Java by API/javax.xml.transform.dom/DOMSource

new DOMSource(Node n)

/**
<?xml version="1.0" encoding="UTF-8"?>
<PHONEBOOK>  <PERSON>   <NAME>Joe Wang</NAME>   <EMAIL>joe@yourserver.ru</EMAIL>   
<TELEPHONE>202-999-9999</TELEPHONE>   <WEB>www.jexp.ru</WEB>  </PERSON>  </PHONEBOOK> 
 * */
import java.io.StringReader;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.transform.Result;
import javax.xml.transform.Source;
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;
import org.xml.sax.InputSource;
public class MainClass {
  public static void main(String[] args) throws Exception{
    DocumentBuilder parser = 
      DocumentBuilderFactory.newInstance().newDocumentBuilder();
    Document document = parser.parse( new InputSource(new StringReader(xmlString)) );
    Transformer transformer = 
      TransformerFactory.newInstance().newTransformer();
    Source source = new DOMSource( document );
    Result output = new StreamResult( System.out );
    transformer.transform( source, output );
  }
  
  static String xmlString = "<PHONEBOOK>" +
      "  <PERSON>" +
      "   <NAME>Joe Wang</NAME>" +
      "   <EMAIL>joe@yourserver.ru</EMAIL>" +
      "   <TELEPHONE>202-999-9999</TELEPHONE>" +
      "   <WEB>www.jexp.ru</WEB>" +
      "  </PERSON>" +
      "  </PHONEBOOK>";  
}