QFile读文件

#include <QCoreApplication>
#include <QFileInfo>
#include <QDebug>
#include <QFile>
#include <QIODevice>

int main(int argc, char *argv[])
{
    QCoreApplication a(argc, argv);

    QFile file("D:/qt/myqfileinfo/in.txt");
    qDebug()<<file.exists();
    if (!file.open(QIODevice::ReadOnly | QIODevice::Text))
        qDebug()<<"open failed";

    else{
        while (!file.atEnd()) {
            QByteArray line = file.readLine();
            qDebug()<<line;
        }
    }
    file.close(); //关闭文件


    return a.exec();
}