如果我不明白你的问题，请纠正我。你检查过org.jivesoftware.openfire.user.presenceeventlistener接口吗？例如，我实现了该接口：

public class CustomPresenceEventListener implements PresenceEventListener {

private static final Logger LOG = LoggerFactory.getLogger(CustomPresenceEventListener.class);

@Override
public void availableSession(ClientSession session, Presence presence) {
    LOG.info("\n\n=======SESSION AVAILABLE=========\n");
    try {
        LOG.info("USER : {}", session.getUsername());
    } catch (UserNotFoundException e) {
        LOG.info(e.getMessage(), e);
    }
    LOG.info("\n================\n\n");
}

@Override
public void unavailableSession(ClientSession session, Presence presence) {
    LOG.info("\n\n=======SESSION UNAVAILABLE=========\n");
    try {
        LOG.info("USER : {}", session.getUsername());
    } catch (UserNotFoundException e) {
        LOG.info(e.getMessage(), e);
    }
    LOG.info("\n================\n\n");
}

@Override
public void presenceChanged(ClientSession session, Presence presence) {
}

@Override
public void subscribedToPresence(JID subscriberJID, JID authorizerJID) {

}

@Override
public void unsubscribedToPresence(JID unsubscriberJID, JID recipientJID) {

}

并使用以下命令添加/删除此侦听器：

PresenceEventDispatcher.addListener(presenceEventListener);
PresenceEventDispatcher.removeListener(presenceEventListener);

当我连接到openfire时，我会在info.log文件中看到类似的内容：==========会话可用========2017.03.29 14:27:01.custompresenceeventlistener-user:25

2017.03.29 14:27:01.CustomPresence事件监听器-

当我离开openfire时，日志将是：==========会话不可用===========2017.03.29 14:27:34.custompresenceeventlistener-用户：25

2017.03.29 14:27:34.CustomPresence事件监听器-

所以当用户进入/离开openfire时，您可以添加任何想要的操作。