How to read file from ZIP using InputStream?

Question

I must get file content from ZIP archive (only one file, I know its name) using SFTP. The only thing I\'m having is ZIP\'s InputStream. Most examples show how g

Answer 1

Unzip archive (zip) with preserving file structure into given directory. Note; this code use deps on "org.apache.commons.io.IOUtils"), but you can replace it by yours custom 'read-stream' code

public static void unzipDirectory(File archiveFile, File destinationDir) throws IOException
{
  Path destPath = destinationDir.toPath();
  try (ZipInputStream zis = new ZipInputStream(new FileInputStream(archiveFile)))
  {
    ZipEntry zipEntry;
    while ((zipEntry = zis.getNextEntry()) != null)
    {
      Path resolvedPath = destPath.resolve(zipEntry.getName()).normalize();
      if (!resolvedPath.startsWith(destPath))
      {
        throw new IOException("The requested zip-entry '" + zipEntry.getName() + "' does not belong to the requested destination");
      }
      if (zipEntry.isDirectory())
      {
        Files.createDirectories(resolvedPath);
      } else
      {
        if(!Files.isDirectory(resolvedPath.getParent()))
        {
          Files.createDirectories(resolvedPath.getParent());
        }
        try (FileOutputStream outStream = new FileOutputStream(resolvedPath.toFile()))
        {
          IOUtils.copy(zis, outStream);
        }
      }
    }
  }
}