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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