Untitled

<html>
<body>
<div>text</div>
</body>
</html>

import javax.xml.stream.Location;
import javax.xml.stream.XMLInputFactory;
import javax.xml.stream.XMLStreamReader;

public class Runner {

public static void main(String argv[]) {

    XMLInputFactory factory = XMLInputFactory.newInstance();
    try{
    XMLStreamReader streamReader = factory.createXMLStreamReader(
           new FileReader("D:\BigFile.xml"));

    while(streamReader.hasNext()){
        streamReader.next();
        if(streamReader.getEventType() == XMLStreamReader.START_ELEMENT){
            Location location = streamReader.getLocation();
            System.out.println("byte location: " + location.getCharacterOffset());
            }
        }
    } catch(Exception e){
        e.printStackTrace();
    }