QT File Class

 The class of File operation:
      QFile 
      QString   QStringList
      QFileInfo    etc..

QString strFilePath = dir.absoluteFilePath(files[i]);
        QFile file(strFilePath);
        QFileInfo fileInfo(file);
        qint64  size = fileInfo.size();
        QDateTime   dateTime = fileInfo.created();
        QString strDateTime = dateTime.toString(tr("yyyy MM 月dd日 hh:mm"));
        QString strPermission;

        if (fileInfo.isWritable())
            strPermission = ("W");
        if (fileInfo.isReadable())
            strPermission.append("R");
        if (fileInfo.i***ecutable())
            strPermission.append("X");