PdfDocument doc = new PdfDocument();
        //Load file from disk
        doc.loadFromFile(inputFile);
        // Load the X509 certificate for signature.
        PdfPKCS7Formatter formatter = new PdfPKCS7Formatter(new PdfCertificate(inputFile_pfx, "e-iceblue"), false);

        // Create an instance of PdfOrdinarySignatureMaker using the loaded document and certificate.
        PdfOrdinarySignatureMaker signatureMaker = new PdfOrdinarySignatureMaker(doc, formatter);

        // Create an instance of PdfCustomSignatureAppearance as the appearance for the signature.
        IPdfSignatureAppearance signatureAppearance = new PdfCustomSignatureAppearance();

        // Make the signature with a specified name and the custom appearance.
        signatureMaker.makeSignature("Signature", signatureAppearance);
        for (HashAlgorithmType hashAlg : HashAlgorithmType.values()) { 
            if ("SM3".equalsIgnoreCase(hashAlg.name())) 
			{
                continue;
            }
                // Set the current hash algorithm
formatter.getProperties().setHashAlgorithm(hashAlg);
                String filePath = outputFile + "AddImageSignature_" + hashAlg.name() + ".pdf";
                doc.saveToFile(filePath, FileFormat.PDF);
        }
        doc.close();
    }
    public static class PdfCustomSignatureAppearance implements IPdfSignatureAppearance {
        public void generate(PdfCanvas pdfCanvas) {
            int fontSize = 10;
            PdfTrueTypeFont font = new PdfTrueTypeFont("Arial", 0,10, true);
            float lineHeight = fontSize;
            pdfCanvas.drawString("AAAAAAAAAAA", font, PdfBrushes.getRed(), 0, 0);
            pdfCanvas.drawImage(PdfImage.fromFile(ExStoragePath + "data/E-logo.png"), 20, 0);
        }
    }

// Register a progress notifier when saving a PDF document
        PdfDocument pdf = new PdfDocument();
        pdf.loadFromFile(inputFile);
        pdf.registerProgressNotifier(new CustomProgressNotifier(outputFile_T));
        pdf.saveToFile(outputFile, FileFormat.XPS);
        pdf.dispose();

        // Register a progress notifier when converting PDF to Word
        PdfToWordConverter converter = new PdfToWordConverter(inputFile);
        converter.registerProgressNotifier(new CustomProgressNotifier(outputFile_T));
        converter.saveToDocx(outputFile);

        // Register a progress notifier when converting OFD to PDF
        OfdConverter ofdConverter = new OfdConverter(inputFile);
        ofdConverter.registerProgressNotifier(new CustomProgressNotifier(outputFile_T));
        ofdConverter.toPdf(outputFile);

        // Custom progress notifier, receives the progress in percent
        public class CustomProgressNotifier implements IProgressNotifier {
            private String outputFile;
            private StringBuilder str = new StringBuilder();

            public CustomProgressNotifier(String outputFile) {
                this.outputFile = outputFile;
            }

            @Override
            public void notify(float progress) {
                str.append("Progress: ").append(progress).append("%\n");
                try {
                    Files.writeString(Paths.get(outputFile), str.toString());
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        }