Qt 时间戳和时间相关的转换操作

chatgpt

1.获取时间戳

#include <QDateTime>
#include <QDebug>

qint64 timestamp = QDateTime::currentDateTime().toSecsSinceEpoch();
qDebug() << "当前时间戳：" << timestamp;

qint64 timestamp = 1615558799;
QDateTime dateTime = QDateTime::fromSecsSinceEpoch(timestamp);
qDebug() << "时间戳对应的日期时间：" << dateTime.toString("yyyy-MM-dd hh:mm:ss");



QString strDateTime = "2021-03-12 23:59:59";
QDateTime dateTime = QDateTime::fromString(strDateTime, "yyyy-MM-dd hh:mm:ss");
qint64 timestamp = dateTime.toSecsSinceEpoch();
qDebug() << "日期时间对应的时间戳：" << timestamp;



QString strDateTime = "2023-03-20 12:34:56";
QDateTime dateTime = QDateTime::fromString(strDateTime, "yyyy-MM-dd hh:mm:ss");
qDebug() << "时间字符串对应的 Qt 时间对象：" << dateTime;


QDateTime dateTime = QDateTime::currentDateTime();
QString strDateTime = dateTime.toString("yyyy-MM-dd hh:mm:ss");
qDebug() << "Qt 时间对象对应的时间字符串：" << strDateTime;


计算时间戳时间差

qint64 timestamp = QDateTime::currentDateTime().toSecsSinceEpoch();
qint64 timestamp_60s_ago = timestamp - 60;
qint64 time_difference = timestamp - timestamp_60s_ago;