Qt：获取文件信息类-QFileInfo

一般用法：

QFileInfo fileInfo(path);

//or

QFileInfo fileInfo;

fileInfo.setFile(path);

void Dialog::slotFile()
{
    QString fileName = QFileDialog::getOpenFileName(this,"打开","/","files (*)");
    ui->fileNameLineEdit->setText(fileName);
}
 
void Dialog::slotGet()
{
    QString file = ui->fileNameLineEdit->text();
    QFileInfo info(file);
 
    qint size = info.size();         //获取大小
    QDateTime created = info.created();//创建时间
    QDateTime lastModified = info.lastModified();//最后修改时间
    QDateTime lastRead = info.lastRead();//最后访问时间
 
    bool isDir = info.isDir();   //是否是目录
    bool isFile = info.isFile();  //是否是文件
    bool isSymLink = info.isSymLink(); //符合链接
    bool isHidden = info.isHidden();  //隐藏属性
    bool isReadable = info.isReadable(); //读属性
    bool isWritable = info.isWritable();  //写属性
    bool isExecutable = info.isExecutable(); //可执行属性
 
    ui->sizeLineEdit->setText(QString::number(size));
    ui->createTimeLineEdit->setText(created.toString());
    ui->lastModifiedLineEdit->setText(lastModified.toString());
    ui->lastReadLineEdit->setText(lastRead.toString());
 
    ui->isDirCheckBox->setCheckState(isDir?Qt::Checked:Qt::Unchecked);
    ui->isFileCheckBox->setCheckState(isFile?Qt::Checked:Qt::Unchecked);
    ui->isSymLinkCheckBox->setCheckState(isSymLink?Qt::Checked:Qt::Unchecked);
    ui->isHiddenCheckBox->setCheckState(isHidden?Qt::Checked:Qt::Unchecked);
    ui->isReadableCheckBox->setCheckState(isReadable?Qt::Checked:Qt::Unchecked);
    ui->isWritableCheckBox->setCheckState(isWritable?Qt::Checked:Qt::Unchecked);
    ui->isExecutableCheckBox->setCheckState(isExecutable?Qt::Checked:Qt:: Unchecked);
}

参考：