简单效果图

群聊，私聊，广播都可以支持。

基础概念：

• springboot
• netty-socketio
• WebSocket

POM文件：

 <?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"><modelVersion>4.0.0</modelVersion><artifactId>spring-boot-demo-websocket-socketio</artifactId><version>1.0.0-SNAPSHOT</version><packaging>jar</packaging><name>spring-boot-demo-websocket-socketio</name><description>Demo project for Spring Boot</description><parent><groupId>com.xkcoding</groupId><artifactId>spring-boot-demo</artifactId><version>1.0.0-SNAPSHOT</version></parent><properties><project.build.sourceEncoding>UTF-8</project.build.sourceEncoding><project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding><java.version>1.8</java.version><netty-socketio.version>1.7.16</netty-socketio.version></properties><dependencies><dependency><groupId>com.corundumstudio.socketio</groupId><artifactId>netty-socketio</artifactId><version>${netty-socketio.version}</version></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-web</artifactId></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-configuration-processor</artifactId><optional>true</optional></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-test</artifactId><scope>test</scope></dependency><dependency><groupId>cn.hutool</groupId><artifactId>hutool-all</artifactId></dependency><dependency><groupId>org.projectlombok</groupId><artifactId>lombok</artifactId><optional>true</optional></dependency></dependencies><build><finalName>spring-boot-demo-websocket-socketio</finalName><plugins><plugin><groupId>org.springframework.boot</groupId><artifactId>spring-boot-maven-plugin</artifactId></plugin></plugins></build></project>

websocket服务器配置

/*** <p>* websocket服务器配置* </p>*/
@Configuration
@EnableConfigurationProperties({WsConfig.class})
public class ServerConfig {@Beanpublic SocketIOServer server(WsConfig wsConfig) {com.corundumstudio.socketio.Configuration config = new com.corundumstudio.socketio.Configuration();config.setHostname(wsConfig.getHost());config.setPort(wsConfig.getPort());//这个listener可以用来进行身份验证config.setAuthorizationListener(data -> {// http://localhost:8081?token=xxxxxxx// 例如果使用上面的链接进行connect，可以使用如下代码获取用户密码信息，本文不做身份验证String token = data.getSingleUrlParam("token");// 校验token的合法性，实际业务需要校验token是否过期等等，参考 spring-boot-demo-rbac-security 里的 JwtUtil// 如果认证不通过会返回一个 Socket.EVENT_CONNECT_ERROR 事件return StrUtil.isNotBlank(token);});return new SocketIOServer(config);}/*** Spring 扫描自定义注解*/@Beanpublic SpringAnnotationScanner springAnnotationScanner(SocketIOServer server) {return new SpringAnnotationScanner(server);}
}

核心事件处理类

/*** <p>* 消息事件处理* </p>*/
@Component
@Slf4j
public class MessageEventHandler {@Autowiredprivate SocketIOServer server;@Autowiredprivate DbTemplate dbTemplate;/*** 添加connect事件，当客户端发起连接时调用** @param client 客户端对象*/@OnConnectpublic void onConnect(SocketIOClient client) {if (client != null) {String token = client.getHandshakeData().getSingleUrlParam("token");// 模拟用户id 和token一致String userId = client.getHandshakeData().getSingleUrlParam("token");UUID sessionId = client.getSessionId();dbTemplate.save(userId, sessionId);log.info("连接成功,【token】= {},【sessionId】= {}", token, sessionId);} else {log.error("客户端为空");}}/*** 添加disconnect事件，客户端断开连接时调用，刷新客户端信息** @param client 客户端对象*/@OnDisconnectpublic void onDisconnect(SocketIOClient client) {if (client != null) {String token = client.getHandshakeData().getSingleUrlParam("token");// 模拟用户id 和token一致String userId = client.getHandshakeData().getSingleUrlParam("token");UUID sessionId = client.getSessionId();dbTemplate.deleteByUserId(userId);log.info("客户端断开连接,【token】= {},【sessionId】= {}", token, sessionId);client.disconnect();} else {log.error("客户端为空");}}/*** 加入群聊** @param client  客户端* @param request 请求* @param data    群聊*/@OnEvent(value = Event.JOIN)public void onJoinEvent(SocketIOClient client, AckRequest request, JoinRequest data) {log.info("用户：{} 已加入群聊：{}", data.getUserId(), data.getGroupId());client.joinRoom(data.getGroupId());server.getRoomOperations(data.getGroupId()).sendEvent(Event.JOIN, data);}@OnEvent(value = Event.CHAT)public void onChatEvent(SocketIOClient client, AckRequest request, SingleMessageRequest data) {Optional<UUID> toUser = dbTemplate.findByUserId(data.getToUid());if (toUser.isPresent()) {log.info("用户 {} 刚刚私信了用户 {}：{}", data.getFromUid(), data.getToUid(), data.getMessage());sendToSingle(toUser.get(), data);client.sendEvent(Event.CHAT_RECEIVED, "发送成功");} else {client.sendEvent(Event.CHAT_REFUSED, "发送失败，对方不想理你");}}@OnEvent(value = Event.GROUP)public void onGroupEvent(SocketIOClient client, AckRequest request, GroupMessageRequest data) {Collection<SocketIOClient> clients = server.getRoomOperations(data.getGroupId()).getClients();boolean inGroup = false;for (SocketIOClient socketIOClient : clients) {if (ObjectUtil.equal(socketIOClient.getSessionId(), client.getSessionId())) {inGroup = true;break;}}if (inGroup) {log.info("群号 {} 收到来自 {} 的群聊消息：{}", data.getGroupId(), data.getFromUid(), data.getMessage());sendToGroup(data);} else {request.sendAckData("请先加群！");}}/*** 单聊*/public void sendToSingle(UUID sessionId, SingleMessageRequest message) {server.getClient(sessionId).sendEvent(Event.CHAT, message);}/*** 广播*/public void sendToBroadcast(BroadcastMessageRequest message) {log.info("系统紧急广播一条通知：{}", message.getMessage());for (UUID clientId : dbTemplate.findAll()) {if (server.getClient(clientId) == null) {continue;}server.getClient(clientId).sendEvent(Event.BROADCAST, message);}}/*** 群聊*/public void sendToGroup(GroupMessageRequest message) {server.getRoomOperations(message.getGroupId()).sendEvent(Event.GROUP, message);}
}

websocket 服务器启动类

/*** <p>* websocket服务器启动* </p>** @author yangkai.shen* @date Created in 2018-12-18 17:07*/
@Component
@Slf4j
public class ServerRunner implements CommandLineRunner {@Autowiredprivate SocketIOServer server;@Overridepublic void run(String... args) {server.start();log.info("websocket 服务器启动成功。。。");}
}