无法在Java websocket中获取当前客户端以外的打开会话。

import javax.websocket.*;
import javax.websocket.server.ServerEndpoint;
import java.util.ArrayList;
import java.util.List;

@ServerEndpoint("/websocket")
public class MyWebSocketEndpoint {

    private static List<Session> sessions = new ArrayList<>();

    @OnOpen
    public void onOpen(Session session) {
        sessions.add(session);
    }

    @OnClose
    public void onClose(Session session) {
        sessions.remove(session);
    }

    @OnError
    public void onError(Session session, Throwable error) {
        // 错误处理逻辑
    }

    @OnMessage
    public void onMessage(String message, Session session) {
        // 消息处理逻辑
    }

    public static List<Session> getOpenSessions() {
        return sessions;
    }

    public static List<Session> getOtherOpenSessions(Session currentSession) {
        List<Session> otherSessions = new ArrayList<>();
        for (Session session : sessions) {
            if (!session.getId().equals(currentSession.getId())) {
                otherSessions.add(session);
            }
        }
        return otherSessions;
    }
}