Java HTML/XML - 如何从SAX解析器工厂获得SAX功能

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

public class Main {
  public static void main(String args[]) throws Exception {
    SAXParserFactory spf = SAXParserFactory.newInstance();
    spf.setNamespaceAware(true);
    spf.setValidating(true);
    System.out.println("Parser will " + (spf.isNamespaceAware() ? "" : "not ")
        + "be namespace aware");
    System.out.println("Parser will " + (spf.isValidating() ? "" : "not ")
        + "validate XML");

    SAXParser parser = spf.newSAXParser();
    System.out.println("Parser object is: " + parser);
  }
}