QString tempData=ui->txtDataHex->toPlainText();
if (tempData==""){return;}//如果没有内容则不保存
QDateTime now=QDateTime::currentDateTime();
QString name=now.toString("yyyyMMddHHmmss");
QString fileName=name+".txt";
QFile file(fileName);
file.open(QFile::WriteOnly | QIODevice::Text | QIODevice::Append);
QTextStream out(&file);