Java Code Examples for com.lowagie.text.pdf.PdfContentByte#showTextAligned()

/**
   * Print footer string on each page
   * @param writer
   * @param document
   */
  public void onEndPage(PdfWriter writer, Document document) {
   
  	if(getDateTime() == null) {
  		setDateTime(new Date());
  	}
  	
PdfContentByte cb = writer.getDirectContent();
cb.beginText();
cb.setFontAndSize(getBaseFont(), getFontSize());
cb.showTextAligned(PdfContentByte.ALIGN_LEFT, getDateFormat().format(getDateTime()), 
	    document.left(), 20, 0);
cb.showTextAligned(PdfContentByte.ALIGN_RIGHT, String.valueOf(document.getPageNumber()), 
	    document.right(), 20, 0);
cb.showTextAligned(PdfContentByte.ALIGN_CENTER, MESSAGES.pdfCopyright(Constants.getVersion()),
		(document.left() + document.right()) / 2, 20, 0);
cb.endText();
	
      return;
  }
 

/**
 * @see com.lowagie.text.pdf.PdfPageEventHelper#onStartPage(com.lowagie.text.pdf.PdfWriter, com.lowagie.text.Document)
 */
public void onStartPage(PdfWriter writer, Document document) {
    if (writer.getPageNumber() < 3) {
        PdfContentByte cb = writer.getDirectContentUnder();
        cb.saveState();
        cb.setColorFill(Color.pink);
        cb.beginText();
        cb.setFontAndSize(helv, 48);
        cb.showTextAligned(Element.ALIGN_CENTER, "My Watermark Under " + writer.getPageNumber(), document.getPageSize().getWidth() / 2, document.getPageSize().getHeight() / 2, 45);
        cb.endText();
        cb.restoreState();
    }
}
 

public static void addWatermark(PdfStamper pdfStamper, BaseFont baseFont, Color fontColor, String waterMarkString) throws Exception {
	if (null == pdfStamper || null == baseFont) {
		throw new java.lang.Exception("PdfStamper or BaseFont is null.");
	}
	if (StringUtils.isBlank(waterMarkString)) {
		return;
	}
	PdfContentByte pdfContentByte = null;
	Rectangle pageRect = null;
	PdfGState pdfGState = new PdfGState();
	// 设置透明度为0.4
	pdfGState.setFillOpacity(0.4f);
	pdfGState.setStrokeOpacity(0.4f);
       int pageNum = pdfStamper.getReader().getNumberOfPages();
       try {
           for (int i = 1; i <= pageNum; i++) {
           	pageRect = pdfStamper.getReader().getPageSizeWithRotation(i);
           	// 计算水印X,Y坐标
           	float x = pageRect.getWidth() / 2;
           	float y = pageRect.getHeight() / 2;
           	//获得PDF最顶层
           	pdfContentByte = pdfStamper.getOverContent(i);
           	pdfContentByte.saveState();
           	// set Transparency
           	pdfContentByte.setGState(pdfGState);
           	pdfContentByte.beginText();
           	pdfContentByte.setColorFill(fontColor);
           	pdfContentByte.setFontAndSize(baseFont, 60);
           	// 水印文字成45度角倾斜
           	pdfContentByte.showTextAligned(Element.ALIGN_CENTER, waterMarkString, x, y, 45);
           	pdfContentByte.endText();             	
           }
       } catch (Exception e) {
       	e.printStackTrace();
       } finally {
       	pdfContentByte = null;
           pageRect = null;        	
       }
}
 

/**
    * Reads the pages of an existing PDF file, adds pagenumbers and a watermark.

    */
@Test
   public  void main() throws Exception {
           // we create a reader for a certain document
           PdfReader reader = new PdfReader(PdfTestBase.RESOURCES_DIR +"ChapterSection.pdf");
           int n = reader.getNumberOfPages();
           // we create a stamper that will copy the document to a new file
           PdfStamper stamp = new PdfStamper(reader,PdfTestBase.getOutputStream("watermark_pagenumbers.pdf"));
           // adding some metadata
           HashMap<String, String> moreInfo = new HashMap<String, String>();
           moreInfo.put("Author", "Bruno Lowagie");
           stamp.setMoreInfo(moreInfo);
           // adding content to each page
           int i = 0;
           PdfContentByte under;
           PdfContentByte over;
           Image img = Image.getInstance(PdfTestBase.RESOURCES_DIR +"watermark.jpg");
           BaseFont bf = BaseFont.createFont(BaseFont.HELVETICA, BaseFont.WINANSI, BaseFont.EMBEDDED);
           img.setAbsolutePosition(200, 400);
           while (i < n) {
           	i++;
           	// watermark under the existing page
           	under = stamp.getUnderContent(i);
           	under.addImage(img);
           	// text over the existing page
           	over = stamp.getOverContent(i);
           	over.beginText();
           	over.setFontAndSize(bf, 18);
           	over.setTextMatrix(30, 30);
           	over.showText("page " + i);
           	over.setFontAndSize(bf, 32);
           	over.showTextAligned(Element.ALIGN_LEFT, "DUPLICATE", 230, 430, 45);
           	over.endText();
           }
           // adding an extra page
           stamp.insertPage(1, PageSize.A4);
           over = stamp.getOverContent(1);
       	over.beginText();
       	over.setFontAndSize(bf, 18);
           over.showTextAligned(Element.ALIGN_LEFT, "DUPLICATE OF AN EXISTING PDF DOCUMENT", 30, 600, 0);
           over.endText();
           // adding a page from another document
           PdfReader reader2 = new PdfReader(PdfTestBase.RESOURCES_DIR +"SimpleAnnotations1.pdf");
           under = stamp.getUnderContent(1);
           under.addTemplate(stamp.getImportedPage(reader2, 3), 1, 0, 0, 1, 0, 0);
           // closing PdfStamper will generate the new PDF file
           stamp.close();
   }
 

/**
 * Reads the pages of an existing PDF file and puts 2 pages from the
 * existing doc into one of the new doc.
 */
@Test
public void main() throws Exception {
	// we create a reader for a certain document
	PdfReader reader = new PdfReader(PdfTestBase.RESOURCES_DIR + "ChapterSection.pdf");
	// we retrieve the total number of pages
	int n = reader.getNumberOfPages();
	// we retrieve the size of the first page
	Rectangle psize = reader.getPageSize(1);
	float width = psize.getHeight();
	float height = psize.getWidth();

	// step 1: creation of a document-object
	Document document = new Document(new Rectangle(width, height));
	// step 2: we create a writer that listens to the document
	PdfWriter writer = PdfWriter.getInstance(document, PdfTestBase.getOutputStream("2on1.pdf"));
	// step 3: we open the document
	document.open();
	// step 4: we add content
	PdfContentByte cb = writer.getDirectContent();
	int i = 0;
	int p = 0;
	while (i < n) {
		document.newPage();
		p++;
		i++;
		PdfImportedPage page1 = writer.getImportedPage(reader, i);
		cb.addTemplate(page1, .5f, 0, 0, .5f, 60, 120);
		if (i < n) {
			i++;
			PdfImportedPage page2 = writer.getImportedPage(reader, i);
			cb.addTemplate(page2, .5f, 0, 0, .5f, width / 2 + 60, 120);
		}
		BaseFont bf = BaseFont.createFont(BaseFont.HELVETICA, BaseFont.CP1252, BaseFont.NOT_EMBEDDED);
		cb.beginText();
		cb.setFontAndSize(bf, 14);
		cb.showTextAligned(PdfContentByte.ALIGN_CENTER, "page " + p + " of " + ((n / 2) + (n % 2 > 0 ? 1 : 0)),
				width / 2, 40, 0);
		cb.endText();
	}
	// step 5: we close the document
	document.close();

}
 

/**
    * Creates a PDF document with shapes, lines and text at specific X and Y coordinates.
    */
@Test
public void main() throws Exception {
       
       // step 1: creation of a document-object
       Document document = new Document();
       
       try {      
           // step 2: creation of the writer
           PdfWriter writer = PdfWriter.getInstance(document, PdfTestBase.getOutputStream( "XandY.pdf"));
           
           // step 3: we open the document
           document.open();
           
           // step 4:
           PdfContentByte cb = writer.getDirectContent();
           
           // we create a PdfTemplate
           PdfTemplate template = cb.createTemplate(25, 25);
           
           // we add some crosses to visualize the coordinates
           template.moveTo(13, 0);
           template.lineTo(13, 25);
           template.moveTo(0, 13);
           template.lineTo(50, 13);
           template.stroke();
           template.sanityCheck();
           
           // we add the template on different positions
           cb.addTemplate(template, 216 - 13, 720 - 13);
           cb.addTemplate(template, 360 - 13, 360 - 13);
           cb.addTemplate(template, 360 - 13, 504 - 13);
           cb.addTemplate(template, 72 - 13, 144 - 13);
           cb.addTemplate(template, 144 - 13, 288 - 13);

           cb.moveTo(216, 720);
           cb.lineTo(360, 360);
           cb.lineTo(360, 504);
           cb.lineTo(72, 144);
           cb.lineTo(144, 288);
           cb.stroke();
           
           BaseFont bf = BaseFont.createFont(BaseFont.HELVETICA, BaseFont.CP1252, BaseFont.NOT_EMBEDDED);
           cb.beginText();
           cb.setFontAndSize(bf, 12);
           cb.showTextAligned(PdfContentByte.ALIGN_CENTER, "(3\", 10\")", 216 + 25, 720 + 5, 0);
           cb.showTextAligned(PdfContentByte.ALIGN_CENTER, "(5\", 5\")", 360 + 25, 360 + 5, 0);
           cb.showTextAligned(PdfContentByte.ALIGN_CENTER, "(5\", 7\")", 360 + 25, 504 + 5, 0);
           cb.showTextAligned(PdfContentByte.ALIGN_CENTER, "(1\", 2\")", 72 + 25, 144 + 5, 0);
           cb.showTextAligned(PdfContentByte.ALIGN_CENTER, "(2\", 4\")", 144 + 25, 288 + 5, 0);
           cb.endText(); 
           
           cb.sanityCheck();
       }
       catch(DocumentException de) {
           System.err.println(de.getMessage());
       }
       catch(IOException ioe) {
           System.err.println(ioe.getMessage());
       }
       
       // step 5: we close the document
       document.close();
   }
 

/**
    * Changes the default coordinate system so that the origin is in the upper left corner
    * instead of the lower left corner.
    */
@Test
public void main() throws Exception {
       
       // step 1: creation of a document-object
       Document document = new Document(PageSize.A4);
       
       try {
           // step 2: creation of the writer
           PdfWriter writer = PdfWriter.getInstance(document, PdfTestBase.getOutputStream( "upsidedown.pdf"));
           
           // step 3: we open the document
           document.open();
           
           // step 4:
           PdfContentByte cb = writer.getDirectContent();
           cb.concatCTM(1f, 0f, 0f, -1f, 0f, PageSize.A4.getHeight());
           
           // we create a PdfTemplate
           PdfTemplate template = cb.createTemplate(25, 25);
           
           // we add some crosses to visualize the coordinates
           template.moveTo(13, 0);
           template.lineTo(13, 25);
           template.moveTo(0, 13);
           template.lineTo(50, 13);
           template.stroke();
           template.sanityCheck();
           
           // we add the template on different positions
           cb.addTemplate(template, 216 - 13, 720 - 13);
           cb.addTemplate(template, 360 - 13, 360 - 13);
           cb.addTemplate(template, 360 - 13, 504 - 13);
           cb.addTemplate(template, 72 - 13, 144 - 13);
           cb.addTemplate(template, 144 - 13, 288 - 13);

           cb.moveTo(216, 720);
           cb.lineTo(360, 360);
           cb.lineTo(360, 504);
           cb.lineTo(72, 144);
           cb.lineTo(144, 288);
           cb.stroke();
           
           BaseFont bf = BaseFont.createFont(BaseFont.HELVETICA, BaseFont.CP1252, BaseFont.NOT_EMBEDDED);
           cb.beginText();
           cb.setFontAndSize(bf, 12);
           cb.showTextAligned(PdfContentByte.ALIGN_CENTER, "(3\", 10\")", 216 + 25, 720 + 5, 0);
           cb.showTextAligned(PdfContentByte.ALIGN_CENTER, "(5\", 5\")", 360 + 25, 360 + 5, 0);
           cb.showTextAligned(PdfContentByte.ALIGN_CENTER, "(5\", 7\")", 360 + 25, 504 + 5, 0);
           cb.showTextAligned(PdfContentByte.ALIGN_CENTER, "(1\", 2\")", 72 + 25, 144 + 5, 0);
           cb.showTextAligned(PdfContentByte.ALIGN_CENTER, "(2\", 4\")", 144 + 25, 288 + 5, 0);
           cb.endText();
           
           cb.sanityCheck();
       }
       catch(DocumentException de) {
           System.err.println(de.getMessage());
       }
       catch(IOException ioe) {
           System.err.println(ioe.getMessage());
       }
       
       // step 5: we close the document
       document.close();
   }
 

/**
 * Changes the transformation matrix with AffineTransform.
 */
@Test
public void main() throws Exception {

	// step 1: creation of a document-object
	Document document = new Document(PageSize.A4);

	// step 2: creation of the writer
	PdfWriter writer = PdfWriter.getInstance(document,
			PdfTestBase.getOutputStream("affinetransformation.pdf"));

	// step 3: we open the document
	document.open();

	// step 4:
	PdfContentByte cb = writer.getDirectContent();
	cb.transform(AffineTransform.getScaleInstance(1.2, 0.75));

	// we create a PdfTemplate
	PdfTemplate template = cb.createTemplate(25, 25);

	// we add some crosses to visualize the coordinates
	template.moveTo(13, 0);
	template.lineTo(13, 25);
	template.moveTo(0, 13);
	template.lineTo(50, 13);
	template.stroke();
	template.sanityCheck();

	// we add the template on different positions
	cb.addTemplate(template, 216 - 13, 720 - 13);
	cb.addTemplate(template, 360 - 13, 360 - 13);
	cb.addTemplate(template, 360 - 13, 504 - 13);
	cb.addTemplate(template, 72 - 13, 144 - 13);
	cb.addTemplate(template, 144 - 13, 288 - 13);

	cb.moveTo(216, 720);
	cb.lineTo(360, 360);
	cb.lineTo(360, 504);
	cb.lineTo(72, 144);
	cb.lineTo(144, 288);
	cb.stroke();

	BaseFont bf = BaseFont.createFont(BaseFont.HELVETICA, BaseFont.CP1252,
			BaseFont.NOT_EMBEDDED);
	cb.beginText();
	cb.setFontAndSize(bf, 12);
	cb.showTextAligned(PdfContentByte.ALIGN_CENTER,
			"(3\" * 1.2, 10\" * .75)", 216 + 25, 720 + 5, 0);
	cb.showTextAligned(PdfContentByte.ALIGN_CENTER,
			"(5\" * 1.2, 5\" * .75)", 360 + 25, 360 + 5, 0);
	cb.showTextAligned(PdfContentByte.ALIGN_CENTER,
			"(5\" * 1.2, 7\" * .75)", 360 + 25, 504 + 5, 0);
	cb.showTextAligned(PdfContentByte.ALIGN_CENTER,
			"(1\" * 1.2, 2\" * .75)", 72 + 25, 144 + 5, 0);
	cb.showTextAligned(PdfContentByte.ALIGN_CENTER,
			"(2\" * 1.2, 4\" * .75)", 144 + 25, 288 + 5, 0);
	cb.endText();

	cb.sanityCheck();

	// step 5: we close the document
	document.close();
}
 

/**
 * Adding text at absolute positions.
 */
@Test
public void main() throws Exception {

	// step 1: creation of a document-object
	Document document = new Document();

	// step 2: creation of the writer
	PdfWriter writer = PdfWriter.getInstance(document,
			PdfTestBase.getOutputStream("text.pdf"));

	// step 3: we open the document
	document.open();

	// step 4: we grab the ContentByte and do some stuff with it
	PdfContentByte cb = writer.getDirectContent();

	// first we draw some lines to be able to visualize the text alignment
	// functions
	cb.setLineWidth(0f);
	cb.moveTo(250, 500);
	cb.lineTo(250, 800);
	cb.moveTo(50, 700);
	cb.lineTo(400, 700);
	cb.moveTo(50, 650);
	cb.lineTo(400, 650);
	cb.moveTo(50, 600);
	cb.lineTo(400, 600);
	cb.stroke();

	// we tell the ContentByte we're ready to draw text
	cb.beginText();

	BaseFont bf = BaseFont.createFont(BaseFont.HELVETICA, BaseFont.CP1252,
			BaseFont.NOT_EMBEDDED);
	cb.setFontAndSize(bf, 12);
	String text = "Sample text for alignment";
	// we show some text starting on some absolute position with a given
	// alignment
	cb.showTextAligned(PdfContentByte.ALIGN_CENTER, text + " Center", 250,
			700, 0);
	cb.showTextAligned(PdfContentByte.ALIGN_RIGHT, text + " Right", 250,
			650, 0);
	cb.showTextAligned(PdfContentByte.ALIGN_LEFT, text + " Left", 250, 600,
			0);

	// we draw some text on a certain position
	cb.setTextMatrix(100, 400);
	cb.showText("Text at position 100,400.");

	// we draw some rotated text on a certain position
	cb.setTextMatrix(0, 1, -1, 0, 100, 300);
	cb.showText("Text at position 100,300, rotated 90 degrees.");

	// we draw some mirrored, rotated text on a certain position
	cb.setTextMatrix(0, 1, 1, 0, 200, 200);
	cb.showText("Text at position 200,200, mirrored and rotated 90 degrees.");

	// we tell the contentByte, we've finished drawing text
	cb.endText();

	cb.sanityCheck();

	// step 5: we close the document
	document.close();
}
 

/**
 * @see com.lowagie.text.pdf.PdfPageEventHelper#onEndPage(com.lowagie.text.pdf.PdfWriter, com.lowagie.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);
    }

    // draw a Rectangle around the page
    cb.setColorStroke(Color.orange);
    cb.setLineWidth(2);
    cb.rectangle(20, 20, document.getPageSize().getWidth() - 40, document.getPageSize().getHeight() - 40);
    cb.stroke();

    // starting on page 3, a watermark with an Image that is made transparent
    if (writer.getPageNumber() >= 3) {

        cb.setGState(gstate);
        cb.setColorFill(Color.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();
}
 

/**
 * Method that generates the actual PDF file.
 */
public void generatePdf() throws Exception {

	// step 1: creation of a document-object
	Rectangle pageSize = new Rectangle(780, 525);
	if (backgroundcolor != null) {
		pageSize.setBackgroundColor(backgroundcolor);
	}
	Document document = new Document(pageSize);

	// step 2:
	// we create a writer that listens to the document
	// and directs a PDF-stream to a file
	if (filename == null) {
		filename = PdfTestBase.OUTPUT_DIR + "dvdcover.pdf";
	}
	PdfWriter writer = PdfWriter.getInstance(document, new FileOutputStream(filename));

	// step 3: we open the document
	document.open();

	// step 4:
	PdfContentByte cb = writer.getDirectContent();
	if (title != null) {
		cb.setFontAndSize(BaseFont.createFont(BaseFont.HELVETICA, BaseFont.WINANSI, false), 24);
		cb.beginText();
		if (front == null) {
			cb.showTextAligned(Element.ALIGN_CENTER, title, 595f, 262f, 0f);
		}
		if (side == null) {
			cb.showTextAligned(Element.ALIGN_CENTER, title, 385f, 262f, 270f);
		}
		cb.endText();
	}
	cb.moveTo(370, 0);
	cb.lineTo(370, 525);
	cb.moveTo(410, 525);
	cb.lineTo(410, 0);
	cb.stroke();
	if (front != null) {
		front.scaleToFit(370, 525);
		front.setAbsolutePosition(410f + (370f - front.getScaledWidth()) / 2f,
				(525f - front.getScaledHeight()) / 2f);
		document.add(front);
	}
	if (back != null) {
		back.scaleToFit(370, 525);
		back.setAbsolutePosition((370f - back.getScaledWidth()) / 2f, (525f - back.getScaledHeight()) / 2f);
		document.add(back);
	}
	if (side != null) {
		side.scaleToFit(40, 525);
		side.setAbsolutePosition(370 + (40f - side.getScaledWidth()) / 2f, (525f - side.getScaledHeight()) / 2f);
		document.add(side);
	}

	// step 5: we close the document
	document.close();
}