Qt中获得IP、MAC地址、用户名、机器名

// 涉及到网络模块时记得在工程问题，加上：   QT += network

// 并且根据相应提示，添加相应的头文件：#include <QtNetwork>

// 获得ip地址
QString getIpAdress()
{
    QString localIPAddress = "";
     QList <QHostAddress>listAddress = QNetworkInterface::allAddresses();
     for(int j = 0; j < listAddress.size(); j++){
         if(!listAddress.at(j).isNull()
         && listAddress.at(j).protocol() ==  QAbstractSocket::IPv4Protocol
         && listAddress.at(j) != QHostAddress::LocalHost){
             localIPAddress = listAddress.at(j).toString();
             return localIPAddress;
         }
     }
     return localIPAddress;
}

//获得MAC地址
QStringUSBMainUI::getMACAdress()
{
  QList<QNetworkInterface> NetList;//网卡链表
  int NetCount = 0;//网卡个数
  int Neti=0;
  QNetworkInterface thisNet;//所要使用的网卡
  
  NetList = QNetworkInterface::allInterfaces();//获取所有网卡信息
  NetCount = NetList.count();//统计网卡个数
  
  for(Neti = 0; Neti < NetCount; Neti++){//遍历所有网卡
    if( NetList[Neti].isValid() ){//判断该网卡是否是合法
      thisNet = NetList[Neti];//将该网卡置为当前网卡
      break;
    }
  }
  return(thisNet.hardwareAddress());//获取该网卡的MAC
}

// 获得用户名
QString getUserName()
{
    QString userName = QDesktopServices::storageLocation(QDesktopServices::HomeLocation);
    userName = userName.section("/", -1, -1);
    return userName;
}

// 获得机器名字
QString getMachineName()
{
    QString localHostName = QHostInfo::localHostName();
    return localHostName;
}