一个简单dom4j读取xml文件的例子

XML配置文件内容如下:

<?xml version="1.0" encoding="UTF-8"?><config><db-info><driver-name>oracle.jdbc.driver.OracleDriver</driver-name><url>jdbc:oracle:thin:@127.0.0.1:1521:ORCL</url><username>username</username><password>password</password></db-info></config>?

读取XML程序如下,利用单例模式:

package com.king.drp.util;import org.dom4j.Document;import org.dom4j.DocumentException;import org.dom4j.Element;import org.dom4j.io.SAXReader;/** * 采用单例模式读取xml配置文件sys-config.xml * @author lijike * */public class ConfigReader {    //静态的私有成员变量private static ConfigReader instance = new ConfigReader();//公共的静态入口方法public static ConfigReader getInstance() {return instance;}private Document doc;private JdbcInfo jdbcInfo;public JdbcInfo getJdbcInfo() {return jdbcInfo;}//私有的构造方法private ConfigReader() {try {doc = new SAXReader().read(Thread.currentThread().getContextClassLoader().getResourceAsStream("sys-config.xml"));Element driverNameElt = (Element)doc.selectObject("/config/db-info/driver-name");Element urlElt = (Element)doc.selectObject("/config/db-info/url");Element usernameElt = (Element)doc.selectObject("/config/db-info/username");Element passwordElt = (Element)doc.selectObject("/config/db-info/password");jdbcInfo = new JdbcInfo();jdbcInfo.setDriverName(driverNameElt.getStringValue());jdbcInfo.setUrl(urlElt.getStringValue());jdbcInfo.setUsername(usernameElt.getStringValue());jdbcInfo.setPassword(passwordElt.getStringValue());} catch (DocumentException e) {e.printStackTrace();}}}

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