Question

我想更新.jpg＆amp;的元数据（如标签，评论等......） .tif文件使用JAVA 任何人都可以帮我举例......

我使用apache poi为docx文件做了同样的事情

      OPCPackage opc = OPCPackage.open("metadata.docx");
      PackageProperties pp = opc.getPackageProperties();

      Nullable<String> foo = pp.getLastModifiedByProperty();
      System.out.println(foo.hasValue()?foo.getValue():"empty");
      //Set some properties
      pp.setCreatorProperty("M Kazarian");
      pp.setLastModifiedByProperty("M Kazarian " + System.currentTimeMillis());
      pp.setModifiedProperty(new Nullable<Date>(new Date()));
      pp.setTitleProperty("M Kazarian document");

注意：然后请提及我应该下载的jar和＆amp;导入以更新元数据。

提前感谢....

Answer 1

尝试使用commons imaging

Here是如何更新JPEG元数据的示例：

public void changeExifMetadata(final File jpegImageFile, final File dst)
        throws IOException, ImageReadException, ImageWriteException {
    OutputStream os = null;
    boolean canThrow = false;
    try {
        TiffOutputSet outputSet = null;

        final IImageMetadata metadata = Imaging.getMetadata(jpegImageFile);
        final JpegImageMetadata jpegMetadata = (JpegImageMetadata) metadata;
        if (null != jpegMetadata) {
            final TiffImageMetadata exif = jpegMetadata.getExif();

            if (null != exif) {
                outputSet = exif.getOutputSet();
            }
        }

        if (null == outputSet) {
            outputSet = new TiffOutputSet();
        }

        {
            final TiffOutputDirectory exifDirectory = outputSet
                    .getOrCreateExifDirectory();
            exifDirectory
                    .removeField(ExifTagConstants.EXIF_TAG_APERTURE_VALUE);
            exifDirectory.add(ExifTagConstants.EXIF_TAG_APERTURE_VALUE,
                    RationalNumber.factoryMethod(3, 10));
        }

        {
            final double longitude = -74.0; 
            final double latitude = 40 + 43 / 60.0; 

            outputSet.setGPSInDegrees(longitude, latitude);
        }

        os = new FileOutputStream(dst);
        os = new BufferedOutputStream(os);

        new ExifRewriter().updateExifMetadataLossless(jpegImageFile, os,
                outputSet);

        canThrow = true;
    } finally {
        IoUtils.closeQuietly(canThrow, os);
    }
}

Answer 2

javax.imageio.metadata包含与元数据相关的类。 IIOMetadata类对您有用。请尝试

write(IIOMetadata streamMetadata,IIOImage image,ImageWriteParam param)

ImageWriter类中的

方法。

如何在JAVA中更新jpg，tiff文件的元数据值？

2 个答案: