@Override
    public void onUserLoginAction_CallBack(int userId, String userName, IoSession session) {
        System.out.println("用户登陆->UserID:" + userId);
        IMUserDAO.onLine(userId,userName,session);
        NormalChatPackage ncp= new NormalChatPackage();
        ncp.setToUserID(userId);
        ncp.setBody("你已成功登陆服务器.");
        ncp.setToUsername(userName);
        ncp.setFromUserID(0);
        ncp.setFromUsername("服务器");
        ncp.setMsgDatetime(new Date());
        ncp.setType(Enums.ChatMsgType.Text);
        ncp.setToUsername(userName);
        String strObj= JSON.toJSONString(ncp);
        try {
           serverStarter.sendData(ncp.getFromUserID(),ncp.getToUserID(),strObj,true);
        } catch (Exception e) {

            e.printStackTrace();
            System.out.println(e.getMessage());
        }
    }

        // 将用户信息放入到在线列表中（理论上：每一个存放在在线列表中的session都对应了user_id）
private HashMap<Integer, IoSession> userSessions = new HashMap<Integer, IoSession>();
        private HashMap<Integer, String> userNames = new HashMap<Integer, String>();
                                                            UserProcessor.getInstance().putUser(user_id, session, loginInfo.getLoginName());
                                                            -----------------------------------------------------------------------------------------------------------------------
                                                                this.serverEventListener.onUserLoginAction_CallBack(user_id, loginInfo.getLoginName(), session);