Apache Commons Unzip method?

Question

I've recently discovered https://commons.apache.org/proper/commons-compress/zip.html, the Apache Commons Compress library.

However, there is no direct method to simply unzip a given file to a particular directory.

Is there a canonical / easy way to do this?

Answer 1

Some sample code using IOUtils:

public static void unzip(Path path, Charset charset) throws IOException{
    String fileBaseName = FilenameUtils.getBaseName(path.getFileName().toString());
    Path destFolderPath = Paths.get(path.getParent().toString(), fileBaseName);

    try (ZipFile zipFile = new ZipFile(path.toFile(), ZipFile.OPEN_READ, charset)){
        Enumeration<? extends ZipEntry> entries = zipFile.entries();
        while (entries.hasMoreElements()) {
            ZipEntry entry = entries.nextElement();
            Path entryPath = destFolderPath.resolve(entry.getName());
            if (entry.isDirectory()) {
                Files.createDirectories(entryPath);
            } else {
                Files.createDirectories(entryPath.getParent());
                try (InputStream in = zipFile.getInputStream(entry)){
                    try (OutputStream out = new FileOutputStream(entryPath.toFile())){
                        IOUtils.copy(in, out);                          
                    }
                }
            }
        }
    }
}