QZip или использование zip в Qt. QZipWritter And QZipReader.

https://blog.actorsfit.com/a?ID=01700-bda59bbc-150e-4f45-8d17-59adb0c82992

 Use the Qt library to compress and decompress.

Modify the pro file

QT       += gui-private

Import header file

#include <private/qzipwriter_p.h>
#include <private/qzipreader_p.h>

compression

void zipWriter(QString path)
{
    QZipWriter *writer = new QZipWriter(path + "/test.zip");
   //Add folder
//writer->addDirectory(path + "/ss");
   //add files
    QFile file(path + "/test.txt");
    if (!file.exists())
    {
        return;
    }
    file.open(QIODevice::ReadOnly);
    writer->addFile("test.txt", file.readAll());
    file.close();
    writer->close();
}

Unzip

void zipReader(QString path)
{
    QZipReader reader(path + "/test.zip");
    reader.extractAll(path);

    QFile file(path);
    file.open(QIODevice::WriteOnly);
    file.write(reader.fileData(QString::fromLocal8Bit("%1").arg(path + "/Desktop")));
    file.close();
    reader.close();
}