Unzip zip too slow with java

 public static void unzip(String zipFilePath, String destDir) throws IOException{

      try(ZipFile file = new ZipFile(zipFilePath))
        {

            FileSystem fileSystem = FileSystems.getDefault();
            //Get file entries
            Enumeration<? extends ZipEntry> entries = file.entries();

            //We will unzip files in this folder
            String uncompressedDirectory = destDir;
            Files.createDirectory(fileSystem.getPath(uncompressedDirectory));

            //Iterate over entries
            while (entries.hasMoreElements())
            {
                ZipEntry entry = entries.nextElement();
                //If directory then create a new directory in uncompressed folder
                if (entry.isDirectory())
                {
                    int h=entry.getName().indexOf('/');
                    String e=entry.getName().substring(h);
                    System.out.println("Creating Directory:" + uncompressedDirectory + e);
                    Files.createDirectories(fileSystem.getPath(uncompressedDirectory + e));
                }
                //Else create the file
                else
                {
                    InputStream is = file.getInputStream(entry);
                    BufferedInputStream bis = new BufferedInputStream(is);
                    int h=entry.getName().indexOf('/');
                    String e=entry.getName().substring(h);
                    String uncompressedFileName = uncompressedDirectory + e;
                    Path uncompressedFilePath = fileSystem.getPath(uncompressedFileName);
                    Files.createFile(uncompressedFilePath);
                    FileOutputStream fileOutput = new FileOutputStream(uncompressedFileName);
                    while (bis.available() > 0)
                    {
                        fileOutput.write(bis.read());
                    }
                    fileOutput.close();
                    System.out.println("Written :" + entry.getName());
                }
            }
            file.close();
            File f = new File(zipFilePath);
            f.delete();
            log.info("Se ha realizado la descompresion de la nueva version");
        }
        catch(IOException e)
        {
            e.printStackTrace();
        }

}

I would like if there is some part of the code that can be changed to decompress zips faster. The problem is that I have to decompress zips of more than 20 MB and it takes each of them like 5 or 6 minutes.