/**
* See {@link #zipDirectory(File, ZipOutputStream, FilenameFilter)}, this version handles the
* prefix needed to recursively zip data preserving the relative path of each
*/
private static void zipDirectory(
File directory, String prefix, ZipOutputStream zipout, final FilenameFilter filter)
throws IOException, FileNotFoundException {
File[] files = directory.listFiles(filter);
// copy file by reading 4k at a time (faster than buffered reading)
byte[] buffer = new byte[4 * 1024];
for (File file : files) {
if (file.exists()) {
if (file.isDirectory()) {
// recurse and append
zipDirectory(file, prefix + file.getName() + "/", zipout, filter);
} else {
ZipEntry entry = new ZipEntry(prefix + file.getName());
zipout.putNextEntry(entry);
InputStream in = new FileInputStream(file);
int c;
try {
while (-1 != (c = in.read(buffer))) {
zipout.write(buffer, 0, c);
}
zipout.closeEntry();
} finally {
in.close();
}
}
}
}
zipout.flush();
}
/**
* Zips up the directory contents into the specified {@link ZipOutputStream}.
*
* <p>Note this method does not take ownership of the provided zip output stream, meaning the
* client code is responsible for calling {@link ZipOutputStream#finish() finish()} when it's done
* adding zip entries.
*
* @param directory The directory whose contents have to be zipped up
* @param zipout The {@link ZipOutputStream} that will be populated by the files found
* @param filter An optional filter that can be used to select only certain files. Can be null, in
* that case all files in the directory will be zipped
* @throws IOException
* @throws FileNotFoundException
*/
public static void zipDirectory(
File directory, ZipOutputStream zipout, final FilenameFilter filter)
throws IOException, FileNotFoundException {
zipDirectory(directory, "", zipout, filter);
}
