QT reads all files under the path or files of the specified type (including recursion, judging whether it is empty and creating the path)

// Traverse to get all files under the folder

void Dialog::GetAllFiles(const QString path, QFileInfoList &fileInfoList)
{
    
    QDir dir(path);
    foreach(QFileInfo info,dir.entryInfoList(QDir::NoDotAndDotDot | QDir::Dirs))
    {
    
        //qDebug()<<"dir:" << info.filePath();
        GetAllFiles(info.filePath(),fileInfoList);
    }

    foreach(QFileInfo info,dir.entryInfoList(QDir::Files))
    {
    
        fileInfoList.append(info);
        qDebug()<< " file ：" << info.filePath();
    }
}

// Get the file of the specified type under the current folder ( Non recursive )

void Dialog::GetDirFiles(const QString dirPath)
{
    
    QDir *dir = new QDir(dirPath);

    //  Determine if the path exists , Create if it does not exist 
    if(!dir->exists(dirPath))
    {
    
        //  Create path file , It can be multi-level 
        dir->mkpath(dirPath);
    }

    //  Determine whether the folder content is empty 
    QFileInfoList fileInfoList;
    GetAllFiles(dirPath, fileInfoList);
    if(fileInfoList.size() == 0)
    {
    
        QMessageBox::information(this," Tips "," There are no files in the file path ！");
        return;
    }

//  Judge whether the file exists 
// QFile fileName(filePath);
// if(!fileName.exists())
// {
    
// return true;
// }

    QStringList filter;
    QList<QFileInfo> *fileInfo = new QList<QFileInfo>(dir->entryInfoList(filter));

    for(int i = 0; i < fileInfo->count(); i++)
    {
    
        if(fileInfo->at(i).fileName().split(".").back() != "cpp")
        {
    
            continue;
        }

        qDebug()<< fileInfo->at(i).filePath();
        qDebug()<< fileInfo->at(i).fileName();
    }
}

// Get all folders under the current folder ( Non recursive )

void Dialog::GetAllDirs(const QString path)
{
    
    QDir dir(path);
    foreach(QFileInfo info,dir.entryInfoList(QDir::NoDotAndDotDot | QDir::Dirs))
    {
    
        qDebug()<<"path:" << info.filePath();
        qDebug()<<"name:" << info.fileName();
    }
}