import java.io.ByteArrayInputStream;
 
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.transform.OutputKeys;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;
 
import org.w3c.dom.Document;
 
public class Main {
	public static void main(String[] args) {
		try {
			String input = "<asdf>\n\n<a>text</a></asdf>";
			Document doc = DocumentBuilderFactory.newInstance().newDocumentBuilder().parse(new ByteArrayInputStream(input.getBytes()));
 
			System.out.println("-- input -------------------\n" + input + "\n----------------------------");
			System.out.println("-- output ------------------");
			prettify(doc);
			System.out.println("----------------------------");
 
		} catch (Exception e) {}
	}
 
	public static void prettify(Document doc) {
		try {
			TransformerFactory transformerFactory = TransformerFactory.newInstance();
			Transformer transformer = transformerFactory.newTransformer();
			transformer.setOutputProperty(OutputKeys.OMIT_XML_DECLARATION, "no");
			transformer.setOutputProperty(OutputKeys.METHOD, "xml");
			transformer.setOutputProperty(OutputKeys.INDENT, "yes");
			transformer.setOutputProperty(OutputKeys.ENCODING, "UTF-8");
			transformer.setOutputProperty("{http://x...content-available-to-author-only...e.org/xslt}indent-amount", "2");
			transformer.transform(new DOMSource(doc), new StreamResult(System.out));
		} catch (Exception e) {}
	}
}
 

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