Compactar e descompactar

Classe utilitária para compactar e descompactar arquivos zip apartir de um stream de dados

/**
 * Compact and Unpack Zip files
 * 
 * @author Clayton.Passos
 * 
 */
public class Zip implements ICompactOperation {
    private static final int BUFFER_SIZE = 1024;

    /**
     * Compacta os arquivos da lista armazenando-os no output
     * 
     * @param fileLst
     *            List
     * @param dataOut
     * 
     * @param pathComplete
     *            Se for verdadeiro guardará todo o caminho até o arquivo

     *            Se for falso armazenará apenas o arquivo, sem o caminho
     * @throws IOException
     */
    public static void compact(List fileLst, DataOutputStream dataOut,
     boolean pathComplete) throws IOException {
 ZipOutputStream out = new ZipOutputStream(dataOut);
 out.setLevel(9);

 // Create a buffer for reading the files
 byte[] BUFFER = new byte[BUFFER_SIZE];

 // Compress the files
 FileInputStream in;
 File file;
 for (int i = 0; i < fileLst.size(); i++) {
     file = (File) fileLst.get(i);
     in = new FileInputStream(file);

     // Add ZIP entry to output stream.
     ZipEntry entry;
     if (pathComplete) { // Complete path in zip file
  entry = new ZipEntry(file.getPath());
     } else {// only file in zip file, no path
  entry = new ZipEntry(file.getName());
     }

     out.putNextEntry(entry);

     // Transfer bytes from the file to the ZIP file
     int len;
     while ((len = in.read(BUFFER)) > 0) {
  out.write(BUFFER, 0, len);
  out.flush();
     }

     // Complete the entry
     out.closeEntry();
     in.close();
 }

 // Complete the ZIP file
 out.close();
    }

    /**
     * Descompacta o arquivo no local definido por outFilesPath
     * 
     * @param dataIn
     * 
     * @param outFilesPath
     *            Local onde ficarão os arquivos
     * @throws IOException
     */
    public static void unpack(DataInputStream dataIn, String outFilesPath)
     throws IOException {
 ZipInputStream zis = new ZipInputStream(dataIn);
 ZipEntry zipEntry = null;
 byte[] BUFFER = new byte[BUFFER_SIZE];
 String path;
 while ((zipEntry = zis.getNextEntry()) != null) {
     path = outFilesPath + File.separator + zipEntry.getName();

     // if don´t exist, create this path
     new File(new File(path).getParent()).mkdirs();

     FileOutputStream fileOut = new FileOutputStream(path);
     int count;
     while ((count = zis.read(BUFFER, 0, BUFFER_SIZE)) != -1) {
  fileOut.write(BUFFER, 0, count);
     }
     fileOut.close();

 }
 zis.close();
    }
}