获取本机网络信息

在pro文件中加入如下代码

QT       += network

widget.h中的代码如下

#ifndef WIDGET_H
#define WIDGET_H

#include <QWidget>
#include <QLabel>
#include <QPushButton>
#include <QLineEdit>
#include <QGridLayout>
#include <QMessageBox>
#include <QHostInfo>
#include <QNetworkInterface>

namespace Ui {
class Widget;
}

class Widget : public QWidget
{
    Q_OBJECT

public:
    explicit Widget(QWidget *parent = 0);
    ~Widget();
    void getHostInformation();
public slots:
    void slotDetail();
private:
    QLabel *hostLabel;
    QLineEdit *LineEditLocalHostName;
    QLabel *ipLabel;
    QLineEdit *LineEditAddress;
    QPushButton *detailBtn;
    QGridLayout *mainLayout;
    Ui::Widget *ui;
};

#endif // WIDGET_H

widget.cpp中的代码如下

#include "widget.h"
#include "ui_widget.h"
#include <QDebug>
#include <QNetworkAddressEntry>

Widget::Widget(QWidget *parent) :
    QWidget(parent),
    ui(new Ui::Widget)
{
    ui->setupUi(this);
    hostLabel=new QLabel(tr("主机名："));
    LineEditLocalHostName=new QLineEdit();
    ipLabel=new QLabel(tr("IP地址："));
    LineEditAddress=new QLineEdit();
    detailBtn=new QPushButton(tr("详细"));
    mainLayout=new QGridLayout(this);
    mainLayout->addWidget(hostLabel,0,0);
    mainLayout->addWidget(LineEditLocalHostName,0,1);
    mainLayout->addWidget(ipLabel,1,0);
    mainLayout->addWidget(LineEditAddress,1,1);
    mainLayout->addWidget(detailBtn,2,0,1,2);
    getHostInformation();
    connect(detailBtn,SIGNAL(clicked(bool)),
            this,SLOT(slotDetail()));
}

//获取详细信息函数
void Widget::getHostInformation()
{
    QString localHostName=QHostInfo::localHostName();  //获取本机主机名
    LineEditLocalHostName->setText(localHostName);

    //根据主机名获取相关的IP地址
    QHostInfo hostInfo=QHostInfo::fromName(localHostName);
    //获取主机的IP地址列表
    QList<QHostAddress> listAddress=hostInfo.addresses();
    if(!listAddress.isEmpty())
    {
        LineEditAddress->setText(listAddress.at(2).toString());
    }

}
//“详细”按键按下时的槽函数
void Widget::slotDetail()
{
    QString detail="";
    //QNetWorkInterface类提供了一个主机IP地址和网络接口的列表
    QList<QNetworkInterface> list=QNetworkInterface::allInterfaces();

    for(int i=0;i<list.count();i++)
    {
        QNetworkInterface interface=list.at(i);
        //获得网络接口的名称
        detail=detail+tr("设备")+interface.name()+"\n";
        //获得网络接口的硬件地址
        detail=detail+tr("硬件")+interface.hardwareAddress()+"\n";
        QList<QNetworkAddressEntry> entryList=interface.addressEntries();

        for(int j=1;j<entryList.count();j++)
        {
            QNetworkAddressEntry entry=entryList.at(j);
            detail=detail+"\t"+tr("IP地址：")+entry.ip().toString()+"\n";
            detail=detail+"\t"+tr("子网掩码：")+entry.netmask().toString()+"\n";
            detail=detail+"\t"+tr("广播地址：")+entry.broadcast().toString()+"\n";
        }

    }  //end for(int i=0;i<list.count();i++)
    QMessageBox::information(this,tr("Detail"),detail);
}
Widget::~Widget()
{
    delete ui;
}

main.cpp中的代码如下

#include "widget.h"
#include <QApplication>

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    Widget w;
    w.show();

    return a.exec();
}

运行效果如下

原文地址：https://www.cnblogs.com/Manual-Linux/p/9542582.html