spring boot整合WebSocket实现多人聊天室的实例

package com.example.websocketdemo.controller; import com.example.websocketdemo.model.ChatMessage; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.context.event.EventListener; import org.springframework.messaging.simp.SimpMessageSendingOperations; import org.springframework.messaging.simp.stomp.StompHeaderAccessor; import org.springframework.stereotype.Component; import org.springframework.web.socket.messaging.SessionConnectedEvent; import org.springframework.web.socket.messaging.SessionDisconnectEvent; /** * Created by rajeevkumarsingh on 25/07/17. */ @Component public class WebSocketEventListener { private static final Logger logger = LoggerFactory.getLogger(WebSocketEventListener.class); @Autowired private SimpMessageSendingOperations messagingTemplate; @EventListener public void handleWebSocketConnectListener(SessionConnectedEvent event) { logger.info("Received a new web socket connection"); } @EventListener public void handleWebSocketDisconnectListener(SessionDisconnectEvent event) { StompHeaderAccessor headerAccessor = StompHeaderAccessor.wrap(event.getMessage()); String username = (String) headerAccessor.getSessionAttributes().get("username"); if(username != null) { logger.info("User Disconnected : " + username); ChatMessage chatMessage = new ChatMessage(); chatMessage.setType(ChatMessage.MessageType.LEAVE); chatMessage.setSender(username); messagingTemplate.convertAndSend("/topic/public", chatMessage); } } }