SAX解析XML

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);
    }
}