我們需要更改 pdf 中的超鏈接。有很多以 p- 開(kāi)頭的超鏈接，我們需要?jiǎng)h除 p-。到目前為止，我們能夠讀取超鏈接。有人知道如何編輯它們并保存 pdf 嗎？謝謝public static void main(final String[] args) { final List<byte[]> pdfs = new ArrayList<>(); final List<String> testfiles = Arrays.asList("72076.5.1.pdf"); final String dir = "C:\\Entwicklung\\testaround\\pdf\\"; for (final String name : testfiles) { final File file = new File(dir + name); final Path path = Paths.get(file.toURI()); try (InputStream istream = new FileInputStream(path.toFile())) { 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) { for (int i = 0; annotations.size() > i; i++) { final PdfObject annot = annotations.getDirectObject(i); final PdfDictionary annotationDictionary = (PdfDictionary)PdfReader.getPdfObject(annot); if (annotationDictionary.get(PdfName.SUBTYPE).equals(PdfName.LINK)) { final PdfDictionary annotationAction = annotationDictionary.getAsDict(PdfName.A); if (annotationAction.get(PdfName.S).equals(PdfName.URI)) { final PdfString destination = annotationAction.getAsString(PdfName.URI); final String url = destination.toString(); System.out.println(url); } } } }
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TA貢獻(xiàn)2011條經(jīng)驗(yàn) 獲得超2個(gè)贊
首先，您必須將新值設(shè)置為字典中的URIannotationAction鍵：
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，您必須通過(guò)應(yīng)用保存更改而PdfStamper無(wú)需執(zhí)行進(jìn)一步操作：
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();
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