如题 ， 通过QProcess获取到的局域网mac地址，使用QNetworkReply （记得要QT += network）可以获取其对应的生产产商（将mac地址传入某专门查询mac地址厂商的网站，并分析其返回值，获得结果，这个URL可以修改成别的，可以自己去调试），代码如下（从项目中摘取，放心使用）：

    //search mac with http for manufacturer; 需要联网;
    QString manufacturer = UNKOWN;
    if(mac!=UNKOWN && mac!="ipconfig -all"){
        QNetworkRequest request(QUrl("http://7n4.cn/?mac="+mac));
        request.setRawHeader("Host","7n4.cn");
        request.setRawHeader("User-Agent", "Mozilla/5.0 (X11; Linux x86_64; rv:7.0.1) Gecko/20100101 Firefox/7.0.1");
        request.setRawHeader("Accept","text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8");
        request.setRawHeader("Accept-Language", "zh-cn,zh;q=0.5");
        request.setRawHeader("Accept-Encoding", "deflate");
        request.setRawHeader("Accept-Charset", "utf-8;q=0.7,*;q=0.7");
        request.setRawHeader("Connection", "keep-alive");

        QNetworkReply* reply = m_manger->get(request);
        QEventLoop eventLoop;
        connect(reply,&QNetworkReply::finished,&eventLoop,&QEventLoop::quit);
        eventLoop.exec(QEventLoop::ExcludeUserInputEvents);

        strOut = QString::fromUtf8(reply->readAll());
        reply->close();
        reply->deleteLater();
        reply = nullptr;

        if(!strOut.isEmpty())
        {
            strList = strOut.split("<div>");
            QString key = QString::fromWCharArray(L"厂商名称: ");
            for(int i=0;i<strList.count();i++)
            {
                QString str = strList.at(i);
                int pos = str.indexOf(key);
                if(pos<0){
                    continue;
                }
                str = str.split(key).last();
                manufacturer = str.split("</div>").first();
                break;
            }
        }
    }

附： 若要了解如何获取局域网的mac地址，请参考我的csdn的另一篇博文。