Qt封装ping命令并将ping结果显示到界面

实现界面及在Windows 10下的运行结果如下：

代码如下：

pingNetWork.h

// 检测网络是否ping通的工具

#ifndef PINGNETWORK_H
#define PINGNETWORK_H

#include <QWidget>
#include"control_global.h"
namespace Ui {
class CPingNetWork;
}

class CONTROL_EXPORT CPingNetWork : public QWidget
{
    Q_OBJECT

public:
    explicit CPingNetWork(QWidget *parent = nullptr);
    ~CPingNetWork();

signals:

    void pingResultSignal(const QString&qsPingRst);

private:

    void initUI();

    void pingSlot();

    void clearResultSlot();

    void pingThreadFun(const QString&destIp);

    void pingResult(const QString& qsPingRst);

private:
    Ui::CPingNetWork *ui;
    bool m_bPing{true};
};

#endif // PINGNETWORK_H

pingNetWork.cpp

#include "pingNetWork.h"
#include "ui_pingNetWork.h"
#include<QRegExp>
#include<QRegExpValidator>
#include<thread>
#include<QProcess>
using namespace std::literals;

CPingNetWork::CPingNetWork(QWidget *parent) :
    QWidget(parent),
    ui(new Ui::CPingNetWork)
{
    ui->setupUi(this);

    initUI();

    connect(ui->startPingBtn, &QAbstractButton::clicked, this, &CPingNetWork::pingSlot);
    connect(this, &CPingNetWork::pingResultSignal, this, &CPingNetWork::pingResult);
    connect(ui->clearResultBtn, &QAbstractButton::clicked, this, &CPingNetWork::clearResultSlot);
}

CPingNetWork::~CPingNetWork()
{
    m_bPing = false;
    delete ui;
}

void CPingNetWork::initUI()
{
    ui->startPingBtn->setFixedSize(120, 60);
    ui->IPLineEdit->setFixedWidth(220);

    ui->clearResultBtn->setFixedSize(120, 60);
    ui->clearResultBtn->setFixedWidth(220);

    QRegExp rx("((2[0-4]\\d|25[0-5]|[01]?\\d\\d?)\\.){3}(2[0-4]\\d|25[0-5]|[01]?\\d\\d?)");
    auto pExpValidator = new QRegExpValidator(rx, this);
    ui->IPLineEdit->setValidator(pExpValidator);
    ui->IPLineEdit->setText(QLatin1String("127.0.0.1"));
}

void CPingNetWork::clearResultSlot()
{
    ui->networkTestRst->clear();
}

void CPingNetWork::pingSlot()
{
    if(!ui->startPingBtn->text().compare(QStringLiteral("开始Ping(&P)")))
    {
        m_bPing = true;
        ui->startPingBtn->setText(QStringLiteral("停止Ping(&W)"));
        auto destIp = ui->IPLineEdit->text();

        // 开启一个线程，用来一直ping
        std::thread pingThread(&CPingNetWork::pingThreadFun, this, destIp);
        pingThread.detach();
    }
    else
    {
        m_bPing = false;
        ui->startPingBtn->setText(QStringLiteral("开始Ping(&P)"));
    }
}

void CPingNetWork::pingResult(const QString& qsPingRst)
{
    ui->networkTestRst->append(qsPingRst);
}

void CPingNetWork::pingThreadFun(const QString&destIp)
{
    QProcess pingProcess;
    QString strArg, qsStdout;

#ifdef Q_OS_WIN  // "ping IP  -n 1 -i 2 "只Windows支持，linux不支持
    strArg = QLatin1String("ping ") + destIp + QLatin1String(" -n 1 -i 2");
    pingProcess.start(strArg, QIODevice::ReadOnly);
    pingProcess.waitForFinished(-1);
    qsStdout = QString::fromLocal8Bit(pingProcess.readAllStandardOutput());
    emit pingResultSignal(qsStdout);
#endif

// windows、Linux连续ping命令格式不同，需要区分
#ifdef Q_OS_WIN
    strArg = QLatin1String("ping ") + destIp + QLatin1String(" -t");
#elif Q_OS_UNIX
    strArg = QLatin1String("ping ") + destIp;
#endif

    while (m_bPing)
    {
        pingProcess.start(strArg, QIODevice::ReadOnly);
        pingProcess.waitForFinished(300);
        qsStdout = QString::fromLocal8Bit(pingProcess.readAllStandardOutput());
#ifdef Q_OS_WIN // windows两次ping返回的报文之间有时会插入空行，过滤掉
        auto index = qsStdout.indexOf("\r\n");
        if(-1 == index)
        {
            continue;
        }
#endif
        emit pingResultSignal(qsStdout);
        std::this_thread::sleep_for(800ms);
    }

}

说明：

• ui->IPLineEdit用来输入ping的目的机器的IP地址。其通过36行的正则表达式限定只能输入IP地址格式的数字，该正则表达式的具体含义，参见：利用QLineEdit的正则表达式校验器显示IP地址 博文。
• ui->startPingBtn、ui->clearResultBtn分别是上述界面的“开始ping”、“清除结果”按钮。
• 程序难懂的部分作了注释，程序很容易看懂，不再具体描述。