Method add

src/main/java/com/chen/LeoBlog/base/SocketPool.java:22–29

新增一则连接 @param keyId 设置主键 @param session 设置session

(Long keyId, Session session)

     * @param session 设置session
     */
    public static void add(Long keyId, Session session) {

        if (keyId!=null && session != null){
            //生成一个唯一的keyId
//            UUID uuid = UUID.randomUUID(true);
            ONLINE_USER_SESSIONS.put(keyId, session);
        }
    }

    /**
     * 根据Key删除连接