QT在Linux环境下读取和设置系统时间

读取系统时间

void moreidDialog::refresh_time()  
{  
    QDateTime time;  
    txt_time->setText(time.currentDateTime().toString("yyyy") + "." + \  
                      time.currentDateTime().toString("M") + "." + \  
                      time.currentDateTime().toString("d") + "." + \  
                      time.currentDateTime().toString("h") + "." + \  
                      time.currentDateTime().toString("m"));  
}  

设置系统时间

//保存时间键  
void moreidDialog::slot_save_time_key()  
{  
    QDateTime time;  
    QString str = txt_time->text();  
    //判断格式是否正确  
    if (str.count(".") != 4)  
    {  
        txt_time->setText(tr("ge shi cuo wu"));  
        return;  
    }  
    int i = 0,j = 0;  
    i = str.indexOf(".");  
    QString year = str.mid(0,i);  
    j = str.indexOf(".",i + 1);  
    QString month = str.mid(i + 1,j - i - 1);  
    i = j;  
    j = str.indexOf(".",i + 1);  
    QString day = str.mid(i + 1,j - i - 1);  
    i = j;  
    j = str.indexOf(".",i + 1);  
    QString hour = str.mid(i + 1,j - i - 1);  
    i = j;  
    j = str.indexOf(".",i + 1);  
    QString min = str.mid(i + 1,j - i - 1);  
    bool ok = false;  
    year.toInt(&ok);  
    if (ok == false)  
    {  
        txt_time->setText(tr("ge shi cuo wu"));  
        return;  
    }  
    month.toInt(&ok);  
    if (ok == false)  
    {  
        txt_time->setText(tr("ge shi cuo wu"));  
        return;  
    }  
    day.toInt(&ok);  
    if (ok == false)  
    {  
        txt_time->setText(tr("ge shi cuo wu"));  
        return;  
    }  
    hour.toInt(&ok);  
    if (ok == false)  
    {  
        txt_time->setText(tr("ge shi cuo wu"));  
        return;  
    }  
    min.toInt(&ok);  
    if (ok == false)  
    {  
        txt_time->setText(tr("ge shi cuo wu"));  
        return;  
    }  
    str = "date -s " + month + "/" + day + "/" + year;  
    system(str.toLatin1().data());  
    str = "date -s " + hour + ":" + min + ":" + "00";  
    system(str.toLatin1().data());  
    //强制写入到CMOS  
    system("clock -w");  
}  

同步系统时钟与硬件时钟时间命令:

      硬件时钟同步到系统时钟:hwclock --hctosys

      系统时钟同步到硬件时钟:hwclock -systohc