A bad way to zip 800,000 files in a directory

bad-zip-code.java

public void zipFiles(File folderToZip, String zipFileToCreate)
{
  ZipOutputStream zipStream = new ZipOutputStream(new FileOutputStream(zipFileToCreate));      
  File[] files = folderToZip.listFiles();
  for (File file : files)
  {
    String fileAbsolutePath = file.getAbsolutePath();
    String zipEntryName = fileAbsolutePath.substring(folderToZip.getAbsolutePath().length() + 1);
    FileInputStream inputStream = new FileInputStream(file);
    ZipEntry zipEntry = new ZipEntry(zipEntryName);
    try
    {
      zipStream.putNextEntry(zipEntry);
      int temp;
      while ((temp = bis.read()) != -1)
        zipOutputStream.write(temp);
    }
    finally 
    {
      zipStream.closeEntry();
      inputStream.close();
    }
  }
  
  zipStream.finish();
  zipStream.close();

}