Qt文件学习：Qt读取本地txt文件

//mainwindow.h
#include <QMainWindow>
#include <QObject>

namespace Ui {
class MainWindow;
}

class MainWindow : public QMainWindow
{
    Q_OBJECT

public:
    explicit MainWindow(QWidget *parent = 0);
    ~MainWindow();
    void getmsg();

private:
    Ui::MainWindow *ui;
};

#endif // MAINWINDOW_H

//main.cpp
#include "mainwindow.h"
#include <QApplication>

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

    w.show();

    return a.exec();
}

#include "mainwindow.h"
#include "ui_mainwindow.h"
#include <QTextCodec>
#include <QTextStream>
#include <QFile>
//#include <QDebug>

MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MainWindow)
{
    ui->setupUi(this);
    getmsg();
}

MainWindow::~MainWindow()
{
    delete ui;
}

void MainWindow::getmsg()
{
    QString dataFromFile;

    QTextCodec * code = QTextCodec::codecForName("utf8");
    QFile file("D:\\text.txt");

// qDebug() << "text";
    if ( !file.open(QIODevice::ReadOnly | QIODevice::Text) )
        return ;

    QTextStream stream(&file);
    stream.setCodec(code);//对输出流的设置
    while (stream.atEnd() == 0) {
        ui->textBrowser->setText(stream.readAll());
    }
}

参考：http://blog.csdn.net/xingfeng2010/article/details/7290802