Java JAXP 解析XML

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用Java解析XML文档,最常用的有两种方法:使用基于事件的XML简单API (Simple API for XML)称为SAX和基于树和节点的文档对象模型(Document Object Module)称为DOM。Sun公司提供了Java API for XML Parsing(JAXP)接口来使用SAX和DOM,通过JAXP,我们可以使用任何与JAXP兼容的XML解析器。 
JAXP接口包含了三个包: 
(1)org.w3c.dom W3C推荐的用于XML标准规划文档对象模型的接口。 
(2)org.xml.sax 用于对XML进行语法分析的事件驱动的XML简单API(SAX) 
(3)javax.xml.parsers解析器工厂工具,程序员获得并配置特殊的特殊语法分析器。 
package com.vianoz.xmlparse;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 XMLParse {public XMLParse() {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 XMLParse();}}

 

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