sax 读取xml

import org.dom4j.Document;
import org.dom4j.Element;
import org.dom4j.io.OutputFormat;
import org.dom4j.io.SAXReader;
import org.dom4j.io.XMLWriter;
import org.xml.sax.Attributes;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;
import org.xml.sax.helpers.DefaultHandler;

import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.util.Iterator;
import java.util.List;

import javax.sql.rowset.spi.XmlWriter;
import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;

class Test extends DefaultHandler{
   
    private StringBuffer buf;
    private String str;
    public Test(){
        super();
    }
   
//    public void setDocumentLocator(Locator locator){}
    @Override
    public void startDocument() throws SAXException{
        buf=new StringBuffer();
        System.out.println("*******开始解析文档*******");
    }
    @Override
    public void endDocument() throws SAXException{       
        System.out.println("*******文档解析结束*******");
    }
    @Override
    public void startPrefixMapping( String prefix, String uri ){
        System.out.println(" 前缀映射: " + prefix +" 开始!"+ " 它的URI是:" + uri);
    }
    @Override
    public void endPrefixMapping( String prefix ){
        System.out.println(" 前缀映射: "+prefix+" 结束!");
    }
   
//    public void processingInstruction( String target, String instruction )throws SAXException{}
   
//    public void ignorableWhitespace( char[] chars, int start, int length ) throws SAXException {}
   
//    public void skippedEntity( String name ) throws SAXException {}
    @Override
    public void startElement(String namespaceURI,String localName,String qName,Attributes atts){
        System.out.println("*******开始解析元素*******");   
        System.out.println("元素名"+qName);       
        for(int i=0;i<atts.getLength();i++){
            System.out.println("元素名"+atts.getLocalName(i)+"属性值"+atts.getValue(i));
        }
    }
    @Override
    public void endElement(String namespaceURI,String localName,String fullName )throws SAXException{
//        buf.trimToSize();
        str = buf.toString();
        System.out.println("buf = "+buf+" || length = "+buf.length());
        System.out.println("str = "+str.trim()+" || length = "+str.trim().length());
        buf.delete(0,buf.length());
        System.out.println("******"+namespaceURI+"元素解析结束"+localName+"********"+fullName);
    }
    @Override
    public void characters( char[] chars, int start, int length )throws SAXException{
        //将元素内容累加到StringBuffer中
        buf.append(chars,start,length);
    }
   
    public static void main(String args[]){
        try{
            SAXParserFactory sf = SAXParserFactory.newInstance();
            SAXParser sp = sf.newSAXParser();
            Test Test=new Test();
            sp.parse(new File("F:/text.xml"),Test);
        }catch(IOException e){
            e.printStackTrace();
        }catch(SAXException e){
            e.printStackTrace();
        }catch(Exception e){
            e.printStackTrace();
        }
    }
}

 

xml:

<?xml version="1.0" encoding="gb2312"?>
<person>
<name>王小明</name>
<college>信息学院</college>
<telephone>6258113</telephone>
<notes>男,1955年生,博士，95年调入海南大学</notes>
</person>