http://xmlgraphics.apache.org/fop/: Apache FOP (Formatting Objects Processor) is the world's first print formatter driven by XSL formatting objects (XSL-FO) and the world's first output independent formatter. It is a Java application that reads a formatting object (FO) tree and renders the resulting pages to a specified output. Output formats currently supported include PDF, PCL, PS, AFP, TIFF, PNG, SVG, XML (area tree representation), Print, AWT and TXT. The primary output target is PDF. (Apache Software Foundation) 
/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

/* $Id: FopPrintServlet.java 1805173 2017-08-16 10:50:04Z ssteiner $ */

package org.apache.fop.servlet;

import java.io.IOException;
import java.io.PrintWriter;

import javax.servlet.http.HttpServletResponse;
import javax.xml.transform.Result;
import javax.xml.transform.Source;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerException;
import javax.xml.transform.sax.SAXResult;

import org.apache.fop.apps.FOPException;
import org.apache.fop.apps.FOUserAgent;
import org.apache.fop.apps.Fop;
import org.apache.fop.apps.MimeConstants;



Example servlet to generate a fop printout from a servlet.
Printing goes to the default printer on host where the servlet executes.
Servlet param is:

    
  
  • fo: the path to a XSL-FO file to render


or

    
  
  • xml: the path to an XML file to render
    • 
  
  • xslt: the path to an XSLT file that can transform the above XML to XSL-FO
    • 




Example URL: http://servername/fop/servlet/FopPrintServlet?fo=readme.fo


Example URL: http://servername/fop/servlet/FopPrintServlet?xml=data.xml


Note: This servlet is derived from FopServlet. Most methods are inherited from the
superclass. Only the differences to the base class are necessary.

/**
 * Example servlet to generate a fop printout from a servlet.
 * Printing goes to the default printer on host where the servlet executes.
 * Servlet param is:
 * <ul>
 *   <li>fo: the path to a XSL-FO file to render
 * </ul>
 * or
 * <ul>
 *   <li>xml: the path to an XML file to render</li>
 *   <li>xslt: the path to an XSLT file that can transform the above XML to XSL-FO</li>
 * </ul>
 * <br>
 * Example URL: http://servername/fop/servlet/FopPrintServlet?fo=readme.fo
 * <br>
 * Example URL: http://servername/fop/servlet/FopPrintServlet?xml=data.xml
 * <br>
 * <b>Note:</b> This servlet is derived from FopServlet. Most methods are inherited from the
 * superclass. Only the differences to the base class are necessary.
 */
public class FopPrintServlet extends FopServlet {

    private static final long serialVersionUID = 1645706757391617935L;

    
{@inheritDoc}

/**
     * {@inheritDoc}
     */
    protected void render(Source src, Transformer transformer, HttpServletResponse response)
            throws FOPException, TransformerException, IOException {

        FOUserAgent foUserAgent = getFOUserAgent();

        //Setup FOP
        Fop fop = fopFactory.newFop(MimeConstants.MIME_FOP_PRINT, foUserAgent);

        //Make sure the XSL transformation's result is piped through to FOP
        Result res = new SAXResult(fop.getDefaultHandler());

        //Start the transformation and rendering process
        transformer.transform(src, res);

        //Return the result
        reportOK(response);
    }

    // private helper, tell (browser) user that file printed
    private void reportOK(HttpServletResponse response) throws IOException {
        String sMsg = "<html><title>Success</title>\n"
                + "<body><h1>FopPrintServlet: </h1>"
                + "<h3>The requested data was printed to the default printer.</h3></body></html>";

        response.setContentType("text/html");
        response.setContentLength(sMsg.length());

        PrintWriter out = response.getWriter();
        out.println(sMsg);
        out.flush();
    }

}