saxlister.java

全面的展示了SAX解析XML文件的强大威力

/*
 * Created on 2005-11-20
 *
 * TODO To change the template for this generated file go to
 * Window - Preferences - Java - Code Style - Code Templates
 */
/*
 * Copyright (c) Ian F. Darwin, http://www.darwinsys.com/, 1996-2002.
 * All rights reserved. Software written by Ian F. Darwin and others.
 * $Id: LICENSE,v 1.8 2004/02/09 03:33:38 ian Exp $
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS''
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 * 
 * Java, the Duke mascot, and all variants of Sun's Java "steaming coffee
 * cup" logo are trademarks of Sun Microsystems. Sun's, and James Gosling's,
 * pioneering role in inventing and promulgating (and standardizing) the Java 
 * language and environment is gratefully acknowledged.
 * 
 * The pioneering role of Dennis Ritchie and Bjarne Stroustrup, of AT&T, for
 * inventing predecessor languages C and C++ is also gratefully acknowledged.
 */

import java.io.IOException;

import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
import org.xml.sax.XMLReader;
import org.xml.sax.helpers.DefaultHandler;
import org.xml.sax.helpers.XMLReaderFactory;
/**
 * @author Administrator
 *
 * TODO To change the template for this generated type comment go to
 * Window - Preferences - Java - Code Style - Code Templates
 */
public class SAXLister {
	  public static void main(String[] args) throws Exception {
	    new SAXLister(args);
	  }

	  public SAXLister(String[] args) throws SAXException, IOException {
	    XMLReader parser = XMLReaderFactory.createXMLReader();
	    // should load properties rather than hardcoding class name
	    parser.setContentHandler(new PeopleHandler());
	    parser.parse(args.length == 1 ? args[0] : "people.xml");
	  }

	  /**
	   * Inner class provides DocumentHandler
	   */
	  class PeopleHandler extends DefaultHandler {
	    boolean person = false;

	    boolean email = false;

	    public void startElement(String nsURI, String localName,
	        String rawName, Attributes attributes) throws SAXException {
	      // Consult rawName since we aren't using xmlns prefixes here.
	      if (rawName.equalsIgnoreCase("name"))
	        person = true;
	      if (rawName.equalsIgnoreCase("email"))
	        email = true;
	    }

	    public void characters(char[] ch, int start, int length) {
	      if (person) {
	        System.out.println("Person:  " + new String(ch, start, length));
	        person = false;
	      } else if (email) {
	        System.out.println("Email: " + new String(ch, start, length));
	        email = false;
	      }
	    }
	  }
	}