You might want to also review the Returning a File example.
(5-2-2013) JasperReports was added to Wonder last year. Kieran Kelleher has a wonderful (forgive the pun) presentation from 2010 Integrating and using JasperReports in your WebObjects App.
Zak Burke's Example
It is important to add "-Djava.awt.headless=true" to the "Additional Arguments" list to suppress a console window running WOBootstrap that will try to pop up and then fail to close, which seems to prevent the thread from returning, which causes the app to hang.
private ByteArrayOutputStream pdf()
// binary container for PDF
ByteArrayOutputStream out = null;
// assume these exist
String xsl, xml;
TransformerFactory transformerFactory = TransformerFactory.newInstance();
// configure FOP, apache's XML->PDF transformer
Fop fop = new Fop(MimeConstants.MIME_PDF);
out = new ByteArrayOutputStream();
// configure XSLT transformer
Source xsltSrc = new StreamSource(new StringReader(xsl));
Transformer transformer = transformerFactory.newTransformer(xsltSrc);
// pipe XSL transformation through to FOP
Result res = new SAXResult(fop.getDefaultHandler());
// grab XML input stream
Source src = new StreamSource(new StringReader(xml));
// Start the transformation and rendering process
catch (Exception e)
// actually, catch the following, one by one:
public void appendToResponse(WOResponse response, WOContext context)
ByteArrayOutputStream out = pdf();
// without data, show the PDF page, which is just an error message.
if (out == null)
// assume this exists
response.setHeader("" + out.size() + "", "Content-Length");
response.setHeader("attachment;filename=" + filename, "Content-Disposition");