Document doc = new Document();
//load .md file
doc.loadFromFile("input.md");
//save to .md file
doc.saveToFile("output.md", com.spire.doc.FileFormat.Markdown);
//save to .docx file
//doc.saveToFile("output.docx", com.spire.doc.FileFormat.Docx);
//save to .doc file
//doc.saveToFile("output.doc", com.spire.doc.FileFormat.Doc);
//save to .pdf file
//doc.saveToFile("output.pdf", com.spire.doc.FileFormat.PDF);
doc.close();

Document doc = new Document();
//load .docx file
doc.loadFromFile("input.docx");
//load .doc file
//doc.loadFromFile("input.doc");
//save to .md file
doc.saveToFile("output.md", com.spire.doc.FileFormat.Markdown);
doc.close();

PdfDocument pdf = new PdfDocument();
pdf.loadFromFile(inputFile);
PdfPageBase page = pdf.getPages().get(0);
PdfTextFinder finds = new PdfTextFinder(page);
finds.getOptions().setTextFindParameter(EnumSet.of(TextFindParameter.IgnoreCase));
List<PdfTextFragment> result = finds.findAllText(page);
StringBuilder str = new StringBuilder();
for (PdfTextFragment find : result)
{
	str.append("FontName："+find.getTextStates()[0].getFontName());
	str.append("FontSize："+find.getTextStates()[0].getFontSize());
	str.append("FontFamily："+find.getTextStates()[0].getFontFamily());
	str.append("Bold："+find.getTextStates()[0].isBold());
	str.append("Italic："+find.getTextStates()[0].isItalic());
	str.append("ForegroundColor："+find.getTextStates()[0].getForegroundColor());
}

PdfDocument doc = new PdfDocument();
doc.loadFromFile("input.pdf");
PdfTextReplaceOptions textReplaceOptions = new PdfTextReplaceOptions();
textReplaceOptions.setReplaceType(EnumSet.of(ReplaceActionType.Regex));
PdfPageBase page = doc.getPages().get(0);
PdfTextReplacer textReplacer = new PdfTextReplacer(page);
textReplacer.setOptions(textReplaceOptions);
String regularExpression = "\\bS\\w*L\\b";
textReplacer.replaceAllText(regularExpression, "NEW");
doc.saveToFile("output.pdf");
doc.dispose();  

Workbook workbook = new Workbook();
workbook.loadFromFile("1.xlsx");
Worksheet sheet = workbook.getWorksheets().get(0);
FileOutputStream stream = new FileOutputStream(outputFile);
Dimension dimension = sheet.toSVGStream(stream, sheet.getFirstRow(), sheet.getFirstColumn(), sheet.getLastRow(), sheet.getLastColumn());
double Height = dimension.getHeight();
double Width = dimension.getWidth();

BarcodeSettings barCodeSetting = new BarcodeSettings();
BufferedImage image = ImageIO.read(new File("Image/1.png"));
barCodeSetting.setQRCodeLogoImage(image);