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使用XPath查找XML中的元素
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‎README.md‎

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* [Spring IBatis Struts2 集成之一：Spring与IBatis集成 | Spring IBatis Struts2 Integration I: Spring Integrates with IBatis](http://aofengblog.blog.163.com/blog/static/6317021201121911105510/)
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* [Spring IBatis Struts2 集成之二：Spring与Struts2集成 | Spring IBatis Struts2 Integration II: Spring Integrates with Struts2](http://aofengblog.blog.163.com/blog/static/6317021201122172525296/)
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##XML
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* [XPath](src/cn/aofeng/demo/xml/XPathDemo.java)
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## EJB
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* [EJB3 - 使用Eclipse和JBoss开发和部署Session Bean | How to create Session Bean using JBoss and Eclipse](http://aofengblog.blog.163.com/blog/static/6317021201121310318552/)
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* [EJB3 - 使用Eclipse和JBoss开发和部署Entity Bean | How to create Entity Bean using JBoss and Eclipse](http://aofengblog.blog.163.com/blog/static/631702120112147279187/)

‎src/cn/aofeng/demo/xml/BookStore.xml‎

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<?xml version="1.0" encoding="UTF-8"?>
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<bookstore>
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<!-- 中文书本信息 -->
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<book>
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<title lang="cn">Java并发编程实战</title>
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<author>Brian Goetz / Tim Peierls / Joshua Bloch / Joseph Bowbeer / David Holmes / Doug Lea</author>
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<year>2012</year>
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<price>69</price>
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</book>
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<!-- 英文书本信息 -->
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<book>
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<title lang="en">Java Concurrency in Practice</title>
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<author>Brian Goetz / Tim Peierls / Joshua Bloch / Joseph Bowbeer / David Holmes / Doug Lea</author>
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<year>2006</year>
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<price>59.99</price>
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</book>
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<book>
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<title lang="de">德文书</title>
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<author>德国</author>
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<year>2014</year>
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<price>50</price>
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</book>
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<book>
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<title>没有lang属性</title>
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<author>试试</author>
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<year>2016</year>
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</book>
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</bookstore>

‎src/cn/aofeng/demo/xml/XPathDemo.java‎

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package cn.aofeng.demo.xml;
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import javax.xml.xpath.XPath;
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import javax.xml.xpath.XPathConstants;
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import javax.xml.xpath.XPathExpressionException;
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import javax.xml.xpath.XPathFactory;
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import org.w3c.dom.Node;
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import org.w3c.dom.NodeList;
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import org.xml.sax.InputSource;
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/**
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* XPath语法实践。
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*
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* @author <a href="mailto:[email protected]">聂勇</a>
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*/
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public class XPathDemo {
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public static void main(String[] args) throws XPathExpressionException {
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InputSource ins = new InputSource(XPathDemo.class.getResourceAsStream("/cn/aofeng/demo/xml/BookStore.xml"));
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XPathFactory factory = XPathFactory.newInstance();
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XPath xpath = factory.newXPath();
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NodeList result = (NodeList) xpath.evaluate("//title[@lang='de']", ins, XPathConstants.NODESET);
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for (int i = 0; i < result.getLength(); i++) {
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Node node = result.item(i);
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StringBuilder buffer = new StringBuilder()
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.append("NodeName=").append(node.getNodeName()).append(", ")
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.append("NodeValue=").append(node.getNodeValue()).append(", ")
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.append("Text=").append(node.getTextContent());
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System.out.println(buffer.toString());
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}
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}
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}

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