Trouble in generating pdf reports with Jasper and iText

[Leticia Barbalho]

Hey everyone,

I have a report created on iReports, and I wanna present it on my browser in my web app. The problem is I need to add a barcode in a specific point of this report. This barcode is being generated correctly, using class BarcodeInter25 of iText.

The problem happens when I'm gonna insert this barcode in the existing report in runtime. I tried it two ways:

First way:

         ServletOutputStream out = response.getOutputStream();
         Document document = new Document();
         
         ByteArrayOutputStream baos = new ByteArrayOutputStream();
         
         try {
             
             PdfWriter writer = PdfWriter.getInstance(document, baos);
             
             document.open();
             
             PdfReader reader = new PdfReader("/caminho/meurelatorio.pdf");
             PdfImportedPage page1 = writer.getImportedPage(reader, 1);
             writer.getDirectContent().addTemplate(page1, 1, 0, 0, 1, 0, 0);            
             
             PdfContentByte cb = writer.getDirectContent();
             BarcodeInter25 codeI25 = new BarcodeInter25();
             codeI25.setCode("00190000090050201018400016324188");
             Image imageI25 = codeI25.createImageWithBarcode(cb, null, null);
 
             //ao criar o Chunk, os parametros correspondem a imagem, posicao horizontal,
             //posicao vertical
             document.add(new Phrase(new Chunk(imageI25, 10, -600)));            
             
             document.close();
             } catch (Exception e) {
             e.printStackTrace();
         }
         
         response.setContentType("application/pdf");
         response.setContentLength(baos.size());
         baos.writeTo(out);
         out.flush();

In this first attempt, I use PdfImportedPage to import the page from my existing pdf and put it in my new report. But it it not working: the report shows only with the barcode, it hasn't imported the file I pointed.

Second way:

         ServletOutputStream out = response.getOutputStream();
         Document document = new Document();
         
         ByteArrayOutputStream baos = new ByteArrayOutputStream();
         
         try {
 
             PdfWriter writer = PdfWriter.getInstance(document, new FileOutputStream("/caminho/meurelatorio.pdf"));
             
             document.open();
 
             PdfContentByte cb = writer.getDirectContent();
             BarcodeInter25 codeI25 = new BarcodeInter25();
             codeI25.setCode("00190000090050201018400016324188");
             Image imageI25 = codeI25.createImageWithBarcode(cb, null, null);
             //ao criar o Chunk, os parametros correspondem a imagem, posicao horizontal,
             //posicao vertical
             document.add(new Phrase(new Chunk(imageI25, 10, -600)));            
             
             document.close();
             } catch (Exception e) {
             e.printStackTrace();
         }
         
         response.setContentType("application/pdf");
         response.setContentLength(baos.size());
         baos.writeTo(out);
         out.flush();

In this second attempt, I try to open the pdf directly in my document and write the image on it with pdfwriter. The code is normally interpreted and it gives me no error, but when it tries to open the pdf of the screen, it doesn't open. The screen remains gray, like if it was forever loading.

The documentation I'm using comes mainly from here:
http://itextdocs.lowagie.com/tutorial/general/copystamp/.

I accept any kind of help on ways to do it

Thanks in advance

[David O'Meara]

This is not a Servlet specific question so I'm moving it to Other Java APIs.

Try writing the code in a stand-alone class first and write it to the file system. Once you are able to read this you should be able to alter it to stream to the client.

Dave

[Jason Moors]

You need to use the PdfStamper class instead of PdfWriter.

You need to do something like :

    
 
// create a reader for a certain document
PdfReader reader = new PdfReader("/caminho/meurelatorio.pdf");
 
// create a stamper that will copy the document to a new file
PdfStamper stamp = new PdfStamper(reader, baos);
 
// Get the ContentByte for the Page that you want to add image
PdfContentByte underContent = stamp.getUnderContent(pageIndex);
 
BarcodeInter25 codeI25 = new BarcodeInter25();             
codeI25.setCode("00190000090050201018400016324188");             
Image imageI25 = codeI25.createImageWithBarcode(cb, null, null);
 
// Set Position of Bar Code
imageI25.setAbsolutePosition(200, 400);
 
Add Image to page
underContent.addImage(imageI25);
 

[ March 31, 2006: Message edited by: Jason Moors ]
[ March 31, 2006: Message edited by: Jason Moors ]