Java websocket + redis 实现多人单聊天室，多人多聊天室， 一对一聊天_websocket 多人协同 java 多节点redis会话

@ServerEndpoint(value="/websocketServer", configurator=SpringConfigurator.class, encoders = { CommonMessageEncoder.class, SystemMessageEncoder.class, HistoryMessageEncoder.class})
public class WebsocketServer {
	//存储每个客户端对应的websocketServer实例与登录名map
    private static CopyOnWriteMap<WebsocketServer, String> webSocketUsernameMap = new CopyOnWriteMap<WebsocketServer, String>();
    
    private MessageDao messageDao = (MessageDao)ContextLoader.getCurrentWebApplicationContext().getBean("messageDao");
    
    //在线成员
    private static ConcurrentLinkedQueue<String> members = new ConcurrentLinkedQueue<String>();
 
    //每个webscoket客户端与服务器会话
    private Session session;
    
    public WebsocketServer() {
    }
    
    @OnOpen
    public void onOpen(Session session) {
        this.session = session;
    }
    
    @OnClose
    public void onClose() {
        String username = webSocketUsernameMap.get(this);
        removeMember(username);
        webSocketUsernameMap.remove(this);
        
        for (WebsocketServer webSocket : webSocketUsernameMap.keySet()) {
            try {
                sendMsg(webSocket, new SystemMessageResponse(MessageType.SYS_MSG, username, "exit", members));
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    }
    
    @OnMessage
    public void onMessage(String message, Session session) {
    	JSONObject messageObject = new JSONObject(message);
    	String type = messageObject.getString("messageType");
    	String content = messageObject.getString("message");
    	
    	if (type.equals(MessageType.COM_MSG)) {
            //群发消息
    		Date time = new Date();
    		Sim