List directories with given name recursively with Java [duplicate]

Question

This question already has answers here:

Recursively finding only directories with FileUtils.listFiles (6 answers)

Closed 8 years ago.

I want to collect all (sub-)directories within directory matching a given name using Apache IO Commons. While I can solve this task for files using a NameFileFilter in combination with FileUtils.listFiles, I can't find a solution to do this for folders.

I tried the following snippet:

IOFileFilter fileFilter = new NameFileFilter(fileName);
Collection<File> fileList = FileUtils.listFilesAndDirs(rootFolder, fileFilter, TrueFileFilter.INSTANCE);

It identifies folders and subfolders, but does not filter them according to the NameFileFilter. What am I doing wrong?

Answer 1

Your code only looks for files with this name, not for any directories.

This should work:

IOFileFilter nameFilter = new NameFileFilter(fileName);
Collection<File> fileList = FileUtils.listFilesAndDirs(rootFolder, 
  new NotFileFilter(TrueFileFilter.INSTANCE),
  nameFilter);