import com.drew.metadata.exif.ExifDirectoryBase; //导入依赖的package包/类
private static int getOrientation(byte[] data) {
  InputStream is = null;
  try {
    is = new ByteArrayInputStream(data);
    Metadata metadata = ImageMetadataReader.readMetadata(is);
    Collection<ExifIFD0Directory> directories = metadata.getDirectoriesOfType(ExifIFD0Directory.class);
    for(ExifIFD0Directory directory : directories) {
      if(directory.containsTag(ExifDirectoryBase.TAG_ORIENTATION)) {
        return directory.getInt(ExifDirectoryBase.TAG_ORIENTATION);
      }
    }

    return ExifInterface.ORIENTATION_NORMAL;
  }
  catch (Exception e) {
    return ExifInterface.ORIENTATION_NORMAL;
  }
  finally {
    if(is != null) try { is.close(); } catch(Exception ignore) {}
  }
}
 

import com.drew.metadata.exif.ExifDirectoryBase; //导入依赖的package包/类
protected void getJpegData(byte[] toMatch, int i, List<Integer> offsets, int resultIndex) {
    try {
        Metadata reader = JpegMetadataReader
                .readMetadata(new ByteArrayInputStream(Arrays.copyOfRange(toMatch, i - offsets.get(resultIndex), toMatch.length)));
        ExifIFD0Directory info = reader.getFirstDirectoryOfType(ExifIFD0Directory.class);
        String cameraMake = null;
        String cameraModel = null;
        if (info != null) {
            cameraMake = info.getString(ExifDirectoryBase.TAG_MAKE);
            cameraModel = info.getString(ExifDirectoryBase.TAG_MODEL);
        }
        for (Directory dir : reader.getDirectoriesOfType(GpsDirectory.class)) {
            GpsDescriptor descriptor = new GpsDescriptor((GpsDirectory) dir);

            Map<String, String> gpsInfoDict = new LinkedHashMap<>();
            gpsInfoDict.put("Camera Make: ", cameraMake);
            gpsInfoDict.put("Camera Model: ", cameraModel);
            gpsInfoDict.put("Latitude: ", tagOrEmpty(descriptor.getGpsLatitudeDescription()));
            gpsInfoDict.put("Longitude: ", tagOrEmpty(descriptor.getGpsLongitudeDescription()));
            gpsInfoDict.put("Altitude: ", descriptor.getGpsAltitudeDescription());
            gpsInfoDict.put("Altitude Reference: ", descriptor.getGpsAltitudeRefDescription());
            gpsInfoDict.put("Timestamp: ", descriptor.getGpsTimeStampDescription());

            if (notEmptyGPS(descriptor.getGpsLatitudeDescription(), descriptor.getGpsLongitudeDescription())) {
                logGPS(gpsInfoDict);
                wasGPSFound = true;
            }

        }

    }
    catch (IOException | ImageProcessingException e) {
        e.printStackTrace();
    }
}
 

import com.drew.metadata.exif.ExifDirectoryBase; //导入依赖的package包/类
public static ImageInformation readImageInformation(File imageFile)  throws IOException, MetadataException, ImageProcessingException {
    Metadata metadata = ImageMetadataReader.readMetadata(imageFile);
    ExifDirectoryBase exifDirectoryBase = metadata.getFirstDirectoryOfType(ExifDirectoryBase.class);
    JpegDirectory jpegDirectory = metadata.getFirstDirectoryOfType(JpegDirectory.class);
    IptcDirectory ipTCdirectory = metadata.getFirstDirectoryOfType(IptcDirectory.class);

    int orientation = 1;
    Date dateTaken = null;
    String uniqueID = "";

    if( exifDirectoryBase != null )
    {
        if( exifDirectoryBase.containsTag(ExifIFD0Directory.TAG_ORIENTATION))
            orientation = exifDirectoryBase.getInt(ExifIFD0Directory.TAG_ORIENTATION);

    }

    ExifSubIFDDirectory exifSubIFDDirectory = metadata.getFirstDirectoryOfType(ExifSubIFDDirectory.class);

    if( exifSubIFDDirectory != null )
    {
        if( exifSubIFDDirectory.containsTag( ExifDirectoryBase.TAG_IMAGE_UNIQUE_ID ))
            uniqueID = exifSubIFDDirectory.getString(ExifDirectoryBase.TAG_IMAGE_UNIQUE_ID);

        if( exifSubIFDDirectory.containsTag( ExifDirectoryBase.TAG_DATETIME ))
            dateTaken = exifSubIFDDirectory.getDate( ExifDirectoryBase.TAG_DATETIME );

        if( dateTaken == null && exifSubIFDDirectory.containsTag( ExifIFD0Directory.TAG_DATETIME_ORIGINAL ))
           dateTaken = exifSubIFDDirectory.getDate(ExifDirectoryBase.TAG_DATETIME_ORIGINAL);

        if( dateTaken == null && exifSubIFDDirectory.containsTag( ExifIFD0Directory.TAG_DATETIME_DIGITIZED ))
            dateTaken = exifSubIFDDirectory.getDate(ExifDirectoryBase.TAG_DATETIME_DIGITIZED);

        if( dateTaken == null )
            dateTaken = getCreationTime( imageFile );
    }

    boolean hasDeleteTag = false;

    if( ipTCdirectory != null && ipTCdirectory.getKeywords() != null )
    {
        if( containsCaseInsensitive( ipTCdirectory.getKeywords(), "delete") )
            hasDeleteTag = true;
    }

    int width = jpegDirectory.getImageWidth();
    int height = jpegDirectory.getImageHeight();

    return new ImageInformation(orientation, width, height, hasDeleteTag, uniqueID, dateTaken );
}