Java library for reading and writing IPTC metadata to JPEG and TIFF

Question

Does anyone know some opensource Java library for reading and writing IPTC metadata to JPEG and TIFF? Now I\'m using Apache Sanselan. Unfortunately, it can onl

Answer 1

For reading metadata I think you should have a look on "metadata-extractor" - an Open Source Project (Apache 2.0 licence) that develops a Java library for reading metadata from image files.

At the moment, this project can get access to the following metadata of images:

• Exif
• IPTC
• XMP
• JFIF / JFXX
• ICC Profiles
• Photoshop fields

The "metadata-extractor" is hosted at google code.

Here is a little straightforward code-example for the 2.4.0 version:

public void example() throws Exception {
    File jpegFile = new File("yourJpgFile.jpg");
    Metadata metadata = ImageMetadataReader.readMetadata(jpegFile);

    Iterator directory = metadata.getDirectoryIterator();
    while (directory.hasNext()) {
        Object tag = directory.next();
        if (tag instanceof ExifDirectory) {
            Iterator tags = ((ExifDirectory) tag).getTagIterator();
            while (tags.hasNext()) {
                System.out.println("EXIF: "+tags.next().toString());
            }
        } else if (tag instanceof IptcDirectory) {
            Iterator tags = ((IptcDirectory) tag).getTagIterator();
            while (tags.hasNext()) {
                System.out.println("IPTC: "+tags.next().toString());
            }
        } else if (tag instanceof JpegDirectory) {
            Iterator tags = ((JpegDirectory) tag).getTagIterator();
            while (tags.hasNext()) {
                System.out.println("JPEG: "+tags.next().toString());
            }
        } else {
            System.err.println(tag.getClass());
        }           
    }
}