraries.get(i).getId()+" "+libraries.get(i).getName()+" "+libraries.get(i).getAuthor());
        }
        BossChoice();
    }
    public static void BossSawUser(ArrayList<Books> Usersbooks)
    {
        for (int i = 0; i < Usersbooks.size() ; i++) {
            System.out.println(Usersbooks.get(i).getId()+" "+Usersbooks.get(i).getName()+" "+Usersbooks.get(i).getAuthor());
        }
    }
    public static void Stopusers()
    {
        System.out.println("您已经开启禁止用户登陆权限");

    }
}