Parse an XML file with SAX parser

In this chapter you will learn:

How to parse XML file with SAX parser

Parse a file

We can pass in file directly to SAX parser and get the XML file parsed.

import java.io.File;
//from  java2  s  .  c  o m
import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;

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

public class Main {
  public static void main(String args[]) throws Exception {
    File xmlFile = new File("data.xml");
    DefaultHandler handler = new TrySAX();
    process(xmlFile, handler);
  }

  private static void process(File file, DefaultHandler handler)
      throws Exception {
    SAXParserFactory spf = SAXParserFactory.newInstance();
    spf.setNamespaceAware(true);
    spf.setValidating(true);
    SAXParser parser = spf.newSAXParser();
    parser.parse(file, handler);
  }
}

class TrySAX extends DefaultHandler {

  public void startDocument() {
    System.out.println("Start document: ");
  }

  public void endDocument() {
    System.out.println("End document: ");
  }

  public void startElement(String uri, String localName, String qname,
      Attributes attr) {
    System.out.println("Start element: local name: " + localName + " qname: "
        + qname + " uri: " + uri);
  }

  public void endElement(String uri, String localName, String qname) {
    System.out.println("End element: local name: " + localName + " qname: "
        + qname + " uri: " + uri);
  }

  public void characters(char[] ch, int start, int length) {
    System.out.println("Characters: " + new String(ch, start, length));
  }

  public void ignorableWhitespace(char[] ch, int start, int length) {
    System.out
        .println("Ignorable whitespace: " + new String(ch, start, length));
  }
}

Here is the data.xml file.

<data>/*from  jav a  2s  .  c  o  m*/
  <employee>
    <name>Tom</name>
    <title>Manager</title>
  </employee>
  <employee>
    <name>Jerry</name>
    <title>Programmer</title>
  </employee>
</data>