The startElement() method in 
ContentHandler receives as an argument an
Attributes object containing all attributes
 on that tag.
 
public void startElement(String namespaceURI,
 String localName, String qualifiedName, Attributes atts) throws SAXException
The Attributes interface:
package org.xml.sax;
public interface Attributes {
  public int    getLength();
  public String getURI(int index);
  public String getLocalName(int index);
  public String getQName(int index);
  public String getType(int index);
  public String getValue(int index);
  public int    getIndex(String uri, String localName);
  public int    getIndex(String qualifiedName);
  public String getType(String uri, String localName);
  public String getType(String qualifiedName);
  public String getValue(String uri, String localName);
  public String getValue(String qualifiedName);
}