QString runpath = QCoreApplication::applicationDirPath();
    QString file_path = runpath+"/file/dataset.h5";
    std::string str = file_path.toStdString();/** 必须要有，否则乱码  */
    const char * ch= str.c_str();

    QString str_1 = QString(ch);
    cout<<ch;
    qDebug()<<str_1;