saxtest.java

java解析xml的例子

package xmlexample; 
import javax.xml.parsers.*; 
import org.xml.sax.*; 
import org.xml.sax.helpers.*; 
import java.io.*; 
public class SaxTest extends DefaultHandler { 
// 重载DefaultHandler类的方法 
// 以拦截SAX事件通知。 
// 
// 关于所有有效事件，见org.xml.sax.ContentHandler 
// 
public void startDocument( ) throws SAXException { 
System.out.println( "SAX Event: START DOCUMENT" ); 
} 
public void endDocument( ) throws SAXException { 
System.out.println( "SAX Event: END DOCUMENT" ); 
} 
public void startElement( String namespaceURI, 
String localName, 
String qName, 
Attributes attr ) throws SAXException { 
System.out.println( "SAX Event: START ELEMENT[ " + 
localName + " ]" ); 
// 如果有属性，我们也一并打印出来．．． 
for ( int i = 0; i < attr.getLength(); i++ ){ 
System.out.println( " ATTRIBUTE: " + 
attr.getLocalName(i) + 
" VALUE: " + 
attr.getValue(i) ); 
} 
} 
public void endElement( String namespaceURI, 
String localName, 
String qName ) throws SAXException { 
System.out.println( "SAX Event: END ELEMENT[ " + 
localName + " ]" ); 
} 
public void characters( char[] ch, int start, int length ) 
throws SAXException { 
System.out.print( "SAX Event: CHARACTERS[ " ); 
try { 
OutputStreamWriter outw = new OutputStreamWriter(System.out); 
outw.write( ch, start,length ); 
outw.flush(); 
} catch (Exception e) { 
e.printStackTrace(); 
} 
System.out.println( " )" ); 
}
public static void main( String[] argv ){ 
System.out.println( "Example1 SAX Events:" ); 
try { 
// SAXParserFactory spFactory = SAXParserFactory.newInstance(); 
// SAXParser sParser = spFactory.newSAXParser(); 
// 建立SAX 2解析器．．． 
XMLReader xr = XMLReaderFactory.createXMLReader
("org.apache.xerces.parsers.SAXParser"); 
// 安装ContentHandler．．． 
xr.setContentHandler( new SaxTest() ); 
// 解析文件．．． 
xr.parse( new InputSource( 
new FileReader( "exampleA.xml" )) ); 
}catch ( Exception e ) { 
e.printStackTrace(); 
} 
} 
}