DOM Parser Error

In this chapter you will learn:

How t handle DOM Parser Error

Handle DOM Parser Error

The following code shows how to create and use a custom error handler for DOM XML parser.

In the hard coded XML data the ending tag is dat, which is wrong and should be data.

import java.io.StringReader;
/*from j  a  va  2  s. c  o m*/
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;

import org.w3c.dom.Document;
import org.xml.sax.ErrorHandler;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;
import org.xml.sax.SAXParseException;

public class Main {

  public static void main(String[] args) throws Exception {
    InputSource is = new InputSource();
    is.setCharacterStream(new StringReader(xmlRecords));
    
    DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
    DocumentBuilder db = dbf.newDocumentBuilder();
    db.setErrorHandler(new MyErrorHandler());
    Document doc = db.parse(is);
  }
  static String xmlRecords = 
      "<data>" +
      "  <employee>" +
      "    <name>Tom</name>"+ 
      "    <title>Manager</title>" +
      "  </employee>" +
      "  <employee>" +
      "    <name>Jerry</name>"+ 
      "    <title>Programmer</title>" +
      "  </employee>" +
      "</dat>";//should be data
}

class MyErrorHandler implements ErrorHandler {
  public void warning(SAXParseException e) throws SAXException {
    show("Warning", e);
    throw (e);
  }

  public void error(SAXParseException e) throws SAXException {
    show("Error", e);
    throw (e);
  }

  public void fatalError(SAXParseException e) throws SAXException {
    show("Fatal Error", e);
    throw (e);
  }

  private void show(String type, SAXParseException e) {
    System.out.println(type + ": " + e.getMessage());
    System.out.println("Line " + e.getLineNumber() + " Column "
        + e.getColumnNumber());
    System.out.println("System ID: " + e.getSystemId());
  }
}