// 毫秒级

qint64 timestamp = QDateTime::currentMSecsSinceEpoch();

//秒级

qint64 timestamp = QDateTime::currentSecsSinceEpoch()

//秒级

time(NULL)

// 时间戳转时间

QDateTime time2 = QDateTime::fromTime_t(QDateTime::currentSecsSinceEpoch());
qDebug() << time2; // QDateTime(2022-02-23 09:03:41.000 HKT Qt::LocalTime)

附注

时间戳处理网站

https://tool.chinaz.com/tools/unixtime.aspx