batik svg to xml string

import static org.apache.batik.anim.dom.SVGDOMImplementation.SVG_NAMESPACE_URI;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.OutputStreamWriter;
import java.util.Scanner;

import org.apache.batik.anim.dom.SVGDOMImplementation;
import org.apache.batik.transcoder.TranscoderException;
import org.apache.batik.transcoder.TranscoderInput;
import org.apache.batik.transcoder.TranscoderOutput;
import org.apache.batik.transcoder.svg2svg.SVGTranscoder;
import org.w3c.dom.DOMImplementation;
import org.w3c.dom.Document;
import org.w3c.dom.Element;

public class testmain {

	public static void main(String[] args) {
		DOMImplementation domImplementation = SVGDOMImplementation.getDOMImplementation();
		Document document = domImplementation.createDocument(SVG_NAMESPACE_URI, "svg", null);
		Element root = document.getDocumentElement();
		
		root.setAttributeNS(null,"width",""+400);
		root.setAttributeNS(null, "height", ""+300);
		
		Element rect = document.createElementNS(SVG_NAMESPACE_URI, "rect");
		rect.setAttributeNS(null, "x", "10");
		rect.setAttributeNS(null, "y", "20");
		rect.setAttributeNS(null, "width", "100");
		rect.setAttributeNS(null, "height", "50");
		rect.setAttributeNS(null, "fill", "red");
		
		root.appendChild(rect);
		
		TranscoderInput input = new TranscoderInput(document);
		ByteArrayOutputStream baos = new ByteArrayOutputStream();
		try(OutputStreamWriter osw = new OutputStreamWriter(baos, "UTF-8")){
			TranscoderOutput output = new TranscoderOutput(osw);
			new SVGTranscoder().transcode(input, output);
		} catch (IOException e) {
			e.printStackTrace();
		} catch (TranscoderException e) {
			e.printStackTrace();
		}
		ByteArrayInputStream bais = new ByteArrayInputStream(baos.toByteArray());
		try(Scanner sc = new Scanner(bais)){
			while(sc.hasNext()){
				System.out.println(sc.nextLine());
			}
		}
	}
	
}