public  void convertXML2FO(File xml,
    File xslt,
    File fo) throws TransformerException, IOException 
{
       
        //Setup output
        OutputStream out = new java.io.FileOutputStream(fo);
        try {
            //Setup XSLT
            TransformerFactory factory = TransformerFactory.newInstance();
            Transformer transformer = factory.newTransformer(new StreamSource(xslt));
            //Setup input for XSLT transformation
            Source src = new StreamSource(xml);
            //Resulting SAX events (the generated FO) must be piped through to FOP
            Result res = new StreamResult(out);
            //Start XSLT transformation and FOP processing
            transformer.transform(src, res);
        } finally {
            out.close();
        }
}

Converts an XML file to an XSL-FO file using JAXP (XSLT).

 public static  void main(String[] args) 
{
        try {
            System.out.println("FOP ExampleXML2FO\n");
            System.out.println("Preparing...");
            //Setup directories
            File baseDir = new File(".");
            File outDir = new File(baseDir, "out");
            outDir.mkdirs();
            //Setup input and output files            
            File xmlfile = new File(baseDir, "xml/xml/projectteam.xml");
            File xsltfile = new File(baseDir, "xml/xslt/projectteam2fo.xsl");
            File fofile = new File(outDir, "ResultXML2FO.fo");
            System.out.println("Input: XML (" + xmlfile + ")");
            System.out.println("Stylesheet: " + xsltfile);
            System.out.println("Output: XSL-FO (" + fofile + ")");
            System.out.println();
            System.out.println("Transforming...");
            ExampleXML2FO app = new ExampleXML2FO();
            app.convertXML2FO(xmlfile, xsltfile, fofile);
            System.out.println("Success!");
        } catch (Exception e) {
            e.printStackTrace(System.err);
            System.exit(-1);
        }
}

Main method.