获取就可以，是不是文件夹你可以自己判断
看manual
QStringList QDir::entryList ( const QStringList & nameFilters, Filters filters = NoFilter, SortFlags sort = NoSort ) const
Returns a list of the names of all the files and directories in the directory, ordered according to the name and attribute filters previously set with setNameFilters() and setFilter(), and sorted according to the flags set with setSorting().
The name filter, file attribute filter, and sorting specification can be overridden using the nameFilters, filters, and sort arguments.
Returns an empty list if the directory is unreadable, does not exist, or if nothing matches the specification.
