If you are writing the PDF to the outputstream your struts action can
(should) return null.
On 12/15/05 11:28 AM, "Diana K. Woodhouse" <[EMAIL PROTECTED]> wrote:
> Nevermind this null pointer exception. I made the Pdf
> class extend Action and added this method.
>
> public ActionForward execute(
> ActionMapping mapping,
> ActionForm form,
> HttpServletRequest request,
> HttpServletResponse response ) throws
> IOException, ServletException {
>
> HttpSession httpsession = request.getSession(true);
> try {
> ...
>
> NEW PROBLEM with this: The action needs to return
> something. How can the action return the Pdf in the
> Outputstream?????
>
>
>
> --- "Diana K. Woodhouse" <[EMAIL PROTECTED]> wrote:
>
>> Thanks everybody for your replies! I've changed the
>> method createPdf() below to stream to an output
>> buffer
>> like in the tutorial example. I'm getting a null
>> pointer exception in the close method.
>>
>> // NEW
>> private ByteArrayOutputStream baos;
>> private ServletOutputStream out;
>> private ServletResponse response;
>>
>> public Pdf(String filename) {
>>
>> try {
>>
>> // we create a reader for a certain document
>> infilename = path + "form.pdf";
>>
>>
>> // we create a reader for a certain document
>> reader = new PdfReader(infilename);
>>
>>
>> // we retrieve the size of the first page
>> pager = reader.getPageSize(1);
>>
>> // step 1: creation of a document-object
>> document = new Document(pager, 50, 50, 50, 50);
>>
>> // NEW
>> baos = new ByteArrayOutputStream();
>>
>> // step 2: we create a writer that listens to
>> // the document
>>
>> // OLD
>> //writer = PdfWriter.getInstance(document,
>> new
>> FileOutputStream(outfilename));
>>
>> // NEW
>> writer = PdfWriter.getInstance(document, baos);
>>
>> // step 3: we open the document
>> document.open();
>>
>> // step 4: we add content
>> cb = writer.getDirectContent();
>> document.newPage();
>> pagew = writer.getImportedPage(reader, 1);
>> cb.addTemplate(pagew, 0, 0);
>> // we tell the ContentByte we're ready to draw text
>> cb.beginText();
>>
>> bf = BaseFont.createFont(BaseFont.HELVETICA,
>> BaseFont.CP1252, BaseFont.NOT_EMBEDDED);
>> cb.setFontAndSize(bf, 10);
>>
>>
>> pdf.setConfnumber(record.getConfnumber());
>> cb.endText();
>> } catch (Exception e) {}
>> }
>>
>> public void close() {
>> // step 5: we close the document
>> document.close();
>>
>> try {
>>
>> // NEW
>>
>> response.setContentType("application/pdf");
>> response.setContentLength(baos.size());
>> out = response.getOutputStream();
>> baos.writeTo(out);
>> out.flush();
>> } catch (Exception e) {
>> log.error("Function pdf.close failed: " +
>> e);
>>
>> }
>> }
>>
>>
>> Error message is:
>>
>> Function pdf.close failed:
>> java.lang.NullPointerException
>>
>>
>>
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