1)设置名称过滤器
QDir * dir = new QDir(路径);
QStringList filter;
Filter << QStringLiteral(“筛选的文件条件,如.xls...”);
dir->setNameFilters(filter);
2)获取指定条件的条目
QList<QFileInfo> *fileInfo = new QList<QFileInfo>(dir->entryInfoList(filter));
for(size_t i = 0;i < fileInfo->length();i++){
QString path = fileInfo.at(i).filePath();//得到指定文件路径}
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