如何使用apache commons io复制空目录？

Question

I want to copy a directory tree with empty (but necessary!) directories with apache commons io 2.1 . But it doesn't copy empty directories!

My code looks like this:

FileUtils.copyDirectory(new File(sourceDir), new File(targetDir));

Can I tell FileUtils to copy empty directories too? Or is it a bug in "commons io"?

Answer 1

I just tested this myself using apache commons 2.1 (using the code line below) and for me it does copy empty directories too.

FileUtils.copyDirectory(new File("/home/aioobe/tmp/new_test"),
                        new File("/home/aioobe/tmp/new_test_2"));

with this structure

/home/aioobe/tmp/new_test
  hello.txt
  emptyDir/

Both hello.txt and emptyDir showed up in new_test_2 as well.

Perhaps an SSCCE would be useful.