package hdu.fang.parser;

import hdu.fang.model.Video;

import java.util.ArrayList;
import java.util.List;

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

public class XMLSaxReader extends DefaultHandler {
    private List<Video> videos = null;
    private Video video = null;
    private Long timeLength = null;
    private String tag = null;

    @Override
    public void startDocument() throws SAXException {
        videos = new ArrayList<Video>();
    }

    @Override
    public void startElement(String uri, String localName, String qName,
            Attributes attributes) throws SAXException {
        if ("durl".equals(qName)) {
            video = new Video();
        }

        tag = qName;
    }

    @Override
    public void endElement(String uri, String localName, String qName)
            throws SAXException {
        if ("durl".equals(qName)) {
            videos.add(video);
            video = null;
        }
        tag = null;
    }

    @Override
    public void characters(char[] ch, int start, int length)
            throws SAXException {
        if (tag != null) {
            String data = new String(ch, start, length);
            if ("timelength".equals(tag)) {
                timeLength = Long.valueOf(data);
            } else if ("order".equals(tag)) {
                video.setOrder(Integer.valueOf(data));
            } else if ("url".equals(tag)) {
                video.setUrl(data);
            } else if ("length".equals(tag)) {
                video.setLength(Integer.valueOf(data));
            }
        }
    }

     
    public List<Video> getVideos() {
        return videos;
    }

    public long getLength() {
        return timeLength;
    }
}

SAXParserFactory sf = SAXParserFactory.newInstance();
SAXParser sp = sf.newSAXParser();
XMLSaxReader reader = new XMLSaxReader();
InputStream in_withcode = new ByteArrayInputStream(
    xml.getBytes("UTF-8"));//xml就是刚得到的xml文件，类型String
sp.parse(in_withcode, reader);
videos=reader.getVideos();//得到Video List
timeLength=reader.getLength();//得到视频长度
System.out.println(videos);