locatordemo.java

JAVA与XML处理一个重要方法是SAX,该包提供了11个常用程序,下载后可以根据具体情况对改进.这11个程序都已调试过.包括对XML的各种处理.建议先下载这个.

import org.xml.sax.*;
import org.xml.sax.helpers.XMLReaderFactory;

public class LocatorDemo implements ContentHandler
{
	private Locator locator;
	public void setDocumentLocator(Locator locator)
	{
		this.locator=locator;
	}
	private void printLocation(String s)
	{
		int line=locator.getLineNumber();
		int column=locator.getColumnNumber();
		System.out.println(
			s+" at line "+line+";column "+column
		);
	}
	
	public void characters(char[] text, int start, int length)
	throws SAXException{
	   printLocation("characters())");
	}		

	public void startDocument() {
		printLocation("startDocument()");
	}
	public void endDocument() {
		printLocation("endDocument()");
	}
	public void startPrefixMapping(String prefix, String uri) {
		printLocation("startPrefixMapping()");
	}	
	public void endPrefixMapping(String prefix) {
		printLocation("startPrefixMapping()");
	}
	
	public void startElement(String namespaceURI, String localName,
	   String qualifiedName, Attributes atts) {
	   	printLocation("startElement()");
	}
	public void endElement(String namespaceURI, String localName, 
	   String qualifiedName)  {
	   	printLocation("endElement()");
	}
	public void ignorableWhitespace(char[] text, int start, 
	   int length) throws SAXException {
	   	printLocation("ignorableWhitespace()");
	}
	public void processingInstruction(String target, String data) {
		printLocation("processingInstruction()");
	}
	public void skippedEntity(String name) {
		printLocation("skippedEntity()");
	}
	public static void main(String[] args)
	{
		if(args.length==0)
		{
			System.out.println("Usage:java SAXSpider URL1");
		}
		String uri=args[0];
		try
		{
			XMLReader parser = XMLReaderFactory.createXMLReader();
			ContentHandler handler=new LocatorDemo();
			parser.parse(uri);
		}
		catch(Exception e){
			System.err.println(e);}
	}
}