简易的java酒店管理系统

好的，下面是一个简易的Java酒店管理系统，包括客房管理、预订、入住和退房等功能：

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

public class HotelManagementSystem {
    private static ArrayList<Room> roomList = new ArrayList<>();
    private static Scanner scanner = new Scanner(System.in);

    public static void main(String[] args) {
        // 初始化房间信息
        for (int i = 1; i <= 10; i++) {
            roomList.add(new Room(i, "单人间", "空闲"));
        }
        for (int i = 11; i <= 20; i++) {
            roomList.add(new Room(i, "双人间", "空闲"));
        }

        while (true) {
            System.out.println();
            System.out.println("欢迎使用酒店管理系统！");
            System.out.println("1. 客房列表");
            System.out.println("2. 预订客房");
            System.out.println("3. 入住客房");
            System.out.println("4. 退房");
            System.out.println("5. 退出系统");
            System.out.print("请选择操作：");

            int choice = scanner.nextInt();
            switch (choice) {
                case 1:
                    printRoomList();
                    break;
                case 2:
                    reserveRoom();
                    break;
                case 3:
                    checkinRoom();
                    break;
                case 4:
                    checkoutRoom();
                    break;
                case 5:
                    System.out.println("谢谢使用酒店管理系统！");
                    System.exit(0);
                default:
                    System.out.println("无效操作，请重新选择！");
                    break;
            }
        }
    }

    // 打印客房列表
    private static void printRoomList() {
        System.out.println("客房列表：");
        for (Room room : roomList) {
            System.out.println(room);
        }
    }

    // 预订客房
    private static void reserveRoom() {
        System.out.print("请输入要预订的客房号码：");
        int roomId = scanner.nextInt();
        Room room = findRoom(roomId);
        if (room == null) {
            System.out.println("客房不存在！");
        } else if (room.getStatus().equals("预订") || room.getStatus().equals("入住")) {
            System.out.println("客房已被预订或入住！");
        } else {
            System.out.print("请输入预订人姓名：");
            String name = scanner.next();
            System.out.print("请输入预订日期：");
            String date = scanner.next();
            room.setReserve(name, date);
            System.out.println("预订成功！");
        }
    }

    // 入住客房
    private static void checkinRoom() {
        System.out.print("请输入要入住的客房号码：");
        int roomId = scanner.nextInt();
        Room room = findRoom(roomId);
        if (room == null) {
            System.out.println("客房不存在！");
        } else if (room.getStatus().equals("预订") || room.getStatus().equals("入住")) {
            System.out.println("客房已被预订或入住！");
        } else {
            System.out.print("请输入入住人姓名：");
            String name = scanner.next();
            System.out.print("请输入入住日期：");
            String date = scanner.next();
            room.setCheckin(name, date);
            System.out.println("入住成功！");
        }
    }

    // 退房
    private static void checkoutRoom() {
        System.out.print("请输入要退房的客房号码：");
        int roomId = scanner.nextInt();
        Room room = findRoom(roomId);
        if (room == null) {
            System.out.println("客房不存在！");
        } else if (room.getStatus().equals("空闲")) {
            System.out.println("客房未被预订或入住！");
        } else {
            System.out.print("请输入退房日期：");
            String date = scanner.next();
            room.setCheckout(date);
            System.out.println("退房成功！");
        }
    }

    // 根据房间号码查找房间
    private static Room findRoom(int roomId) {
        for (Room room : roomList) {
            if (room.getId() == roomId) {
                return room;
            }
        }
        return null;
    }
}

class Room {
    private int id;
    private String type;
    private String status;
    private String reserveName;
    private String reserveDate;
    private String checkinName;
    private String checkinDate;
    private String checkoutDate;

    public Room(int id, String type, String status) {
        this.id = id;
        this.type = type;
        this.status = status;
    }

    public int getId() {
        return id;
    }

    public String getType() {
        return type;
    }

    public String getStatus() {
        return status;
    }

    public String getReserveName() {
        return reserveName;
    }

    public String getReserveDate() {
        return reserveDate;
    }

    public String getCheckinName() {
        return checkinName;
    }

    public String getCheckinDate() {
        return checkinDate;
    }

    public String getCheckoutDate() {
        return checkoutDate;
    }

    // 设置预订信息
    public void setReserve(String name, String date) {
        reserveName = name;
        reserveDate = date;
        status = "预订";
    }

    // 设置入住信息
    public void setCheckin(String name, String date) {
        checkinName = name;
        checkinDate = date;
        status = "入住";
    }

    // 设置退房信息
    public void setCheckout(String date) {
        checkoutDate = date;
        reserveName = "";
        reserveDate = "";
        checkinName = "";
        checkinDate = "";
        status = "空闲";
    }

    @Override
    public String toString() {
        String str = "客房号码：" + id + "，类型：" + type + "，状态：" + status;
        if (status.equals("预订")) {
            str += "，预订人：" + reserveName + "，预订日期：" + reserveDate;
        } else if (status.equals("入住")) {
            str += "，入住人：" + checkinName + "，入住日期：" + checkinDate;
        } else if (status.equals("退房")) {
            str += "，退房日期：" + checkoutDate;
        }
        return str;
    }
}

这个系统使用了一个Room类来表示客房，包含了客房号码、客房类型、客房状态（空闲、预订或入住）以及客人的预订、入住和退房信息。HotelManagementSystem类则提供了一系列方法来实现客房管理、预订、入住和退房等功能。