Tutorials : Using FOP with Java - Part 2 :

However, the FOP distribution comes with a default implementation of these interfaces. The class is an inner class of the FOPPrintServlet example class. With the help of this class, you can handle any AWT based printing job pretty well. In out example, we will use the same class for handling the print job. Listing-1 presents a sample Java code for printing documents from FOP.

import java.awt.print.PrinterJob;

import java.io.ByteArrayInputStream;

import java.io.ByteArrayOutputStream;

import java.io.File;

import java.io.FileInputStream;

import java.io.FileOutputStream;

import java.io.IOException;

import javax.xml.transform.Source;

import javax.xml.transform.Transformer;

import javax.xml.transform.TransformerFactory;

import javax.xml.transform.stream.StreamResult;

import javax.xml.transform.stream.StreamSource;

import org.apache.fop.apps.Driver;

import org.jdom.Document;

import org.jdom.input.DOMBuilder;

import org.jdom.output.XMLOutputter;

import org.xml.sax.InputSource;

public class FOPPrint {

public void createFO(Document xmlFile, String xslFile) {

System.out.println("Producing FO document...");

Driver psDriver = new Driver();

FileOutputStream psOut = null;

try {

//1. get a FOP driver

Driver driver = new Driver();

String outputFile = "example-FO.fo";

FileOutputStream out = null;

out = new FileOutputStream(outputFile);

driver.setOutputStream(out);

//Setup XSLT

TransformerFactory factory = TransformerFactory.newInstance();

Transformer transformer = factory.newTransformer(new StreamSource(xslFile));

ByteArrayOutputStream outStream = new ByteArrayOutputStream();

new XMLOutputter().output(xmlFile, outStream);

outStream.close();

ByteArrayInputStream inStream = new ByteArrayInputStream(outStream.toByteArray());

//Setup input for XSLT transformation

Source src = new StreamSource(inStream);

//Start XSLT transformation and FOP processing

transformer.transform(src, new StreamResult(out));

} catch (Exception e) {

e.printStackTrace();

}

System.out.println("Finished Producing FO document...");

}

public void testPrintFO(String foFile) throws IOException {

FileOutputStream out = null;

try {

FileInputStream file = new FileInputStream(foFile);

InputSource source = new InputSource(file);

printFO(source);

} catch (Exception e) {

e.printStackTrace();

}

}

public void printFO(InputSource foFile) {

try {

Driver driver = new Driver(foFile, null);

PrinterJob pj = PrinterJob.getPrinterJob();

PrintRenderer renderer = new PrintRenderer(pj);

driver.setRenderer(renderer);

driver.run();

} catch (Exception ex) {

}

}

public static void main(String[] args) {

FOPPrint printer = new FOPPrint();

String xmlFile = "sample.xml";

String xslFile = "sample.xsl";

Document doc = null;

File file = null;

try {

System.out.println("Loading the file: " + xmlFile);

file = new File(xmlFile);

doc = new DOMBuilder().build(file);

System.out.println("The root element: " + doc.getRootElement().getName());

//printer.printActiveNominal(doc, xslFile);

printer.createFO(doc, xslFile);

printer.testPrintFO("nominal-FO.fo");

} catch (Exception e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

}

}

Listing 1, FO document and Print example

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