How insert page footer in pdf when copy the pdf

[changping shui]

   
    public static int copyLocalFiles(String filepath, String savepath) {
        int n = 0;
        try {
            PdfReader reader = new PdfReader(filepath);

            n = reader.getNumberOfPages();
            Document document = new Document(reader.getPageSize(1));

            // headers and footers must be added before the document is opened

            PdfCopy copy = new PdfCopy(document, new FileOutputStream(savepath));
            BaseFont bf_courier = BaseFont.createFont(BaseFont.COURIER, "Cp1252", false);
            HeaderFooter footer = new HeaderFooter(new Phrase("This is page: ", new Font(bf_courier)), true);
            footer.setBorder(Rectangle.NO_BORDER);
            footer.setAlignment(Element.ALIGN_CENTER);
            document.setFooter(footer);
            document.open();

            for (int i = 1; i <= n; i++) {
                document.newPage();
                PdfImportedPage page = copy.getImportedPage(reader, i);
                copy.addPage(page);
            }

            document.close();

        } catch (IOException e) {
            e.printStackTrace();
        } catch (DocumentException e) {
            e.printStackTrace();
        }
        return n;
    }

 

[Ulf Dittmer]

Which API is this that you're using? What does the code do now, and what's still missing?

[changping shui]

now. I'm using the iText 2.1.7

  

  document.newPage();  
  PdfImportedPage page = copy.getImportedPage(reader, i);  
  // for the original pdf contains 3 page, but it doesnt include the header and footer
  // can I modify the page here?
  // becaz I want to add the header and footer to every page.
  // 
  // could I do that here, to change the page content or append the footer and header
  copy.addPage(page);  
 

[changping shui]

    
            for (int i = 1; i <= n; i++) {
                document.newPage();

                PdfImportedPage page = copy.getImportedPage(reader, i);
                
                PdfDictionary pdfDictionary = reader.getPageN(i);
                PRIndirectReference objectReference = (PRIndirectReference) pdfDictionary.get(PdfName.CONTENTS);
                PRStream stream = (PRStream) PdfReader.getPdfObject(objectReference);
                byte[] streamBytes = PdfReader.getStreamBytes(stream);
                String contentStream = new String(streamBytes);
                
                StringBuffer buf2 = new StringBuffer();
                int footerPos = contentStream.indexOf(FOOTER_PAGE) + 7;
                buf2.append(contentStream.substring(0, footerPos));
                buf2.append(i + "/" + n);
                buf2.append(contentStream.substring(footerPos));
                String hackedContentStream = buf2.toString();
                PdfContentByte cb = page.getPdfWriter().getDirectContent();
                cb.setLiteral(hackedContentStream);
                page.add(cb);
                
                copy.addPage(page);
            }

I try to add the footer as the first post, but there is no affection.

and I look at the example in iText in Action.
There is in_action.chapter18.HelloWorldStream class
so I follow it, and modify the code like above, it also no affection

[Ulf Dittmer]

I don't think you can use HeaderFooter when altering an existing document - you need to work with lower-level classes. I also think that PdfStamper is a better choice than PdfCopy.

Here's an example that adds text to an existing document: http://1t3xt.info/examples/browse/?page=example&id=24 (that would be in the "getOverContent" part). Instead of setTextMatrix and showText you may want to use "over.showTextAligned(PdfContentByte.ALIGN_RIGHT, text, x, y, 0)" with suitable values for x and y (which will depend on the page size).