Java SAX-Parser Beispiel

Java SAX-Parser BeispielNovember 2019

Schon alt, aber gelegentlich nützlich: der SAX-Parser. Hier ein Beispiel:

package xmlparser;
 
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.Reader;
 
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;
 
import org.xml.sax.Attributes;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;
import org.xml.sax.helpers.DefaultHandler;
 
public class Parser {
   
    public static class MyHandler extends DefaultHandler {
       
        @Override
        public void startElement(String uri, String localName, String qName, Attributes attributes) throws SAXException {
            System.out.println("start: "+qName);
        }
       
        @Override
        public void endElement(String uri, String localName, String qName) throws SAXException {
            System.out.println("end: "+qName);
        }
       
        @Override
        public void characters(char[] ch, int start, int length) throws SAXException {
            System.out.println("chars: " + new String(ch, start, length));
        }
    }
       
    public static void parse(InputStream inputStream) throws ParserConfigurationException, SAXException, IOException{
       
        SAXParserFactory factory = SAXParserFactory.newInstance();
        SAXParser saxParser = factory.newSAXParser();
       
        Reader reader = new InputStreamReader(inputStream, "UTF-8");
       
        InputSource is = new InputSource(reader);
        is.setEncoding("UTF-8");
       
        MyHandler handler = new MyHandler();
        saxParser.parse(is, handler);
       
    }
 
    public static void main(String[] args) throws FileNotFoundException, IOException, ParserConfigurationException, SAXException{
        File file = new File("serviceDatenModular.xml");
        try (InputStream inputStream = new FileInputStream(file)){
            parse(inputStream);
        }
    }
   
}