Java 7 is supposed to fix an old problem with unpacking zip archives with character sets other than UTF-8. This can be achieved by constructor ZipInputStream(InputStre
OMG, I played around for two or so hours, but just five minutes after I finally posted the question here, I bumped into the answer: My zip file was not encoded with ISO-8859-1, but with Cp437. So the constructor call should be:
zipStream = new ZipInputStream(
new BufferedInputStream(new FileInputStream(archiveFile), BUFFER_SIZE),
Charset.forName("Cp437")
);
Now it works like a charm. Sorry for bothering you anyway. I hope this helps someone else facing similar problems.