QT中时间时区处理总结

news2025/1/24 7:25:37

最近项目中要做跨国设备时间校正功能，用到了时区时间，在此做一下记录。

1.常见时区名

2.测试代码

3.运行效果

1.常见时区名

"Pacific/Midway": "中途岛 (UTC-11:00)",
"Pacific/Honolulu": "檀香山 (UTC-10:00)",
"America/Anchorage": "安克雷奇 (UTC-08:00)",
"America/Los_Angeles": "洛杉矶/美国太平洋 (UTC-07:00)",
"America/Tijuana": "提华纳/美国太平洋 (UTC-07:00)",
"America/Phoenix": "凤凰城美国山区 (UTC-07:00)",
"America/Chihuahua": "奇瓦瓦 (UTC-06:00)",
"America/Denver": "丹佛/美国山区 (UTC-06:00)",
"America/Costa_Rica": "哥斯达黎加/美国中部 (UTC-06:00)",
"America/Regina": "里贾纳/美国中部 (UTC-06:00)",
"America/Mexico_City": "墨西哥城/美国中部 (UTC-05:00)",
"America/Chicago": "芝加哥/美国中部 (UTC-05:00)",
"America/Bogota": "波哥大/哥伦比亚 (UTC-05:00)",
"America/New_York": "纽约/美国东部 (UTC-04:00)",
"America/Caracas": "加拉加斯/委内瑞拉 (UTC-04:30)",
"America/Barbados": "巴巴多斯/大西洋 (UTC-04:00)",
"America/Manaus": "马瑙斯/亚马逊 (UTC-04:00)",
"America/Santiago": "圣地亚哥 (UTC-03:00)",
"America/Sao_Paulo": "圣保罗 (UTC-03:00)",
"America/St_Johns": "圣约翰/纽芬兰 (UTC-04:00)",
"America/Montevideo": "蒙得维的亚/乌拉圭 (UTC-03:00)",
"America/Godthab": "戈特霍布 (UTC-02:00)",
"Atlantic/South_Georgia": "南乔治亚 (UTC-02:00)",
"Atlantic/Cape_Verde": "佛得角 (UTC-01:00)",
"Atlantic/Azores": "亚述尔群岛 (UTC+00:00)",
"Africa/Casablanca": "卡萨布兰卡 (UTC+00:00)",
"Europe/London": "伦敦/格林尼治 (UTC+00:00)",
"Africa/Brazzaville": "布拉扎维/西部非洲 (UTC+01:00)",
"Africa/Windhoek": "温得和克 (UTC+01:00)",
"Europe/Amsterdam": "阿姆斯特丹/中欧 (UTC+02:00)",
"Europe/Belgrade": "贝尔格莱德/中欧 (UTC+02:00)",
"Europe/Brussels": "布鲁塞尔/中欧 (UTC+02:00)",
"Europe/Sarajevo": "萨拉热窝/中欧 (UTC+02:00)",
"Africa/Harare": "哈拉雷/中部非洲 (UTC+02:00)",
"Africa/Cairo": "开罗/东欧 (UTC+02:00)",
"Asia/Beirut": "贝鲁特/东欧 (UTC+03:00)",
"Europe/Athens": "雅典/东欧 (UTC+03:00)",
"Europe/Helsinki": "赫尔辛基/东欧 (UTC+03:00)",
"Asia/Jerusalem": "耶路撒冷/以色列 (UTC+03:00)",
"Asia/Amman": "安曼/东欧 (UTC+03:00)",
"Europe/Minsk": "明斯克 (UTC+03:00)",
"Asia/Baghdad": "巴格达 (UTC+03:00)",
"Europe/Moscow": "莫斯科 (UTC+03:00)",
"Asia/Kuwait": "科威特 (UTC+03:00)",
"Africa/Nairobi": "内罗毕/东部非洲 (UTC+03:00)",
"Asia/Baku": "巴库 (UTC+05:00)",
"Asia/Tbilisi": "第比利斯 (UTC+04:00)",
"Asia/Yerevan": "埃里温 (UTC+04:00)",
"Asia/Dubai": "迪拜 (UTC+04:00)",
"Asia/Tehran": "德黑兰/伊朗 (UTC+04:30)",
"Asia/Kabul": "喀布尔/阿富汗 (UTC+04:30)",
"Asia/Karachi": "卡拉奇 (UTC+05:00)",
"Asia/Oral": "乌拉尔 (UTC+05:00)",
"Asia/Yekaterinburg": "叶卡捷林堡 (UTC+05:00)",
"Asia/Colombo": "科伦坡 (UTC+05:30)",
"Asia/Almaty": "阿拉木图 (UTC+06:00)",
"Asia/Krasnoyarsk": "克拉斯诺亚尔斯克 (UTC+07:00)",
"Asia/Bangkok": "曼谷 (UTC+07:00)",
"Asia/Shanghai": "北京/中国 (UTC+08:00)",
"Asia/Hong_Kong": "香港/中国 (UTC+08:00)",
"Asia/Irkutsk": "伊尔库茨克 (UTC+08:00)",
"Asia/Kuala_Lumpur": "吉隆坡 (UTC+08:00)",
"Australia/Perth": "佩思 (UTC+08:00)",
"Asia/Taipei": "台北时间 (UTC+08:00)",
"Asia/Seoul": "首尔 (UTC+09:00)",
"Asia/Tokyo": "东京/日本 (UTC+09:00)",
"Asia/Yakutsk": "雅库茨克 (UTC+09:00)",
"Australia/Adelaide": "阿德莱德 (UTC+09:30)",
"Australia/Darwin": "达尔文 (UTC+09:30)",
"Australia/Brisbane": "布里斯班 (UTC+10:00)",
"Australia/Hobart": "霍巴特 (UTC+10:00)",
"Australia/Sydney": "悉尼 (UTC+10:00)",
"Asia/Vladivostok": "符拉迪沃斯托克/海参崴 (UTC+10:00)",
"Pacific/Guam": "关岛 (UTC+10:00)",
"Asia/Magadan": "马加丹 (UTC+10:00)",
"Pacific/Majuro": "马朱罗 (UTC+12:00)",
"Pacific/Auckland": "奥克兰 (UTC+12:00)",
"Pacific/Fiji": "斐济 (UTC+12:00)",
"Pacific/Tongatapu": "东加塔布 (UTC+13:00)",
"America/Halifax": "哈利法克斯 (GMT-03:00)",
"Asia/Jakarta": "雅加达 (GMT+07:00)",
"America/Argentina/Buenos_Aires": "布宜诺斯艾利斯 (UTC-03:00)",
"Asia/Kolkata": "亚洲/加尔各答 (GMT+05:30)",
"Asia/Kathmandu": "加德满都 (GMT+05:45)",
"Asia/Yangon": "仰光(GMT+06:30)",
"Pacific/Noumea": "努美亚 (GMT+11:00)",
"Etc/UTC": "Etc/UTC (GMT+00:00)",
"America/Recife": "累西腓 (GMT-03:00)",
"Europe/Madrid": "马德里 (GMT+01:00)",
"Europe/Istanbul": "伊斯坦布尔 (GMT+03:00)"

2.测试代码

#include <QCoreApplication>
#include <QDateTime>
#include <QTimezone>


int main(int argc, char *argv[])
{
    QCoreApplication a(argc, argv);

    // 获取当前时间
    QDateTime curDateTime = QDateTime :: currentDateTime();
    qDebug() << curDateTime.toString("yyyy-MM-dd")
             << curDateTime.toString("yyyy-MM-dd hh:mm:ss")
             << curDateTime.toString("hh:mm:ss");

    // 使用指定日期和时间创建
    QDateTime customDateTime(QDate(2023, 12, 8), QTime(22, 56, 0));
     qDebug() << customDateTime.toString("yyyy-MM-dd hh:mm:ss");

     // 从QDateTime中分别得到QDate和QTime
     QDate date = curDateTime.date();
     QTime ctime = curDateTime.time();

     curDateTime.setDate(QDate(2023, 12, 9));
     curDateTime.setTime(QTime(23, 30, 0));
    qDebug() << curDateTime.toString("yyyy-MM-dd hh:mm:ss");
    qDebug() << curDateTime.toString(Qt::ISODate);

    // 根据当前日期时间获取特定时区的当前日期时间
    QDateTime tokyoDateTime = QDateTime::currentDateTime().toTimeZone(QTimeZone("Asia/Tokyo"));
    qDebug() << tokyoDateTime.toString("yyyy-MM-dd hh:mm:ss");

    // 字符串日期到时间
    QString strDateTime = "2013-12-08 23:17:50";
    qDebug() << "str datetime to datetime "
             << QDateTime::fromString(strDateTime, "yyyy-MM-dd hh:mm:ss").toString("yyyy-MM-dd hh:mm:ss");

    // 枚举时区
    /*
    int size = QTimeZone::availableTimeZoneIds().size();
    for (int i = 0; i < size; i++) {
        qDebug() << QTimeZone::availableTimeZoneIds().at(i);
    }
    */

    // 当前时间转UTC时间戳，秒，毫秒
    quint64 msecons = QDateTime::currentDateTime().toMSecsSinceEpoch();
    qDebug() << msecons;
    qDebug() << QDateTime::currentDateTime().toUTC().toMSecsSinceEpoch();
    qDebug() << QDateTime::currentDateTimeUtc().toMSecsSinceEpoch();

    qDebug() << QDateTime::currentDateTime().toSecsSinceEpoch()
             << QDateTime::currentDateTime().toUTC().toSecsSinceEpoch();
    // 根据毫秒时间戳恢复到当前时时间
    qDebug() << QDateTime::fromMSecsSinceEpoch(msecons, Qt::LocalTime).toString("yyyy-MM-dd hh:mm:ss");

    // 不管那个时区，UTC时间戳都是一样的
    qDebug() << QDateTime::currentDateTime().toTimeZone(QTimeZone("Asia/Tokyo")).toMSecsSinceEpoch()
             <<  QDateTime::currentDateTime().toMSecsSinceEpoch();

    // 指定时区得到时间
    qDebug() << QDateTime::fromMSecsSinceEpoch(QDateTime::currentDateTime().toTimeZone(QTimeZone("Asia/Tokyo")).toMSecsSinceEpoch(),
                                               QTimeZone("Asia/Tokyo")).toString("yyyy-MM-dd hh:mm:ss");


    return a.exec();
}