Java PdfContentByte.showText方法代码示例

import com.itextpdf.text.pdf.PdfContentByte; //导入方法依赖的package包/类
/**
 * Update NDA file with visitor name and visitor signature.
 * 
 * @param destFile 
 * @param signatureImage signature file
 * @param visitorName
 * @return File
 */
public static File build(Path destFile, File signatureImage, String visitorName) {
	try {
		PdfReader pdfReader = new PdfReader(ndaUrl);
		PdfStamper pdfStamper = new PdfStamper(pdfReader,
				new FileOutputStream(destFile.toString()));
		Image image = createNDAImage(signatureImage, 0, 0);
		PdfContentByte over = pdfStamper.getOverContent(5);
		over.addImage(image);
		PdfContentByte pdfContentByte = pdfStamper.getOverContent(5);
		pdfContentByte.beginText();
		pdfContentByte.setFontAndSize(BaseFont.createFont
				(BaseFont.HELVETICA, 
						BaseFont.CP1257, 
						BaseFont.EMBEDDED
						)
				, 10); 
		pdfContentByte.setTextMatrix(112, 428); 
		pdfContentByte.showText(visitorName);
		pdfContentByte.setTextMatrix(89, 406);
		pdfContentByte.showText(new SimpleDateFormat("E, dd MMM yyyy").format(new Date()));
		pdfContentByte.endText();
		pdfStamper.close();
		return destFile.toFile();
	} catch (IOException | DocumentException | NumberFormatException e) {
		logger.error("Exception while generating NDA file. ",e);
		return null;
	}
}
 

import com.itextpdf.text.pdf.PdfContentByte; //导入方法依赖的package包/类
@Override
public void onEndPage(final PdfWriter writer,
                      final Document document) {
  final PdfContentByte cb = writer.getDirectContent();
  cb.saveState();

  // compose the footer
  final String text = "Page "
      + writer.getPageNumber() + " of ";
  final float textSize = _headerFooterFont.getWidthPoint(text, 12);
  final float textBase = document.bottom() - 20;
  cb.beginText();
  cb.setFontAndSize(_headerFooterFont, 12);

  final float adjust = _headerFooterFont.getWidthPoint("0", 12);
  cb.setTextMatrix(document.right()
      - textSize - adjust, textBase);
  cb.showText(text);
  cb.endText();
  cb.addTemplate(_tpl, document.right()
      - adjust, textBase);

  cb.restoreState();
}
 

import com.itextpdf.text.pdf.PdfContentByte; //导入方法依赖的package包/类
@Override
public void onEndPage(final PdfWriter writer,
                      final Document document) {
  final PdfContentByte cb = writer.getDirectContent();
  cb.saveState();

  // compose the footer

  final float textSize = _headerFooterFont.getWidthPoint(_legendText, 12);
  final float textBase = document.bottom()
      - 20;
  cb.beginText();
  cb.setFontAndSize(_headerFooterFont, 12);

  final float adjust = _headerFooterFont.getWidthPoint("0", 12);
  cb.setTextMatrix(document.right()
      - textSize
      - adjust, textBase);
  cb.showText(_legendText);
  cb.endText();
  cb.addTemplate(_tpl, document.right()
      - adjust, textBase);

  cb.restoreState();
}
 

import com.itextpdf.text.pdf.PdfContentByte; //导入方法依赖的package包/类
/**
 * The <code>addImageToPdf</code> method is used to add image to pdf and make it searchable by adding image text in invisible mode
 * w.r.t parameter 'isPdfSearchable' passed.
 * 
 * @param pdfWriter {@link PdfWriter} writer of pdf in which image has to be added
 * @param htmlUrl {@link HocrPage} corresponding html file for fetching text and coordinates
 * @param imageUrl {@link String} url of image to be added in pdf
 * @param isPdfSearchable true for searchable pdf else otherwise
 * @param widthOfLine
 */
private void addImageToPdf(PdfWriter pdfWriter, HocrPage hocrPage, String imageUrl, boolean isPdfSearchable, final int widthOfLine) {
	if (null != pdfWriter && null != imageUrl && imageUrl.length() > 0) {
		try {
			LOGGER.info("Adding image" + imageUrl + " to pdf using iText");
			Image pageImage = Image.getInstance(imageUrl);
			float dotsPerPointX = pageImage.getDpiX() / PDF_RESOLUTION;
			float dotsPerPointY = pageImage.getDpiY() / PDF_RESOLUTION;
			PdfContentByte pdfContentByte = pdfWriter.getDirectContent();

			pageImage.scaleToFit(pageImage.getWidth() / dotsPerPointX, pageImage.getHeight() / dotsPerPointY);

			pageImage.setAbsolutePosition(0, 0);

			// Add image to pdf
			pdfWriter.getDirectContentUnder().addImage(pageImage);
			pdfWriter.getDirectContentUnder().add(pdfContentByte);

			// If pdf is to be made searchable
			if (isPdfSearchable) {
				LOGGER.info("Adding invisible text for image: " + imageUrl);
				float pageImagePixelHeight = pageImage.getHeight();
				Font defaultFont = FontFactory.getFont(FontFactory.HELVETICA, 8, Font.BOLD, CMYKColor.BLACK);

				// Fetch text and coordinates for image to be added
				Map<String, int[]> textCoordinatesMap = getTextWithCoordinatesMap(hocrPage, widthOfLine);
				Set<String> ketSet = textCoordinatesMap.keySet();

				// Add text at specific location
				for (String key : ketSet) {
					int[] coordinates = textCoordinatesMap.get(key);
					float bboxWidthPt = (coordinates[2] - coordinates[0]) / dotsPerPointX;
					float bboxHeightPt = (coordinates[3] - coordinates[1]) / dotsPerPointY;
					pdfContentByte.beginText();

					// To make text added as invisible
					pdfContentByte.setTextRenderingMode(PdfContentByte.TEXT_RENDER_MODE_INVISIBLE);
					pdfContentByte.setLineWidth(Math.round(bboxWidthPt));

					// Ceil is used so that minimum font of any text is 1
					// For exception of unbalanced beginText() and endText()
					if (bboxHeightPt > 0.0) {
						pdfContentByte.setFontAndSize(defaultFont.getBaseFont(), (float) Math.ceil(bboxHeightPt));
					} else {
						pdfContentByte.setFontAndSize(defaultFont.getBaseFont(), 1);
					}
					float xCoordinate = (float) (coordinates[0] / dotsPerPointX);
					float yCoordinate = (float) ((pageImagePixelHeight - coordinates[3]) / dotsPerPointY);
					pdfContentByte.moveText(xCoordinate, yCoordinate);
					pdfContentByte.showText(key);
					pdfContentByte.endText();
				}
			}
			pdfContentByte.closePath();
		} catch (BadElementException badElementException) {
			LOGGER
					.error("Error occurred while adding image" + imageUrl + " to pdf using Itext: "
							+ badElementException.toString());
		} catch (DocumentException documentException) {
			LOGGER.error("Error occurred while adding image" + imageUrl + " to pdf using Itext: " + documentException.toString());
		} catch (MalformedURLException malformedURLException) {
			LOGGER.error("Error occurred while adding image" + imageUrl + " to pdf using Itext: "
					+ malformedURLException.toString());
		} catch (IOException ioException) {
			LOGGER.error("Error occurred while adding image" + imageUrl + " to pdf using Itext: " + ioException.toString());
		}
	}
}
 

import com.itextpdf.text.pdf.PdfContentByte; //导入方法依赖的package包/类
static byte[] createClippingTextPdf() throws DocumentException, IOException
{
    ByteArrayOutputStream baos = new ByteArrayOutputStream();

    Document document = new Document();
    PdfWriter writer = PdfWriter.getInstance(document, baos);
    document.open();

    PdfContentByte directContent = writer.getDirectContent();
    directContent.beginText();
    directContent.setTextRenderingMode(PdfPatternPainter.TEXT_RENDER_MODE_CLIP);
    directContent.setTextMatrix(AffineTransform.getTranslateInstance(100, 400));
    directContent.setFontAndSize(BaseFont.createFont(), 100);
    directContent.showText("Test");
    directContent.endText();
    
    BufferedImage bim = new BufferedImage(500, 500, BufferedImage.TYPE_INT_RGB);
    Graphics2D g2d = bim.createGraphics();
    g2d.setColor(Color.BLUE);
    g2d.fillRect(0, 0, 500, 500);
    g2d.dispose();

    Image image = Image.getInstance(bim, null);
    directContent.addImage(image, 500, 0, 0, 599, 50, 50);
    document.close();

    return baos.toByteArray();
}
 

import com.itextpdf.text.pdf.PdfContentByte; //导入方法依赖的package包/类
/**
 * <a href="http://stackoverflow.com/questions/34734669/define-background-color-and-transparency-of-link-annotation-in-pdf">
 * Define background color and transparency of link annotation in PDF
 * </a>
 * <p>
 * This test creates a link annotation with custom appearance. Adobe Reader chooses
 * to ignore it but other viewers use it. Interestingly Adobe Acrobat export-as-image
 * does use the custom appearance...
 * </p>
 */
@Test
public void testCreateLinkWithAppearance() throws IOException, DocumentException
{
    Document doc = new Document();
    PdfWriter writer = PdfWriter.getInstance(doc, new FileOutputStream(new File(RESULT_FOLDER, "custom-link.appearance.pdf")));
    writer.setCompressionLevel(0);
    doc.open();

    BaseFont baseFont = BaseFont.createFont();
    int fontSize = 15;
    doc.add(new Paragraph("Hello", new Font(baseFont, fontSize)));
    
    PdfContentByte content = writer.getDirectContent();
    
    String text = "Test";
    content.setFontAndSize(baseFont, fontSize);
    content.beginText();
    content.moveText(100, 500);
    content.showText(text);
    content.endText();
    
    Rectangle linkLocation = new Rectangle(95, 495 + baseFont.getDescentPoint(text, fontSize),
            105 + baseFont.getWidthPoint(text, fontSize), 505 + baseFont.getAscentPoint(text, fontSize));

    PdfAnnotation linkGreen = PdfAnnotation.createLink(writer, linkLocation, PdfName.HIGHLIGHT, "green" );
    PdfTemplate appearance = PdfTemplate.createTemplate(writer, linkLocation.getWidth(), linkLocation.getHeight());
    PdfGState state = new PdfGState();
    //state.FillOpacity = .3f;
    // IMPROVEMENT: Use blend mode Darken instead of transparency; you may also want to try Multiply.
    state.setBlendMode(new PdfName("Darken"));
    appearance.setGState(state);

    appearance.setColorFill(BaseColor.GREEN);
    appearance.rectangle(0, 0, linkLocation.getWidth(), linkLocation.getHeight());
    appearance.fill();
    linkGreen.setAppearance(PdfName.N, appearance);
    writer.addAnnotation(linkGreen);

    doc.open();
    doc.close();
}
 

import com.itextpdf.text.pdf.PdfContentByte; //导入方法依赖的package包/类
/**
 * @see com.itextpdf.text.pdf.PdfPageEventHelper#onEndPage(com.itextpdf.text.pdf.PdfWriter, com.itextpdf.text.Document)
 */
public void onEndPage(PdfWriter writer, Document document) {
    PdfContentByte cb = writer.getDirectContent();
    cb.saveState();
    // write the headertable
    table.setTotalWidth(document.right() - document.left());
    table.writeSelectedRows(0, -1, document.left(), document.getPageSize().getHeight() - 50, cb);
    // compose the footer
    String text = "Page " + writer.getPageNumber() + " of ";
    float textSize = helv.getWidthPoint(text, 12);
    float textBase = document.bottom() - 20;
    cb.beginText();
    cb.setFontAndSize(helv, 12);
    // for odd pagenumbers, show the footer at the left
    if ((writer.getPageNumber() & 1) == 1) {
        cb.setTextMatrix(document.left(), textBase);
        cb.showText(text);
        cb.endText();
        cb.addTemplate(tpl, document.left() + textSize, textBase);
    }
    // for even numbers, show the footer at the right
    else {
        float adjust = helv.getWidthPoint("0", 12);
        cb.setTextMatrix(document.right() - textSize - adjust, textBase);
        cb.showText(text);
        cb.endText();
        cb.addTemplate(tpl, document.right() - adjust, textBase);
    }
    cb.saveState();
    // draw a Rectangle around the page
    cb.setColorStroke(BaseColor.ORANGE);
    cb.setLineWidth(2);
    cb.rectangle(20, 20, document.getPageSize().getWidth() - 40, document.getPageSize().getHeight() - 40);
    cb.stroke();
    cb.restoreState();
    // starting on page 3, a watermark with an Image that is made transparent
    if (writer.getPageNumber() >= 3) {
        cb.setGState(gstate);
        cb.setColorFill(BaseColor.RED);
        cb.beginText();
        cb.setFontAndSize(helv, 48);
        cb.showTextAligned(Element.ALIGN_CENTER, "Watermark Opacity " + writer.getPageNumber(), document.getPageSize().getWidth() / 2, document.getPageSize().getHeight() / 2, 45);
        cb.endText();
        try {
            cb.addImage(headerImage, headerImage.getWidth(), 0, 0, headerImage.getHeight(), 440, 80);
        }
        catch(Exception e) {
            throw new ExceptionConverter(e);
        }
        cb.restoreState();
    }
    cb.sanityCheck();
}