source: josm/src/org/openstreetmap/josm/tools/ExifReader.java@ 99

package org.openstreetmap.josm.tools;

import java.io.File;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Iterator;

import com.drew.imaging.jpeg.JpegMetadataReader;
import com.drew.metadata.Directory;
import com.drew.metadata.Metadata;
import com.drew.metadata.Tag;

/**
 * Read out exif file information from a jpeg file
 * @author Imi
 */
public class ExifReader {

        @SuppressWarnings("unchecked") public static Date readTime(File filename) {
                try {
                Metadata metadata = JpegMetadataReader.readMetadata(filename);
                for (Iterator<Directory> dirIt = metadata.getDirectoryIterator(); dirIt.hasNext();) {
                    for (Iterator<Tag> tagIt = dirIt.next().getTagIterator(); tagIt.hasNext();) {
                        Tag tag = tagIt.next();
                        if (tag.getTagType() == 0x132 || tag.getTagType() == 0x9003 || tag.getTagType() == 0x9004)
                                return new SimpleDateFormat("yyyy:MM:dd HH:mm:ss").parse(tag.getDescription());
                    }
                }
        } catch (Exception e) {
                e.printStackTrace();
        }
                return null;
        }
}