首先，您必须将新值设置为字典中的 URI 键
annotationAction：
if (annotationAction.get(PdfName.S).equals(PdfName.URI)) { final PdfString destination = annotationAction.getAsString(PdfName.URI); final String url = destination.toString(); System.out.println(url); String updatedUrl = [... url changed to match the changed criteria ...]; annotationAction.put(PdfName.URI, new PdfString(updatedUrl));}之后，您必须通过应用来保存更改，
PdfStamper而无需采取进一步的操作：
final byte[] data = ByteStreams.toByteArray(istream);pdfs.add(data);final PdfReader reader = new PdfReader(data);final PdfDictionary pageDictionary = reader.getPageN(36);final PdfArray annotations = pageDictionary.getAsArray(PdfName.ANNOTS);if (annotations != null && annotations.size() != 0) { [...]}new PdfStamper(reader, new FileOutputStream(dir + name + "-new.pdf")).close();
