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说明：此示例包含了基本的常使用的系统操作
效果如下:
mainwindos.cpp
#pragma execution_character_set("utf-8") #include "mainwindow.h" #include <QDesktopWidget> #include <QApplication> #include <QHostInfo> #include <QNetworkInterface> #include <QListView> #include <QStringListModel> #include <QProcess> MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent) { QDesktopWidget *desktopWidget = QApplication::desktop(); //1.1 获取屏幕分辨率 QRect screenRect = desktopWidget->screenGeometry(); int sWidth = screenRect.width();//屏幕宽度 int sHeight = screenRect.height(); QLabel *m_label00 = new QLabel("屏幕分辨率："); QString ip = (QString::number(sWidth,10)+"X"+QString::number(sHeight,10)); QLabel *m_label01 = new QLabel(ip); //1.2 获取计算机名称 QString localHostName = QHostInfo::localHostName(); QLabel *m_label10 = new QLabel("本机名："); QLabel *m_label11 = new QLabel(localHostName); //1.3 获取计算机IP QLabel *m_label20 = new QLabel("IP："); QLabel *m_label21 = new QLabel(); QHostInfo hostInfo = QHostInfo::fromName(localHostName); QList<QHostAddress> listAddress = hostInfo.addresses();// 创建一个 QList,类型 QHostAddress if(!listAddress.isEmpty()) { m_label21->setText(listAddress.first().toString()); } //1.5 默认取应用程序根目录 QString strdirpath; strdirpath = qApp->applicationDirPath();// QLabel *m_label40 = new QLabel("applicationDirPath:"); QLabel *m_label41 = new QLabel(strdirpath); //1.6 默认取应用程序可执行文件名称 QString strapplicationFilePath; strapplicationFilePath = qApp->applicationFilePath(); QLabel *m_label50 = new QLabel("applicationFilePath:"); QLabel *m_label51 = new QLabel(strapplicationFilePath); //1.7 获取系统环境变量 //标题 QLabel *m_label30 = new QLabel("获取 Path 环境变量:"); QListView *listView = new QListView();//实例 QListView listView->setGeometry(QRect(10,10,380,280));//QListView 位置 QStringList strList = QProcess::systemEnvironment();//实例 QStringList 接收 path 系统变量 QStringListModel *model = new QStringListModel(strList);//装载数据模型 listView->setModel(model);//绑定数据 //1.8执行系统命令 //实例命令输入对话框 comm = new QLineEdit(); comm->setText("ipconfig"); comm->setGeometry(QRect(20,20,260,25)); //实例执行按钮 btClick = new QPushButton(this); btClick->setText("执行"); btClick->setGeometry(QRect(290,20,80,25)); connect(btClick,SIGNAL(clicked()),this,SLOT(clickExecution())); //实例输出对话框 outEdit = new QPlainTextEdit(this); outEdit->setGeometry(QRect(20,60,350,200)); //实例 QProcess process = new QProcess; connect(process, SIGNAL(readyRead()), this, SLOT(readOutput())); //dos 命令查阅 label = new QLabel(this); label->setGeometry(QRect(30,265,200,25)); label->setText(tr("<a href=\"http://www.baidu.com/s?wd=dos 命令大全\">命令 DOS查阅</a>")); //开启超链接 label->setOpenExternalLinks(true); QFrameshow1 = new QFrame(); QFrameshow1->setFrameStyle(QFrame::Panel|QFrame::Sunken);//设置框架样式 QGridLayout *childlayout1 = new QGridLayout(); childlayout1->addWidget(m_label00,0,0,1,1); childlayout1->addWidget(m_label01,0,1,1,2); childlayout1->addWidget(m_label10,1,0); childlayout1->addWidget(m_label11,1,1); childlayout1->addWidget(m_label20,2,0); childlayout1->addWidget(m_label21,2,1); childlayout1->addWidget(m_label40,3,0); childlayout1->addWidget(m_label41,3,1); childlayout1->addWidget(m_label50,4,0); childlayout1->addWidget(m_label51,4,1); QVBoxLayout *childlayout2 = new QVBoxLayout; childlayout2->addWidget(m_label30); childlayout2->addWidget(listView); QGridLayout *childlayout3 = new QGridLayout(); childlayout3->addWidget(comm); childlayout3->addWidget(btClick); childlayout3->addWidget(outEdit); //childlayout3->addWidget(process); childlayout3->addWidget(label); QVBoxLayout *mainlayout = new QVBoxLayout(QFrameshow1); mainlayout->addLayout(childlayout1); mainlayout->addLayout(childlayout2); mainlayout->addLayout(childlayout3); //显示布局控件 QWidget *m_widget = new QWidget(); m_widget->setLayout(mainlayout); this->setCentralWidget(m_widget); } MainWindow::~MainWindow() { } //执行 DOS 命令 void MainWindow::clickExecution() { //定义变量接收 dos 命令 QString info = comm->text(); //执行命令 process->start(info); //绑定反馈值 outEdit->setPlainText(output); } //QProcess 事件 void MainWindow::readOutput() { //接收反馈信息 output +=process->readAll(); //将返回值绑定控件 outEdit->setPlainText(output); } mainwindow.h
#ifndef MAINWINDOW_H #define MAINWINDOW_H #include <QMainWindow> #include <QFrame> #include <QLabel> #include <QWidget> #include <QGridLayout> #include <QHBoxLayout> #include <QLineEdit> #include <QPushButton> #include <QPlainTextEdit> #include <QProcess> #include <QLabel> class MainWindow : public QMainWindow { Q_OBJECT public: MainWindow(QWidget *parent = 0); ~MainWindow(); QFrame *QFrameshow1; private: QLineEdit *comm; //dos 命令输入框 QPlainTextEdit *outEdit; //命令执行反馈框 QPushButton *btClick; //执行按钮 QProcess *process; //QProcess QString output; //接收反馈信息 QLabel *label; private slots: void clickExecution(); //点击按钮事件 void readOutput(); //QProcess 事件 }; #endif // MAINWINDOW_H 