SAX解析xml学习之爬网工具
发布时间:2020-12-15 22:30:27 所属栏目:百科 来源:网络整理
导读:package af.qian.test;import java.io.IOException;import java.io.InputStream;import java.net.MalformedURLException;import java.net.URL;import javax.xml.parsers.ParserConfigurationException;import javax.xml.parsers.SAXParser;import javax.xml.
package af.qian.test; import java.io.IOException; import java.io.InputStream; import java.net.MalformedURLException; import java.net.URL; import javax.xml.parsers.ParserConfigurationException; import javax.xml.parsers.SAXParser; import javax.xml.parsers.SAXParserFactory; import javax.xml.stream.XMLInputFactory; import javax.xml.stream.XMLStreamConstants; import javax.xml.stream.XMLStreamException; import javax.xml.stream.XMLStreamReader; import org.xml.sax.*; import org.xml.sax.helpers.*; import junit.framework.TestCase; public class XMLTest extends TestCase { /** * sax解析xml * @throws ParserConfigurationException * @throws SAXException * @throws MalformedURLException * @throws IOException */ public void test_001() throws ParserConfigurationException,SAXException,MalformedURLException,IOException { SAXParserFactory factory = SAXParserFactory.newInstance(); factory.setNamespaceAware(true); SAXParser parser = factory.newSAXParser(); DefaultHandler handler = new DefaultHandler(){ public void startElement(String namespaceURI,String lname,String qname,Attributes attrs){ if(lname.equals("a")&&attrs!=null){ for(int i=0;i<attrs.getLength();i++){ String aname = attrs.getLocalName(i); if(aname.equals("href")) System.out.println(attrs.getValue(i)); } } } }; InputStream in = new URL("http://www.w3c.org").openStream(); parser.parse(in,handler); } /** * stax测试xml程序 * @throws IOException * @throws XMLStreamException */ public void test_002() throws IOException,XMLStreamException{ URL url= new URL("http://www.w3c.org"); InputStream in = url.openStream(); XMLInputFactory factory = XMLInputFactory.newInstance(); XMLStreamReader parser = factory.createXMLStreamReader(in); while(parser.hasNext()){ int event = parser.next(); if(event == XMLStreamConstants.START_ELEMENT){ if(parser.getLocalName().equals("a")){ String href = parser.getAttributeValue(null,"href"); if(href!=null){ System.out.println(href); } } } } } } (编辑:李大同) 【声明】本站内容均来自网络,其相关言论仅代表作者个人观点,不代表本站立场。若无意侵犯到您的权利,请及时与联系站长删除相关内容! |