feat: 使用QHostInfo来获取域名的服务器IP

QtQHostInfoEx/ExQHostInfo.cpp

@@ -0,0 +1,89 @@
+#include "ExQHostInfo.h"
+#include "ui_ExQHostInfo.h"
+
+#include <QHostInfo>
+#include <QNetworkInterface>
+
+ExQHostInfo::ExQHostInfo(QWidget *parent) :
+    QWidget(parent),
+    ui(new Ui::ExQHostInfo)
+{
+    ui->setupUi(this);
+
+    setWindowTitle("QHostInfo/QNetworkInterface查询主机网络状态：");
+}
+
+ExQHostInfo::~ExQHostInfo()
+{
+    delete ui;
+}
+
+//通过协议类型返回协议名称
+QString ExQHostInfo::protocolName(QAbstractSocket::NetworkLayerProtocol protocol)
+{
+    switch (protocol) {
+    case QAbstractSocket::IPv4Protocol:
+        return "IPv4 Protocol";
+    case QAbstractSocket::IPv6Protocol:
+        return "IPv6 Protocol";
+    case QAbstractSocket::AnyIPProtocol:
+        return "Any IP Protocol";
+    default:
+        return "Unknow Network Layer Protocol";
+    }
+}
+
+
+void ExQHostInfo::on_btnGetHostInfo_clicked()
+{
+
+}
+
+void ExQHostInfo::on_btnAllAddresses_clicked()
+{
+
+}
+
+void ExQHostInfo::on_btnAllInterfaces_clicked()
+{
+
+}
+
+void ExQHostInfo::on_btnFindIP_clicked()
+{
+    QString hostName = ui->lineEdit->text();  //域名
+    ui->plainTextEdit->appendPlainText("正在查找域名的服务器的主机信息：" + hostName);
+    QHostInfo::lookupHost(hostName, this, SLOT(onLookedUpHostInfo(QHostInfo)));
+}
+
+void ExQHostInfo::on_btnClean_clicked()
+{
+    ui->plainTextEdit->clear();
+}
+
+//查询主机信息的槽函数
+void ExQHostInfo::onLookedUpHostInfo(const QHostInfo &host)
+{
+    QList<QHostAddress> list = host.addresses();
+
+    if (list.isEmpty())
+        return;
+
+    for (int i = 0; i < list.count(); i++) {
+        QHostAddress host = list.at(i);
+        bool bIpv4 = ui->checkBox->isChecked();  //只显示IPv4
+
+        if (bIpv4) {
+            bIpv4 = QAbstractSocket::IPv4Protocol == host.protocol();
+        } else {
+            bIpv4 = false;
+        }
+
+        if (bIpv4) {
+            ui->plainTextEdit->appendPlainText("协议：" + protocolName(host.protocol()));
+            ui->plainTextEdit->appendPlainText(host.toString());
+        }
+
+    }
+}
+

QtQHostInfoEx/ExQHostInfo.h

@@ -0,0 +1,41 @@
+#ifndef EXQHOSTINFO_H
+#define EXQHOSTINFO_H
+
+#include <QWidget>
+#include <QAbstractSocket>
+class QHostInfo;
+
+
+namespace Ui {
+class ExQHostInfo;
+}
+
+class ExQHostInfo : public QWidget
+{
+    Q_OBJECT
+
+public:
+    explicit ExQHostInfo(QWidget *parent = nullptr);
+    ~ExQHostInfo();
+
+private:
+    QString protocolName(QAbstractSocket::NetworkLayerProtocol protocol);  //通过协议类型返回协议名称
+
+private slots:
+    void on_btnGetHostInfo_clicked();
+    void on_btnAllAddresses_clicked();
+    void on_btnAllInterfaces_clicked();
+    void on_btnFindIP_clicked();
+    void on_btnClean_clicked();
+
+    void onLookedUpHostInfo(const QHostInfo& host);
+
+
+
+
+private:
+    Ui::ExQHostInfo *ui;
+
+};
+
+#endif // EXQHOSTINFO_H

QtQHostInfoEx/ExQHostInfo.ui

@@ -0,0 +1,87 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ui version="4.0">
+ <class>ExQHostInfo</class>
+ <widget class="QWidget" name="ExQHostInfo">
+  <property name="geometry">
+   <rect>
+    <x>0</x>
+    <y>0</y>
+    <width>635</width>
+    <height>320</height>
+   </rect>
+  </property>
+  <property name="windowTitle">
+   <string>ExQHostInfo</string>
+  </property>
+  <layout class="QVBoxLayout" name="verticalLayout">
+   <item>
+    <layout class="QGridLayout" name="gridLayout">
+     <item row="2" column="0" colspan="2">
+      <layout class="QHBoxLayout" name="horizontalLayout"/>
+     </item>
+     <item row="4" column="0" colspan="2">
+      <widget class="QLineEdit" name="lineEdit">
+       <property name="text">
+        <string>www.baidu.com</string>
+       </property>
+      </widget>
+     </item>
+     <item row="4" column="2">
+      <widget class="QPushButton" name="btnFindIP">
+       <property name="text">
+        <string>QHostInfo查询左侧域名IP地址</string>
+       </property>
+      </widget>
+     </item>
+     <item row="6" column="0" colspan="3">
+      <layout class="QHBoxLayout" name="horizontalLayout_2"/>
+     </item>
+     <item row="0" column="2">
+      <widget class="QPushButton" name="btnAllInterfaces">
+       <property name="text">
+        <string>QNetworkInterface::allInterfaces()</string>
+       </property>
+      </widget>
+     </item>
+     <item row="0" column="0">
+      <widget class="QPushButton" name="btnGetHostInfo">
+       <property name="text">
+        <string>QHostInfo查询主机名和IP</string>
+       </property>
+      </widget>
+     </item>
+     <item row="0" column="1">
+      <widget class="QPushButton" name="btnAllAddresses">
+       <property name="text">
+        <string>QNetworkInterface::allAddresses()</string>
+       </property>
+      </widget>
+     </item>
+     <item row="5" column="0">
+      <widget class="QCheckBox" name="checkBox">
+       <property name="text">
+        <string>只显示IPv4协议的网络信息</string>
+       </property>
+       <property name="checked">
+        <bool>true</bool>
+       </property>
+      </widget>
+     </item>
+     <item row="5" column="2">
+      <widget class="QPushButton" name="btnClean">
+       <property name="text">
+        <string>清空</string>
+       </property>
+      </widget>
+     </item>
+    </layout>
+   </item>
+   <item>
+    <widget class="QPlainTextEdit" name="plainTextEdit"/>
+   </item>
+  </layout>
+ </widget>
+ <layoutdefault spacing="6" margin="11"/>
+ <resources/>
+ <connections/>
+</ui>

QtQHostInfoEx/QtQHostInfoEx.pro

@@ -0,0 +1,51 @@
+#-------------------------------------------------
+#
+# Project created by QtCreator 2019-11-18T19:47:03
+#
+#-------------------------------------------------
+
+QT       += core gui network
+
+greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
+
+TARGET = QtQHostInfoEx
+TEMPLATE = app
+
+# The following define makes your compiler emit warnings if you use
+# any feature of Qt which has been marked as deprecated (the exact warnings
+# depend on your compiler). Please consult the documentation of the
+# deprecated API in order to know how to port your code away from it.
+DEFINES += QT_DEPRECATED_WARNINGS
+
+# You can also make your code fail to compile if you use deprecated APIs.
+# In order to do so, uncomment the following line.
+# You can also select to disable deprecated APIs only up to a certain version of Qt.
+#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.0
+
+CONFIG += c++11
+
+SOURCES += \
+        main.cpp \
+        ExQHostInfo.cpp
+
+HEADERS += \
+        ExQHostInfo.h
+
+FORMS += \
+        ExQHostInfo.ui
+
+
+macx {
+ICON = Icon.icns
+}
+unix:!macx{
+# linux only
+}
+win32 {
+RC_ICONS = icon.ico
+}
+
+# Default rules for deployment.
+qnx: target.path = /tmp/$${TARGET}/bin
+else: unix:!android: target.path = /opt/$${TARGET}/bin
+!isEmpty(target.path): INSTALLS += target

QtQHostInfoEx/main.cpp

@@ -0,0 +1,11 @@
+#include "ExQHostInfo.h"
+#include <QApplication>
+
+int main(int argc, char *argv[])
+{
+    QApplication a(argc, argv);
+    ExQHostInfo w;
+    w.show();
+
+    return a.exec();
+}