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Using Java to parse XML documents, there are two most commonly used methods: using event-based XML Simple API (Simple API for XML) called SAX and tree- and node-based Document Object Model (Document Object Module) called DOM .
Sun provides a Java API for XML Parsing (JAXP) interface to use SAX and DOM. Through JAXP, we can use any JAXP-compatible XML parser. The JAXP interface contains three packages:
org.w3c.dom The interface recommended by W3C for the XML standard planning document object model.
org.xml.sax Event-driven XML Simple API (SAX) for parsing XML
javax.xml.parsers parser factory tool that programmers obtain and configure special special parser.
java XML parser
import java.io.FileInputStream; import java.io.FileNotFoundException; import java.io.IOException; import java.io.InputStream; import javax.xml.parsers.DocumentBuilder; import javax.xml.parsers.DocumentBuilderFactory; import javax.xml.parsers.ParserConfigurationException; import org.w3c.dom.Document; import org.w3c.dom.Element; import org.w3c.dom.Node; import org.w3c.dom.NodeList; import org.xml.sax.SAXException; public class DomParse { public DomParse(){ DocumentBuilderFactory domfac=DocumentBuilderFactory.newInstance(); try { DocumentBuilder dombuilder=domfac.newDocumentBuilder(); InputStream is=new FileInputStream("WebRoot/WEB-INF/hell.xml"); Document doc=dombuilder.parse(is); Element root=doc.getDocumentElement(); NodeList books=root.getChildNodes(); if(books!=null){ for(int i=0;i<books.getLength();i++){ Node book=books.item(i); if(book.getNodeType()==Node.ELEMENT_NODE){ String email=book.getAttributes().getNamedItem("email").getNodeValue(); System.out.println(email); for(Node node=book.getFirstChild();node!=null;node=node.getNextSibling()){ if(node.getNodeType()==Node.ELEMENT_NODE){ if(node.getNodeName().equals("name")){ String name=node.getNodeValue(); String name1=node.getFirstChild().getNodeValue(); System.out.println(name); System.out.println(name1); } if(node.getNodeName().equals("price")){ String price=node.getFirstChild().getNodeValue(); System.out.println(price); } } } } } } } catch (ParserConfigurationException e) { e.printStackTrace(); } catch (FileNotFoundException e) { e.printStackTrace(); } catch (SAXException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } } public static void main(String[] args) { new DomParse(); } }
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