java简易酒店管理系统

以下是一个简单的Java酒店管理系统的实现，包括房间预定、退房和查询房间状态等功能：

import java.util.Scanner;

public class Hotel {
    private Room[][] rooms; // 酒店房间数组
    private int totalRooms; // 酒店总房间数
    private int reservedRooms; // 预定的房间数

    // 构造方法，初始化酒店房间数组
    public Hotel(int rows, int cols) {
        rooms = new Room[rows][cols];
        for (int i = 0; i < rows; i++) {
            for (int j = 0; j < cols; j++) {
                rooms[i][j] = new Room((i + 1) * 100 + (j + 1)); // 给每个房间编号
            }
        }
        totalRooms = rows * cols;
        reservedRooms = 0;
    }

    // 预定房间
    public void reserveRoom(int roomNum) {
        int row = (roomNum / 100) - 1;
        int col = (roomNum % 100) - 1;
        if (rooms[row][col].isAvailable()) {
            rooms[row][col].reserve();
            reservedRooms++;
            System.out.println("预定成功！");
        } else {
            System.out.println("该房间已被预定，请选择其他房间！");
        }
    }

    // 退房
    public void checkout(int roomNum) {
        int row = (roomNum / 100) - 1;
        int col = (roomNum % 100) - 1;
        if (!rooms[row][col].isAvailable()) {
            rooms[row][col].checkout();
            reservedRooms--;
            System.out.println("退房成功！");
        } else {
            System.out.println("该房间未被预定，无法退房！");
        }
    }

    // 查询房间状态
    public void checkRoomStatus(int roomNum) {
        int row = (roomNum / 100) - 1;
        int col = (roomNum % 100) - 1;
        if (rooms[row][col].isAvailable()) {
            System.out.println("该房间未被预定！");
        } else {
            System.out.println("该房间已被预定！");
        }
    }

    // 显示酒店房间状态
    public void displayRoomStatus() {
        System.out.println("酒店房间状态：");
        for (int i = 0; i < rooms.length; i++) {
            for (int j = 0; j < rooms[i].length; j++) {
                System.out.print(rooms[i][j].getRoomNum() + ": ");
                if (rooms[i][j].isAvailable()) {
                    System.out.println("空闲");
                } else {
                    System.out.println("已预定");
                }
            }
        }
        System.out.println("总房间数：" + totalRooms);
        System.out.println("已预定房间数：" + reservedRooms);
        System.out.println("空闲房间数：" + (totalRooms - reservedRooms));
    }

    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        Hotel hotel = new Hotel(5, 5); // 创建一个5行5列的酒店
        while (true) {
            System.out.println("请选择操作：");
            System.out.println("1. 预定房间");
            System.out.println("2. 退房");
            System.out.println("3. 查询房间状态");
            System.out.println("4. 显示酒店房间状态");
            System.out.println("5. 退出");
            int choice = scanner.nextInt();
            switch (choice) {
                case 1:
                    System.out.println("请输入要预定的房间号：");
                    int roomNum = scanner.nextInt();
                    hotel.reserveRoom(roomNum);
                    break;
                case 2:
                    System.out.println("请输入要退房的房间号：");
                    roomNum = scanner.nextInt();
                    hotel.checkout(roomNum);
                    break;
                case 3:
                    System.out.println("请输入要查询的房间号：");
                    roomNum = scanner.nextInt();
                    hotel.checkRoomStatus(roomNum);
                    break;
                case 4:
                    hotel.displayRoomStatus();
                    break;
                case 5:
                    System.exit(0);
                default:
                    System.out.println("无效的选择！");
            }
        }
    }
}

class Room {
    private int roomNum; // 房间号
    private boolean available; // 房间是否空闲

    public Room(int roomNum) {
        this.roomNum = roomNum;
        available = true;
    }

    public int getRoomNum() {
        return roomNum;
    }

    public boolean isAvailable() {
        return available;
    }

    public void reserve() {
        available = false;
    }

    public void checkout() {
        available = true;
    }
}