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PDFBox: Overlaying one PDF on another

/ Published in: Java
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Generates two PDF documents and then overlays the second onto the first.

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  1. /**
  2.  * @param args the command line arguments
  3.  * @throws java.io.IOException
  4.  */
  5. public static void main(String[] args) throws IOException {
  6.     PDDocument document1 = getFirstDoc();
  7.     PDDocument document2 = getSecondDoc();
  8.  
  9.     Overlay overlay = new Overlay();
  10.     overlay.setOverlayPosition(Overlay.Position.FOREGROUND);
  11.     overlay.setInputPDF(document1);
  12.     overlay.setAllPagesOverlayPDF(document2);
  13.  
  14.     Map<Integer, String> ovmap = new HashMap<Integer, String>();            
  15.     overlay.overlay(ovmap);
  16.  
  17.     document1.save("");
  18.  
  19.     document1.close();
  20.     document2.close();
  21. }
  22.  
  23. static PDDocument getFirstDoc() throws IOException {
  24.     PDDocument document = new PDDocument();
  25.     PDPage page = new PDPage(PDRectangle.A4);
  26.  
  27.     document.addPage(page);
  28.  
  29.     PDPageContentStream contentStream = new PDPageContentStream(document, page);
  30.  
  31.     contentStream.setNonStrokingColor(Color.RED);
  32.     contentStream.addRect(0, 0, page.getMediaBox().getWidth(), page.getMediaBox().getHeight());
  33.     contentStream.fill();
  34.  
  35.     contentStream.close();
  36.  
  37.     return document;
  38. }
  39.  
  40. static PDDocument getSecondDoc() throws IOException {
  41.     PDDocument document = new PDDocument();
  42.     PDPage page = new PDPage(PDRectangle.A4);
  43.  
  44.     document.addPage(page);
  45.  
  46.     PDPageContentStream contentStream = new PDPageContentStream(document, page);
  47.  
  48.     contentStream.beginText(); 
  49.  
  50.     contentStream.setFont(PDType1Font.TIMES_ROMAN, 12);
  51.     contentStream.newLineAtOffset(25, 500);
  52.     contentStream.showText("Hello World");
  53.  
  54.     contentStream.endText();
  55.  
  56.     contentStream.close();
  57.  
  58.     return document;
  59. }

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