<?xml version="1.0" encoding="UTF-8" standalone="no" ?> 
<root>
    <row>
        <element id="1" text="000"/>
        <element id="2" text="0000"/>
        <element id="3" text="00000"/>
     </row>
</root>

/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
package javaapplication25;

import java.io.File;
import java.io.IOException;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerException;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.xml.sax.SAXException;
 

public class JavaApplication25  {


	public static void main(String argv[]) {
 
	   try {
		String filepath = "D:\\A\file.xml";
		DocumentBuilderFactory docFactory = DocumentBuilderFactory.newInstance();
		DocumentBuilder docBuilder = docFactory.newDocumentBuilder();
		Document doc = docBuilder.parse(filepath);
 //задаем значение атрибута
Element element = doc.getElementById("2");
element.setAttribute("text", "someNewValue");
// используем Transformer для записи файла
TransformerFactory tFactory = TransformerFactory.newInstance();
Transformer transformer = tFactory.newTransformer();
DOMSource source = new DOMSource(doc);
StreamResult result = new StreamResult(new File(filepath));
		transformer.transform(source, result);	
 		System.out.println("Done");
 
	   } catch (ParserConfigurationException pce) {
		pce.printStackTrace();
	   } catch (TransformerException tfe) {
		tfe.printStackTrace();
	   } catch (IOException ioe) {
		ioe.printStackTrace();
	   } catch (SAXException sae) {
		sae.printStackTrace();
	   }
	}
}

java.net.MalformedURLException: unknown protocol: d
	at java.net.URL.<init>(URL.java:593)
	at java.net.URL.<init>(URL.java:483)
	at java.net.URL.<init>(URL.java:432)
	at com.sun.org.apache.xerces.internal.impl.XMLEntityManager.setupCurrentEntity(XMLEntityManager.java:613)
	at com.sun.org.apache.xerces.internal.impl.XMLVersionDetector.determineDocVersion(XMLVersionDetector.java:189)
	at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:812)
	at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:777)
	at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(XMLParser.java:141)
	at com.sun.org.apache.xerces.internal.parsers.DOMParser.parse(DOMParser.java:243)
	at com.sun.org.apache.xerces.internal.jaxp.DocumentBuilderImpl.parse(DocumentBuilderImpl.java:348)
	at javax.xml.parsers.DocumentBuilder.parse(DocumentBuilder.java:177)
	at javaapplication25.JavaApplication25.main(JavaApplication25.java:34)
СБОРКА УСПЕШНО ЗАВЕРШЕНА (общее время: 1 секунда)