用java写一个酒店管理系统

好的，我可以为您提供一个简单的酒店管理系统的Java代码示例，包括以下功能：

1. 房间预订
2. 房间取消预订
3. 显示所有房间信息
4. 显示空房间信息

代码如下：

Room.java

public class Room {
    private int roomNumber;
    private String roomType;
    private boolean isBooked;

    public Room(int roomNumber, String roomType) {
        this.roomNumber = roomNumber;
        this.roomType = roomType;
        this.isBooked = false;
    }

    public int getRoomNumber() {
        return roomNumber;
    }

    public String getRoomType() {
        return roomType;
    }

    public boolean isBooked() {
        return isBooked;
    }

    public void bookRoom() {
        this.isBooked = true;
    }

    public void cancelBooking() {
        this.isBooked = false;
    }
}

Hotel.java

import java.util.ArrayList;

public class Hotel {
    private String hotelName;
    private ArrayList<Room> rooms;

    public Hotel(String hotelName) {
        this.hotelName = hotelName;
        this.rooms = new ArrayList<Room>();
        initializeRooms();
    }

    private void initializeRooms() {
        for (int i = 1; i <= 10; i++) {
            if (i <= 5) {
                rooms.add(new Room(i, "Single"));
            } else {
                rooms.add(new Room(i, "Double"));
            }
        }
    }

    public void displayAllRooms() {
        System.out.println("Hotel Name: " + hotelName);
        System.out.println("Room Number\tRoom Type\tBooked");
        for (Room room : rooms) {
            System.out.println(room.getRoomNumber() + "\t\t" + room.getRoomType() + "\t\t" + room.isBooked());
        }
    }

    public void displayAvailableRooms() {
        System.out.println("Hotel Name: " + hotelName);
        System.out.println("Room Number\tRoom Type");
        for (Room room : rooms) {
            if (!room.isBooked()) {
                System.out.println(room.getRoomNumber() + "\t\t" + room.getRoomType());
            }
        }
    }

    public void bookRoom(int roomNumber) {
        for (Room room : rooms) {
            if (room.getRoomNumber() == roomNumber) {
                if (room.isBooked()) {
                    System.out.println("Room is already booked!");
                } else {
                    room.bookRoom();
                    System.out.println("Room " + roomNumber + " booked successfully!");
                }
                return;
            }
        }
        System.out.println("Invalid Room Number!");
    }

    public void cancelBooking(int roomNumber) {
        for (Room room : rooms) {
            if (room.getRoomNumber() == roomNumber) {
                if (!room.isBooked()) {
                    System.out.println("Room is not booked!");
                } else {
                    room.cancelBooking();
                    System.out.println("Booking for Room " + roomNumber + " cancelled successfully!");
                }
                return;
            }
        }
        System.out.println("Invalid Room Number!");
    }
}

Main.java

import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Hotel hotel = new Hotel("My Hotel");

        Scanner scanner = new Scanner(System.in);

        while (true) {
            System.out.println("\n\n1. Display All Rooms");
            System.out.println("2. Display Available Rooms");
            System.out.println("3. Book a Room");
            System.out.println("4. Cancel Booking");
            System.out.println("5. Exit");

            System.out.print("Enter your choice: ");
            int choice = scanner.nextInt();

            switch (choice) {
                case 1:
                    hotel.displayAllRooms();
                    break;
                case 2:
                    hotel.displayAvailableRooms();
                    break;
                case 3:
                    System.out.print("Enter room number to book: ");
                    int roomNumber = scanner.nextInt();
                    hotel.bookRoom(roomNumber);
                    break;
                case 4:
                    System.out.print("Enter room number to cancel booking: ");
                    int roomNumberToCancel = scanner.nextInt();
                    hotel.cancelBooking(roomNumberToCancel);
                    break;
                case 5:
                    scanner.close();
                    System.exit(0);
                default:
                    System.out.println("Invalid Choice!");
            }
        }
    }
}

这个酒店管理系统示例中，我们使用Room类来表示每个房间，并在Hotel类中管理它们。Main类包含一个简单的用户界面，允许用户执行不同的操作来管理酒店。您可以根据需要进行修改和扩展。