https://docs.oracle.com/javase/tutorial/jaxp/sax/parsing.html

SAXLocalNameCount.java

package sax;

import org.xml.sax.Attributes;
import org.xml.sax.ErrorHandler;
import org.xml.sax.SAXException;
import org.xml.sax.SAXParseException;
import org.xml.sax.XMLReader;
import org.xml.sax.helpers.DefaultHandler;

import java.io.File;
import java.io.PrintStream;
import java.util.Enumeration;
import java.util.Hashtable;

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

public class SAXLocalNameCount extends DefaultHandler {

  private Hashtable<String, Integer> tags;

  @Override
  public void startDocument() {
    tags = new Hashtable<>();
  }

  @Override
  public void startElement(String namespaceURI, String localName, String qName, Attributes attributes) {
    Integer value = tags.get(localName);

    if (value == null) {
      tags.put(localName, 1);
    } else {
      int count = value;
      count++;
      tags.put(localName, count);
    }
  }

  @Override
  public void endDocument() {
    Enumeration<String> e = tags.keys();
    while (e.hasMoreElements()) {
      String tag = e.nextElement();
      int count = tags.get(tag);
      System.out.println("Local Name \"" + tag + "\" occurs " + count + " times");
    }
  }

  private static String convertToFileURL(String filename) {
    String path = new File(filename).getAbsolutePath();
    if (File.separatorChar != '/') {
      path = path.replace(File.separatorChar, '/');
    }

    if (!path.startsWith("/")) {
      path = "/" + path;
    }
    return "file:" + path;
  }

  static public void main(String[] args) throws Exception {
    String filename = null;

    for (int i = 0; i < args.length; i++) {
      filename = args[i];
      if (i != args.length - 1) {
        usage();
      }
    }

    if (filename == null) {
      usage();
    }

    SAXParserFactory spf = SAXParserFactory.newInstance();
    spf.setNamespaceAware(true);
    SAXParser saxParser = spf.newSAXParser();
    XMLReader xmlReader = saxParser.getXMLReader();
    xmlReader.setContentHandler(new SAXLocalNameCount());
    xmlReader.setErrorHandler(new MyErrorHandler(System.err));
    xmlReader.parse(convertToFileURL(filename));
  }

  private static void usage() {
    System.err.println("Usage: SAXLocalNameCount <file.xml>");
    System.err.println("       -usage or -help = this message");
    System.exit(1);
  }

  private static class MyErrorHandler implements ErrorHandler {
    private PrintStream out;

    MyErrorHandler(PrintStream out) {
      this.out = out;
    }

    private String getParseExceptionInfo(SAXParseException spe) {
      String systemId = spe.getSystemId();

      if (systemId == null) {
        systemId = "null";
      }

      return "URI=" + systemId + " Line=" + spe.getLineNumber() + ": " + spe.getMessage();
    }

    public void warning(SAXParseException spe) {
      out.println("Warning: " + getParseExceptionInfo(spe));
    }

    public void error(SAXParseException spe) throws SAXException {
      String message = "Error: " + getParseExceptionInfo(spe);
      throw new SAXException(message);
    }

    public void fatalError(SAXParseException spe) throws SAXException {
      String message = "Fatal Error: " + getParseExceptionInfo(spe);
      throw new SAXException(message);
    }
  }

}

data

• http://people.apache.org/~edwingo/jaxp-ri-1.2.0-fcs/samples/data/rich_iii.xml
• http://people.apache.org/~edwingo/jaxp-ri-1.2.0-fcs/samples/data/play.dtd