利用SAX方式解析XML文档

ReadXML_JDK .java

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;
import org.xml.sax.SAXException;
public class ReadXML_JDK {
	public ReadXML_JDK() throws ParserConfigurationException, SAXException, IOException{
		SAXParserFactory saxfac = SAXParserFactory.newInstance();
		SAXParser saxparser = saxfac.newSAXParser();
		//InputStream is = new FileInputStream(System.getProperty("user.dir") + File.separator  + "test.xml");//读取当前目录下的文档
		InputStream is = new FileInputStream( "D:\桌面\test.xml");
		saxparser.parse(is,new MySAXHandler());
	}
	public static void main(String[] args) throws ParserConfigurationException, SAXException, IOException {
		new ReadXML_JDK();
	}
}

MySAXHandler .java

import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
import org.xml.sax.helpers.DefaultHandler;
public class MySAXHandler extends DefaultHandler {
	 boolean hasAttribute=false;
     Attributes attributes=null;
    private String currentTag;//当前节点的名称

    public void startdocument() throws SAXException {
             System.out.println("文档开始打印了");
     }

     public void enddocument() throws SAXException {
            System.out.println("文档打印结束了");
     }

     public void startElement(String uri, String localName, String qName,Attributes attributes) throws SAXException {

            if(qName.equals("生物")){
                   return;
            }
            if(qName.equals("哺乳动物")){
               // System.out.println(attributes.getQName(0)+"       "+attributes.getValue(0));
            }
            if(attributes.getLength()>0){
                   this.attributes=attributes;
                   this.hasAttribute=true;
            }
         currentTag = qName;//当前节点名称
     }

     public void endElement(String uri, String localName, String qName)
                   throws SAXException {
            if(hasAttribute&&(attributes!=null)){
                   for(int i=0;i 0) {//标签中的内容
             if(currentTag.equals("哺乳动物"))
             System.out.println(currentTag+ " "+ contents);
         }
     }
}

结果