java created zip file with directory inside cannot unzip by winrar

Question

I have created a zip file using java zip utility and I have following directory structure inside that zip file.

1. test.txt - file
2. mylabel.lbl - file
3. aux - directory (inside this directory I have some other files like following)

   1. myfile.lbl
   2. firstfile.txt

String dir = "aux\\";
        Iterator<LabelFile> i = auxLabelFiles.iterator();
        while (i.hasNext()) {
            LabelFile labelFile = i.next();
            String lableFileName = labelFile.getMetadata().getLabelFileName();
            zipEncorder.addToZip(dir + lableFileName, labelFile.getMedia().getByteData());
        }

This is code only 'aux' directory and once the file is downloaded in can be opened with 7zip and shows directory structure correctly.

When I try to unzip zip file with WinRAR it unzips all only outer directory files with an error message. 'cannot create aux\myfile.lbl system cannot find the path specified'

I cannot guess is this an issue with the file was created or WinRAR issue.

Any comment is appreciated.

Thanks, Dil.

Answer 1

The problem is directory aux in the ZIP archive as AUX is a reserved name which cannot be used as name for a file or directory on Windows, see MSDN article Naming Files, Paths, and Namespaces. Therefore renaming the directory to something different like Auxiliary solves the problem.