public static void main(String[] args) throws IOException {
        // Create pdf document
        PdfDocument doc = new PdfDocument();
        // Load file from disk
        doc.loadFromFile("Sample.docx");
        // Load the X509 certificate for signature
        PdfPKCS7Formatter formatter = new PdfPKCS7Formatter(new PdfCertificate("gary.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);
        // Iterate through all hash algorithm types
        for (HashAlgorithmType hashAlg : HashAlgorithmType.values()) {
        // Skip SM3 (case-insensitive)
            if ("SM3".equalsIgnoreCase(hashAlg.name())) {
                continue;
            }
            try {
                // Set the current hash algorithm
                formatter.getProperties().setHashAlgorithm(hashAlg);
                String filePath = "AddImageSignature_" + hashAlg.name() + ".pdf";
                doc.saveToFile(filePath, FileFormat.PDF);
                System.out.println("Succeed：" + hashAlg.name());
            } catch (Exception ex) {
                System.out.println("Error HashAlgorithmType：" + hashAlg.name());
                System.out.println("Error Info：" + ex.getMessage());
            }
        }
        // Close the document
        doc.close();
    }
    // Custom signature appearance implementation
    public static class PdfCustomSignatureAppearance implements IPdfSignatureAppearance {
        @Override
        public void generate(PdfCanvas pdfCanvas) {
            // Set font size
            int fontSize = 10;
            // Create Arial font
            PdfTrueTypeFont font = new PdfTrueTypeFont(new Font("Arial", Font.PLAIN, fontSize), true);
            // Set line height
            float lineHeight = fontSize;
            // Draw text string
            pdfCanvas.drawString("AAAAAAAAAAA", font, PdfBrushes.getRed(), new Point.Float(0, 0));
            // Draw image at specified position
            pdfCanvas.drawImage(PdfImage.fromFile("E-iceblue logo.png"), new Point.Float(20, 0));
        }
    }

OfdConverter converter = new OfdConverter(ofdFile.getAbsolutePath());
converter.getOptions().setDefaultFontName(fontName);
converter.toPdf(PdfPath);

CustomProgressNotifier progressNotifier =new CustomProgressNotifier(output_txt);
    ofdConverter ofdconverter=new Ofdconverter（inputPath);
    ofdconverter.registerProgressNotifier(progressNotifier);
    ofdConverter.toPdf(outputPath);

    CustomProgressNotifier progressNotifier2=new CustomProgressNotifier(output_txt2);
    PdfToWordConverter converter=new PdfTowordConverter(inputPath2);
    converter.registerProgressNotifier(progressNotifier2);
    converter.saveToDocx(outputPath2)

PdfDocument pdf = new PdfDocument();
pdf.loadFromFile(inputFile);
pdf.getViewerPreferences().setReadingDirection(PdfReadingDirection.LeftToRight);
pdf.setLanguage("zh-CN");
pdf.saveToFile(outputFile , FileFormat.PDF);

PdfDocument document = new PdfDocument();
PdfPageBase pdfPageBase = document.getPages().add();
pdfPageBase.getCanvas().drawString("Hello, World!",
new PdfFont(PdfFontFamily.Helvetica, 30f),
PdfBrushes.getBlack(), 10, 10);

PdfCertificate certificate = new PdfCertificate(path+"gary.pfx", "e-iceblue");
PdfPKCS7Formatter formatter = new PdfPKCS7Formatter(certificate, false);
String timeStampUrl = "https://rfc3161.ai.moda/adobe";
formatter.setTimestampService(new TSAHttpService(timeStampUrl));
formatter.setOCSPService(new OCSPHttpService(null));

PdfMDPSignatureMaker signatureMaker = new PdfMDPSignatureMaker (document, formatter, PdfMDPSignatureMaker.Level2Permissions);
signatureMaker.makeSignature("signName");
com.spire.pdf.interactive.digitalsignatures.PdfSignature signature = signatureMaker.getSignature();
signature.setName("Gary");
// signature.setReason("This is the final version.");
signature.setLocation("U.S.");
signature.setContactInfo("112554");

PdfSignatureAppearance appearance = new PdfSignatureAppearance(signature);
appearance.setNameLabel("Signer: ");
// appearance.setReasonLabel("Reason: ");
appearance.setLocationLabel("Location: ");
appearance.setContactInfoLabel("Phone: ");

PdfImage image = PdfImage.fromFile(path+"logo.png");
appearance.setSignatureImage(image);

appearance.setGraphicMode(GraphicMode.SignImageAndSignDetail);

Rectangle2D rect = new Rectangle2D.Float();
rect.setFrame(new Point2D.Float(90, 550), new Dimension(150, 80));

signatureMaker.makeSignature("Signature", pdfPageBase,
    (float) rect.getMinX(), (float) rect.getMinY(),
    (float) rect.getWidth(), (float) rect.getHeight(),
    appearance);

String output = "signature.pdf";
document.saveToFile(path+output, FileFormat.PDF);
document.close(); 

IAutoShape shapeFormula = slide.Shapes.AppendShape(ShapeType.Rectangle, new RectangleF(40, currentTop, shapeWidth, formulaHeight));

// Insert LaTeX formula
TextParagraph formulaPara = shapeFormula.TextFrame.Paragraphs.AddParagraphFromLatexMathCode(latex);

// Export as MathML
string mathML = formulaPara.ExportMathML();

// Export as LaTeX
string LaTex = formulaPara.ExportLaTex();

PdfDocument pdf = new PdfDocument();
pdf.loadFromFile(inputFile);
pdf.getViewerPreferences().setReadingDirection(PdfReadingDirection.LeftToRight);
pdf.setLanguage("zh-CN");
pdf.saveToFile(outputFile , FileFormat.PDF);

PdfDocument document = new PdfDocument();
PdfPageBase pdfPageBase = document.getPages().add();
pdfPageBase.getCanvas().drawString("Hello, World!",
new PdfFont(PdfFontFamily.Helvetica, 30f),
PdfBrushes.getBlack(), 10, 10);

PdfCertificate certificate = new PdfCertificate(path+"gary.pfx", "e-iceblue");
PdfPKCS7Formatter formatter = new PdfPKCS7Formatter(certificate, false);
String timeStampUrl = "https://rfc3161.ai.moda/adobe";
formatter.setTimestampService(new TSAHttpService(timeStampUrl));
formatter.setOCSPService(new OCSPHttpService(null));

PdfMDPSignatureMaker signatureMaker = new PdfMDPSignatureMaker (document, formatter, PdfMDPSignatureMaker.Level2Permissions);
signatureMaker.makeSignature("signName");
com.spire.pdf.interactive.digitalsignatures.PdfSignature signature = signatureMaker.getSignature();
signature.setName("Gary");
// signature.setReason("This is the final version.");
signature.setLocation("U.S.");
signature.setContactInfo("112554");

PdfSignatureAppearance appearance = new PdfSignatureAppearance(signature);
appearance.setNameLabel("Signer: ");
// appearance.setReasonLabel("Reason: ");
appearance.setLocationLabel("Location: ");
appearance.setContactInfoLabel("Phone: ");

PdfImage image = PdfImage.fromFile(path+"logo.png");
appearance.setSignatureImage(image);

appearance.setGraphicMode(GraphicMode.SignImageAndSignDetail);

Rectangle2D rect = new Rectangle2D.Float();
rect.setFrame(new Point2D.Float(90, 550), new Dimension(150, 80));

signatureMaker.makeSignature("Signature", pdfPageBase,
    (float) rect.getMinX(), (float) rect.getMinY(),
    (float) rect.getWidth(), (float) rect.getHeight(),
    appearance);

String output = "signature.pdf";
document.saveToFile(path+output, FileFormat.PDF);
document.close(); 

SPIRE_OFFICE_LICENSE_KEY 
SPIRE_DOC_LICENSE_KEY 
SPIRE_LICENSE_KEY

SPIRE_OFFICE_LICENSE_KEY
SPIRE_PPT_LICENSE_KEY
SPIRE_LICENSE_KEY

Before: SaveToPdf(filename, fileformat)
After: SaveToPdf(filename)

SPIRE_OFFICE_LICENSE_KEY
SPIRE_XLS_LICENSE_KEY
SPIRE_LICENSE_KEY