QT在linux環境下讀取和設置系統時間（通過system來直接調用Linux命令，注意權限問題）

QT在Linux環境下讀取和設置系統時間

 

本文博客鏈接:http://blog.csdn.NET/jdh99,作者:jdh,轉載請注明.

 

環境：

主機:Fedora12

開發軟件：QT

 

讀取系統時間

 

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"));
}

讀取到分，時間間隔用"."，最終讀取並顯示的效果：2011.12.27.9.14

 

設置系統時間

//保存時間鍵
void moreidDialog::slot_save_time_key()
{
    QDateTime time;
    QString str = txt_time->text();
    //判斷格式是否正確
    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());
    //強制寫入到CMOS
    system("clock -w");
}

 

同步系統時鍾與硬件時鍾時間命令:

硬件時鍾同步到系統時鍾:hwclock --hctosys

系統時鍾同步到硬件時鍾:hwclock -systohc

http://blog.csdn.net/jdh99/article/details/7102196