package com.xml.zh;

import javax.xml.parsers.ParserConfigurationException;

import javax.xml.parsers.SAXParser;

import javax.xml.parsers.SAXParserFactory;

import org.xml.sax.*;

import org.xml.sax.SAXException;

import org.xml.sax.helpers.DefaultHandler;

public class SaxTest {

    /**

     * 运用Sax技术来操作xml

     * @param args

     * @throws SAXException

     * @throws Exception

     */

    public static void main(String[] args) throws Exception{

        // TODO Auto-generated method stub

        //1.创建SaxparseFactory

        SAXParserFactory spf =SAXParserFactory.newInstance();

        //2.创建Saxparser解析器

        SAXParser saxparser = spf.newSAXParser();

        //3.把xml文件的事件处理对象关联

        saxparser.parse("src/class.xml",new defaultHander());

    }

}

//定义事件处理类

class defaultHander extends DefaultHandler{

    boolean isName=false;

    //发现文档的文本

    @Override

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

            throws SAXException {

        // TODO Auto-generated method stub

        //遍历某一个元素的文本

        if(!new String(ch,start,length).trim().equals("") && isName)

            System.out.println(new String(ch,start,length));

        //遍历

        //System.out.println(new String(ch,start,length));

        super.characters(ch, start, length);

    }

    //发现文档的结束

    @Override

    public void endDocument() throws SAXException {

        // TODO Auto-generated method stub

        super.endDocument();

    }

    //发现文档的一个元素的结束

    @Override

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

            throws SAXException {

        // TODO Auto-generated method stub

        super.endElement(uri, localName, qName);

    }

    //发现文档的开始

    @Override

    public void startDocument() throws SAXException {

        // TODO Auto-generated method stub

        super.startDocument();

    }

    //发现xml文档的一个元素开始

    @Override

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

            Attributes attributes) throws SAXException {

        // TODO Auto-generated method stub

        //System.out.println("name = "+qName);

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

            isName = true;

        }else{

            isName = false;

        }

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

    }

}