Java tutorial
//package com.java2s; import org.w3c.dom.DOMConfiguration; import org.w3c.dom.DOMImplementation; import org.w3c.dom.Document; import org.w3c.dom.ls.DOMImplementationLS; import org.w3c.dom.ls.LSOutput; import org.w3c.dom.ls.LSSerializer; import java.io.StringWriter; public class Main { public static String lsSerializePretty(Document doc) { DOMImplementation domImplementation = doc.getImplementation(); if (domImplementation.hasFeature("LS", "3.0") && domImplementation.hasFeature("Core", "2.0")) { DOMImplementationLS domImplementationLS = (DOMImplementationLS) domImplementation.getFeature("LS", "3.0"); LSSerializer lsSerializer = domImplementationLS.createLSSerializer(); DOMConfiguration domConfiguration = lsSerializer.getDomConfig(); if (domConfiguration.canSetParameter("format-pretty-print", Boolean.TRUE)) { lsSerializer.getDomConfig().setParameter("format-pretty-print", Boolean.TRUE); LSOutput lsOutput = domImplementationLS.createLSOutput(); lsOutput.setEncoding("UTF-8"); StringWriter stringWriter = new StringWriter(); lsOutput.setCharacterStream(stringWriter); lsSerializer.write(doc, lsOutput); return stringWriter.toString(); } else { throw new RuntimeException("DOMConfiguration 'format-pretty-print' parameter isn't settable."); } } else { throw new RuntimeException("DOM 3.0 LS and/or DOM 2.0 Core not supported."); } } }