QFile和QFileInfo

#include <QApplication>
#include <QFileInfo>
#include <QStringList>
#include <QDateTime>
#include <QDebug>

int main(int argc, char *argv[])
{
    
    
    QApplication a(argc, argv);
    QFile file("myflie.txt");
    if(!file.open(QIODevice::WriteOnly | QIODevice::Text))
    {
    
    
        qDebug()<<file.errorString();
    }
    file.write("hello\nworld!");
    file.close();
    QFileInfo info(file);
    qDebug()<<"绝对路径:"<<info.absoluteFilePath()<<endl
           <<"文件名:"<<info.fileName()<<endl
          <<"基本名称:"<<info.baseName()<<endl
         <<"后缀:"<<info.suffix()<<endl
        //<<"创建时间:"<<info.created()<<endl
        <<"创建时间:"<<info.birthTime()<<endl
       <<"大小:"<<info.size();
    if(!file.open(QIODevice::ReadOnly | QIODevice::Text))
    {
    
    
        qDebug()<<file.errorString();
    }
    QString str = file.readAll();
    qDebug()<<str<<
              file.pos();
    file.seek(0);
    QByteArray array;
    array = file.read(5);
    qDebug()<<array<<endl
           <<file.pos();
    file.close();
    return a.exec();
}