package ls.xml;

import java.io.StreamCorruptedException;

import javax.xml.stream.events.EndElement;

import javax.xml.stream.events.StartElement;

import org.xml.sax.Attributes;

import org.xml.sax.SAXException;

import org.xml.sax.helpers.DefaultHandler;

public class SAXParserHandler extends DefaultHandler {

    //遍历xml文件的开始标签

    @Override

    public void startElement(String uri, String localName, String qName,

            Attributes attributes) throws SAXException {

        super.startElement(uri, localName, qName, attributes);

        if(qName.equals("book")){

            System.out.println("================开始遍历一本书===============");

            //System.out.println("book的属性值："+attributes.getValue("id"));

            int num = attributes.getLength();

            for (int i = 0; i < num; i++) {

                System.out.println("book的第"+(i+1)+"个属性"+attributes.getQName(i)+"--属性值："+attributes.getValue(i));

            }

        }else if(!qName.equals("book")&&!qName.equals("bookstore")){

             System.out.print("节点名是："+qName);

        }

    }

    //遍历xml文件的结束标签

    @Override

    public void endElement(String uri, String localName, String qName)

            throws SAXException {

        super.endElement(uri, localName, qName);

        //判断一本书结束

        if(qName.equals("book")){

            System.out.println("================结束遍历一本书===============");

        }

    }

    //标志解析开始

    @Override

    public void startDocument() throws SAXException {

        super.startDocument();

        System.out.println("SAX解析开始");

    }

    //标志解析结束

    @Override

    public void endDocument() throws SAXException {

        super.endDocument();

        System.out.println("SAX解析结束");

    }

    //获取节点值,自动调用

    @Override

    public void characters(char[] ch, int start, int length)

            throws SAXException {

        super.characters(ch, start, length);

        String value = new String(ch,start,length);

        if(!value.trim().equals(""))

             System.out.println("--节点值是："+value);

    }

}