webSocket实现多人对战抢答的任务

浅浅的花香味﹌ 2023-10-15 16:50 117阅读 0赞

最新要实现app答题对战的任务，准备用websocket去实现，查了百度也没参考，就自己写了写

实现 WebSocket 的抢答答题游戏可以按照以下步骤进行：

1.  设计数据结构：为了记录每个玩家的得分和答题情况，可以定义一个玩家类（Player）来存储相关信息，例如玩家姓名、得分等。同时，需要设计题目数据的结构，可以使用题目类（Question）来表示每个问题，包括问题内容和正确答案。后面加了房间信息（room）
2.  准备题目：在服务器端准备一系列的题目，并将其存储在列表或数组中。
3.  1v1 模式答题流程：
    
     *  等待两个玩家加入游戏并建立 WebSocket 连接。
     *  随机选择一道题目发送给玩家。
     *  如果有一个玩家回答问题，正确并将答案发送给服务器。错误，就让他等待，如果没人回答或者都答错了，就等待10s之后跳下一题
     *  如果答案正确，则给第一个玩家加一分，并通知两个玩家当前得分情况。游戏结束。
     *  如果答案错误，则将问题和答案传递给下一个玩家，并重复上述步骤，直到有玩家答对或所有玩家都答错。
4.  2v2 或多对多模式答题流程：
    
     *  等待足够数量的玩家加入并建立 WebSocket 连接。
     *  根据玩家人数随机分组，每个小组内玩家互为队友。
     *  随机选择一道题目发送给第一个小组的第一个玩家。
     *  第一个玩家回答问题，并将答案发送给服务器。
     *  如果答案正确，则给小组内所有玩家加一分，并通知所有玩家当前得分情况。游戏结束条件可根据实际需求设定。
     *  如果答案错误，则将问题和答案传递给下一个小组的第一个玩家，并重复上述步骤，直到有玩家答对或所有玩家都答错。

先创建对象：player 玩家信息

import lombok.Data;
    import javax.websocket.Session;
    import java.io.IOException;
    
    // Player 类表示参与游戏的玩家和相关信息
    @Data
    public class Player {
            private Session session;
            private String name;
            private int score;
            private GameQuestion currentQuestion;
            private boolean playing;
            //游戏类型
            private String mode;
            private String roomId;
            //是否回答过问题
            private boolean answered;
            private int currentQuestionIndex;
    
            public Player(Session session) {
                this.session = session;
                //this.name = "Player " + session.getId();
                this.name =  session.getRequestParameterMap().get("name").get(0);
                this.score = 0;
                this.playing = false;
                this.mode = session.getRequestParameterMap().get("mode").get(0);
                this.currentQuestionIndex = 0;
            }
    
            public Session getSession() {
                return session;
            }
    
            public String getName() {
                return name;
            }
    
            public int getScore() {
                return score;
            }
    
            public void setScore(int score) {
                this.score = score;
            }
    
            public GameQuestion getCurrentQuestion() {
                return currentQuestion;
            }
    
            public void setCurrentQuestion(GameQuestion currentQuestion) {
                this.currentQuestion = currentQuestion;
            }
    
            public boolean isPlaying() {
                return playing;
            }
    
            public void setPlaying(boolean playing) {
                this.playing = playing;
            }
    
    
    
            public void send(String message) throws IOException {
                session.getBasicRemote().sendText(message);
            }
    
            public void addScore() {
                score++;
            }
    }

room 房间信息

import lombok.Data;
    
    import javax.management.timer.Timer;
    import java.util.ArrayList;
    import java.util.List;
    
    /// Room 类表示游戏房间，包括玩家、题目、得分等信息
    @Data
    public class Room {
        private String roomName;
        private List<Player> players;
        private boolean started;
        private String mode; // 新增游戏模式字段
    
        private int currentQuestionIndex;
        private List<Question> questions;
        private Timer timer;
    
        public Room(String roomName) {
            this.roomName = roomName;
            this.players = new ArrayList<>();
            this.started = false;
            this.currentQuestionIndex = 0;
            this.questions = new ArrayList<>();
            this.timer = new Timer();
        }
    
    }

问题信息 question

import lombok.Data;
    
    // Question 类表示每个题目和对应答案
    @Data
    public class Question {
        private String content;
        private String answer;
    
        public Question(String content, String answer) {
            this.content = content;
            this.answer = answer;
        }
    
    }

import java.io.IOException;
    import java.util.ArrayList;
    import java.util.Collections;
    import java.util.HashMap;
    import java.util.List;
    import java.util.Map;
    import java.util.Random;
    import java.util.Timer;
    import java.util.TimerTask;
    
    import javax.websocket.OnClose;
    import javax.websocket.OnError;
    import javax.websocket.OnMessage;
    import javax.websocket.OnOpen;
    import javax.websocket.Session;
    import javax.websocket.server.ServerEndpoint;
    
    @ServerEndpoint("/game")
    public class Server {
        // 存储每个房间的玩家列表
        private static Map<String, List<Player>> rooms = new HashMap<>();
        // 存储每个玩家的答题状态和得分
        private static Map<Session, Player> players = new HashMap<>();
        // 存储问题
        private static List<Question> questions = new ArrayList<>();
    
        static {
            // 初始化一些题目
            questions.add(new Question("2+2=?", "4"));
            questions.add(new Question("3*7=?", "21"));
            questions.add(new Question("中国首都是？", "北京"));
        }
    
        @OnOpen
        public void onOpen(Session session) throws IOException {
            // 处理新玩家加入游戏的请求
            // 创建一个新的Player对象，并将其与session关联
            Player player = new Player(session);
            players.put(session, player);
    
            System.out.println("New player joined: " + player.getName());
    
            // 获取可加入的房间列表
            List<String> availableRooms = getAvailableRooms();
            if (availableRooms.isEmpty()) {
                // 如果没有可加入的房间，则创建新房间
                String roomId = createRoom();
                player.setRoomId(roomId);
                System.out.println("New room created: " + roomId);
                player.send("You created a new room: " + roomId);
            } else {
                // 加入第一个可加入的房间
                String roomId = availableRooms.get(0);
                player.setRoomId(roomId);
                System.out.println("Player joined room: " + roomId);
                player.send("You joined room: " + roomId);
    
                // 检查房间是否已满，如果已满则开始游戏
                if (isRoomFull(roomId)) {
                    startGame(roomId);
                }
            }
        }
    
        @OnClose
        public void onClose(Session session) throws IOException {
            // 处理玩家离开游戏的请求
            // 从players中移除离开的玩家，并检查房间是否需要解散
            Player player = players.get(session);
            players.remove(session);
            if (player != null) {
                leaveRoom(player);
            }
            System.out.println("Player left: " + player.getName());
        }
    
        @OnError
        public void onError(Throwable throwable) {
            // 处理WebSocket错误
            System.err.println("WebSocket error: " + throwable.getMessage());
        }
    
        @OnMessage
        public void onMessage(Session session, String message) throws IOException {
            // 处理玩家答题的请求
            Player player = players.get(session);
            if (player != null && player.isPlaying() && !player.isAnswered()) {
                Question currentQuestion = player.getCurrentQuestion();
                if (message.equals(currentQuestion.getAnswer())) {
                    // 答案正确，增加玩家分数，并广播当前得分情况
                    player.addScore();
                    broadcastScores(player.getRoomId());
                    player.setAnswered(true);
                    player.send("Correct! Your score is now " + player.getScore());
    
                    // 检查是否所有玩家都已经答过题
                    if (areAllPlayersAnswered(player.getRoomId())) {
                        checkGameOver(player.getRoomId());
                    }
                } else {
                    // 答案错误，提示下一个玩家答题
                    player.send("Wrong answer, please wait for the next question.");
                    passQuestion(player.getRoomId());
                }
            }
        }
    
        private List<String> getAvailableRooms() {
            // 获取当前可加入的房间列表
            List<String> availableRooms = new ArrayList<>();
            for (String roomId : rooms.keySet()) {
                if (!isRoomFull(roomId)) {
                    availableRooms.add(roomId);
                }
            }
            return availableRooms;
        }
    
        private boolean isRoomFull(String roomId) {
            // 检查房间是否已满
            List<Player> roomPlayers = rooms.get(roomId);
            return roomPlayers != null && roomPlayers.size() >= 2;
        }
    
        private String createRoom() {
            // 创建新的房间
            String roomId = generateRoomId();
            rooms.put(roomId, new ArrayList<>());
            return roomId;
        }
    
        private String generateRoomId() {
            // 生成唯一的房间ID
            String roomId;
            do {
                // 随机生成4位数的字符串作为房间ID
                roomId = String.format("%04d", new Random().nextInt(10000));
            } while (rooms.containsKey(roomId));
            return roomId;
        }
    
        private void leaveRoom(Player player) throws IOException {
            // 离开房间，并检查房间是否需要解散
            String roomId = player.getRoomId();
            List<Player> roomPlayers = rooms.get(roomId);
            roomPlayers.remove(player);
            System.out.println("Player left room: " + roomId);
    
            // 如果离开的是最后一个玩家，则解散房间
            if (roomPlayers.isEmpty()) {
                rooms.remove(roomId);
                System.out.println("Room dissolved: " + roomId);
            } else {
                if (player.isPlaying() && !player.isAnswered()) {
                    // 如果离开的玩家正在答题中且未回答，则传递问题给下一个玩家
                    passQuestion(roomId);
                }
                // 广播当前得分情况
                broadcastScores(roomId);
            }
        }
    
        private void startGame(String roomId) throws IOException {
            // 开始游戏，发送第一个题目给每个玩家
            List<Player> roomPlayers = rooms.get(roomId);
            List<Question> gameQuestions = new ArrayList<>(questions);
            Collections.shuffle(gameQuestions);
            for (int i = 0; i < roomPlayers.size(); i++) {
                Player player = roomPlayers.get(i);
                player.setPlaying(true);
                player.setScore(0);
                player.setCurrentQuestion(gameQuestions.get(i));
                player.setAnswered(false);
                player.send("Game started! Answer this question: " + gameQuestions.get(i).getContent());
            }
            // 启动定时器，10秒内没有玩家答题则自动进入下一题
            Timer timer = new Timer();
            timer.schedule(new TimerTask() {
                @Override
                public void run() {
                    if (areAllPlayersAnswered(roomId)) {
                        checkGameOver(roomId);
                    } else {
                        passQuestion(roomId);
                    }
                }
            }, 10000);
        }
    
        private void passQuestion(String roomId) throws IOException {
            // 将问题传递给下一个玩家
            List<Player> roomPlayers = rooms.get(roomId);
            Player currentPlayer = getCurrentPlayer(roomPlayers);
            currentPlayer.setAnswered(true);
            int nextIndex = (roomPlayers.indexOf(currentPlayer) + 1) % roomPlayers.size();
            Player nextPlayer = roomPlayers.get(nextIndex);
            nextPlayer.setPlaying(true);
            nextPlayer.setCurrentQuestion(currentPlayer.getCurrentQuestion());
            nextPlayer.setAnswered(false);
            nextPlayer.send("Answer this question: " + currentPlayer.getCurrentQuestion().getContent());
        }
    
        private void checkGameOver(String roomId) throws IOException {
            // 检查游戏是否结束
            List<Player> roomPlayers = rooms.get(roomId);
            boolean allAnswered = true;
            for (Player player : roomPlayers) {
                if (!player.isAnswered()) {
                    allAnswered = false;
                    break;
                }
            }
            if (allAnswered) {
                // 所有玩家都已答题完毕，比较分数并广播结果
                List<Player> winners = getWinners(roomPlayers);
                String message;
                if (winners.isEmpty()) {
                    message = "Game over! It's a tie.";
                } else {
                    message = "Game over! Winners: ";
                    for (Player winner : winners) {
                        message += winner.getName() + "(" + winner.getScore() + " points) ";
                    }
                }
                for (Player player : roomPlayers) {
                    player.send(message);
                }
            }
        }
    
        private List<Player> getWinners(List<Player> players) {
            // 获取分数最高的玩家
            List<Player> winners = new ArrayList<>();
            int maxScore = 0;
            for (Player player : players) {
                int score = player.getScore();
                if (score > maxScore) {
                    maxScore = score;
                    winners.clear();
                    winners.add(player);
                } else if (score == maxScore) {
                    winners.add(player);
                }
            }
            return winners;
        }
    
        private boolean areAllPlayersAnswered(String roomId) {
            // 检查是否所有玩家都已经答过题
            List<Player> roomPlayers = rooms.get(roomId);
            for (Player player : roomPlayers) {
                if (!player.isAnswered()) {
                    return false;
                }
            }
            return true;
        }
    
        private void broadcastScores(String roomId) throws IOException {
            // 广播当前得分情况
            List<Player> roomPlayers = rooms.get(roomId);
            String scoreMessage = "Current scores: ";
            for (Player player : roomPlayers) {
                scoreMessage += player.getName() + "(" + player.getScore() + " points) ";
            }
            for (Player player : roomPlayers) {
                player.send(scoreMessage);
            }
        }
    
        private Player getCurrentPlayer(List<Player> players) {
            // 获取当前回答问题的玩家
            for (Player player : players) {
                if (!player.isAnswered()) {
                    return player;
                }
            }
            return players.get(0);
        }
    }

提供的这个demo发送问题是一个一个发送的，可以把player.send的地方修改一下，修改成全部人一起抢答一题，然后谁先答对就全部通知，然后刷新下一题。