QProcess p(NULL);
p.setWorkingDirectory(szAppPath+"/database"); //指定工作路径,这个地方一定要设置;
p.start(szCmd); //开进程执行命令;
while(p.state() != QProcess::NotRunning) //延时;
{
QTime delayTime = QTime::currentTime().addMSecs(100);
while( QTime::currentTime() < delayTime)
QCoreApplication::processEvents(QEventLoop::AllEvents, 100);
}