Parsing XML with a simple SAX document handler : SAX « XML « Java Tutorial

1. Java Tutorial
2. XML
3. SAX

import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;

import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
import org.xml.sax.helpers.DefaultHandler;

public class Main {
  public static void main(String[] argv) throws Exception {
    SAXParserFactory factory = SAXParserFactory.newInstance();
    SAXParser parser = factory.newSAXParser();
    SaxHandler handler = new SaxHandler();
    parser.parse("sample.xml", handler);
  }
}

class SaxHandler extends DefaultHandler {
  public void startDocument() throws SAXException {
    System.out.println("Document processing started");
  }
  public void endDocument() throws SAXException {
    System.out.println("Document processing finished");
  }

  public void startElement(String uri, String localName, String qName, Attributes attrs)
      throws SAXException {
    if (qName.equals("order")) {
    } else if (qName.equals("date")) {
    } else {
      throw new IllegalArgumentException("Element '" + qName + "' is not allowed here");
    }
  }

  public void endElement(String uri, String localName, String qName) throws SAXException {
  }
}