Qt调用外部程序QProcess通信

#include "mainwindow.h"

#include "ui_mainwindow.h"

#include <QTextCodec>

#include <QCloseEvent>

MainWindow::MainWindow(QWidget *parent) :

QMainWindow(parent),

ui(new Ui::MainWindow)

{

ui->setupUi(this);

//Qt对中文支持

QTextCodec *codec = QTextCodec::codecForName("GB2312");

QTextCodec::setCodecForLocale(codec);

process = new QProcess(this);

connect(process, SIGNAL(readyReadStandardOutput()), this, SLOT(start_read_output()));

connect(process, SIGNAL(readyReadStandardError()), this, SLOT(start_read_err_output()));

connect(process, SIGNAL(finished(int,QProcess::ExitStatus)), this, SLOT(finish_process(int, QProcess::ExitStatus)));

}

MainWindow::~MainWindow()

{

delete ui;

}

void MainWindow::on_pushButton_clicked(){

QString exe;

//exe = "test.bat";//要启动的程序

exe = "test.bat";

QStringList args;

//args<<"ping"<<"www.baidu.com";//要传递的参数

args<<"";

process->start(exe,args);

if (false == process->waitForStarted()){

ui->textBrowser->append("Process call failed!");

}else{

ui->textBrowser->append("Process call successed!");

}

}

void MainWindow::finish_process(int exitCode, QProcess::ExitStatus exitStatus){

if (exitStatus == QProcess::NormalExit){

ui->textBrowser->append("process exit normal");

}

else{

ui->textBrowser->append("process exit crash");

}

ui->textBrowser->append("process finised");

}

void MainWindow::start_read_output(){

QByteArray ba = process->readAllStandardOutput();

ui->textBrowser->append(QString::fromLocal8Bit(ba));

}

void MainWindow::start_read_err_output(){

QByteArray ba = process->readAllStandardError();

ui->textBrowser->append(QString::fromLocal8Bit(ba));

}

void MainWindow::closeEvent(QCloseEvent *event){

process->kill();

if(!process->waitForFinished(100))

return;

event->accept();

}

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mainwindow.h文件：
-----------------------------

#ifndef MAINWINDOW_H

#define MAINWINDOW_H

#include <QMainWindow>

#include <QProcess>

namespace Ui {

class MainWindow;

}

class MainWindow : public QMainWindow

{

Q_OBJECT

public:

explicit MainWindow(QWidget *parent = 0);

~MainWindow();

QProcess* process;

protected:

void closeEvent(QCloseEvent *);

private slots:

void on_pushButton_clicked();

void start_read_output();

void start_read_err_output();

void finish_process(int exitCode, QProcess::ExitStatus exitStatus);

private:

Ui::MainWindow *ui;

};

#endif // MAINWINDOW_H

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测试方法：
在Qt的Ui中放置一个textBrowse和pushButton，并且在程序目录中创建一个test.bat文件，文件内容为：ping www.baidu.com

输出结果：