Create an indention to pretty print the XML. - Java XML

Java examples for XML:XML Transform

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Description

Create an indention to pretty print the XML.

Demo Code

/**/*  w ww  . java2 s.c  o  m*/
 * EsPReSSO - Extension for Processing and Recognition of Single Sign-On Protocols.
 * Copyright (C) 2015 Tim Guenther and Christian Mainka
 *
 * This program is free software; you can redistribute it and/or modify it under
 * the terms of the GNU General Public License as published by the Free Software
 * Foundation; either version 2 of the License, or (at your option) any later
 * version.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
 * details.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program; if not, write to the Free Software Foundation, Inc., 51
 * Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 */
import java.io.StringReader;
import java.io.StringWriter;
import javax.xml.transform.OutputKeys;
import javax.xml.transform.Source;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerException;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.stream.*;

public class Main{
    public static void main(String[] argv) throws Exception{
        String input = "java2s.com";
        int indent = 2;
        System.out.println(format(input,indent));
    }
    /**
     * Create an indention to pretty print the XML.
     * Attention: Pretty printed XML doesn't work for requests. 
     * @param input The XML raw data.
     * @param indent The indents width.
     * @return Indented XML or original input if an Exception is thrown internally.
     */

    public static String format(String input, int indent) {
        try {
            Source xmlInput = new StreamSource(new StringReader(input));
            StringWriter stringWriter = new StringWriter();
            StreamResult xmlOutput = new StreamResult(stringWriter);
            TransformerFactory transformerFactory = TransformerFactory
                    .newInstance();
            Transformer transformer = transformerFactory.newTransformer();
            transformer.setOutputProperty(OutputKeys.ENCODING, "UTF-8");
            transformer.setOutputProperty(OutputKeys.OMIT_XML_DECLARATION,
                    "yes");
            transformer.setOutputProperty(OutputKeys.INDENT, "yes");
            transformer.setOutputProperty(
                    "{http://xml.apache.org/xslt}indent-amount",
                    String.valueOf(indent));
            transformer.transform(xmlInput, xmlOutput);
            return xmlOutput.getWriter().toString();
        } catch (IllegalArgumentException | TransformerException e) {
            Logging.getInstance().log(XMLHelper.class, e);
            return input;
        }
    }
}

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