QJson生成文件和解析文件

    QVariantHash data;
    QVariantHash patientData;
    patientData.insert("patient ID","22334");
    patientData.insert("Name","ZYL_YY");
    patientData.insert("age","26");
    patientData.insert("clinicalData","wwwww");
    patientData.insert("Selected site","lever");
    patientData.insert("Selected mode","pulse mode");
    data.insert("patientInformation",patientData);
     QJsonObject rootobj = QJsonObject::fromVariantHash(data);
    QJsonDocument document;
    document.setObject(rootobj);
    QByteArray byte_array = document.toJson();
    QString json_str = (byte_array);
    QFile file("/home/wxh1/1.json");
    if(!file.open(QIODevice::ReadWrite | QIODevice::Text | QIODevice::Truncate))
    {
        qDebug()<<"file error";
    }
    QTextStream in(&file);
    in<<json_str;
    file.close();
  
    QVariant