使用SAX验证XML格式--DTD验证

刚写了一个DOM验证XML格式的，现在来一个SAX验证。并附上两个源码

package com;

import java.io.File;
import java.io.IOException;

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

import org.xml.sax.SAXException;
import org.xml.sax.SAXParseException;
import org.xml.sax.helpers.DefaultHandler;

class SAXValidator {
public static void main(String[] args) {
try {
String fileName = "conf/invalid_dtd.xml";
File x = new File(fileName);
SAXParserFactory f = SAXParserFactory.newInstance();
f.setValidating(true); // Default is false
SAXParser p = f.newSAXParser();
DefaultHandler h = new MyErrorHandler();
p.parse(x, h);
} catch (ParserConfigurationException e) {
System.out.println(e.toString());
} catch (SAXException e) {
System.out.println(e.toString());
} catch (IOException e) {
System.out.println(e.toString());
}
}

private static class MyErrorHandler extends DefaultHandler {
public void warning(SAXParseException e) throws SAXException {
System.out.println("Warning: ");
printInfo(e);
}

public void error(SAXParseException e) throws SAXException {
System.out.println("Error: ");
printInfo(e);
}

public void fatalError(SAXParseException e) throws SAXException {
System.out.println("Fattal error: ");
printInfo(e);
}

private void printInfo(SAXParseException e) {
System.out.println("   Public ID: " + e.getPublicId());
System.out.println("   System ID: " + e.getSystemId());
System.out.println("   Line number: " + e.getLineNumber());
System.out.println("   Column number: " + e.getColumnNumber());
System.out.println("   Message: " + e.getMessage());
}
}
}