利用Dom4J读取XML文件内容

Java本身可以读取properties文件，不需要引入任何jar包。
但是读取XMl文件，最简单并且容易理解的方式可以利用Dom4J方式
首先需要引入：D:\STARK\编程软件JAR文件\dom4j\dom4j-1.6.1.jar，D:\STARK\编程软件JAR文件\dom4j\jaxen-1.1-beta-6.jar
xmL文件：
<?xml version="1.0" encoding="UTF-8"?>
<config>
<db-info>
<driver-name>oracle.jdbc.driver.OracleDriver</driver-name>
<url>jdbc:oracle:thin:@localhost:1521:oracle</url>
<username>drp</username>
<password>drp</password>
</db-info>
</config>

取得文件：
package com.drp.util;

import org.dom4j.Document;
import org.dom4j.DocumentException;
import org.dom4j.Element;
import org.dom4j.io.SAXReader;

/**
* 读取ＸＭＬ配置文件sys-config.xml
*
* @author WangYue
*
*/
public class ConfigReader {
private static ConfigReader instance = new ConfigReader();
private Document doc;
private JdbcInfo jdbcInfo;

private ConfigReader() {
try {
doc = new SAXReader().read(Thread.currentThread()
.getContextClassLoader().getResourceAsStream(
"sys-config.xml"));
Element driverNameElement = (Element) doc
.selectObject("/config/db-info/driver-name");
Element urlElement = (Element) doc
.selectObject("/config/db-info/url");
Element usernameElement = (Element) doc
.selectObject("/config/db-info/username");
Element passwordElement = (Element) doc
.selectObject("/config/db-info/password");
jdbcInfo = new JdbcInfo();
jdbcInfo.setDriverName(driverNameElement.getStringValue());
jdbcInfo.setUrl(urlElement.getStringValue());
jdbcInfo.setUsername(usernameElement.getStringValue());
jdbcInfo.setPassword(passwordElement.getStringValue());
} catch (DocumentException e) {
e.printStackTrace();
}

}

public JdbcInfo getJdbcInfo() {
return jdbcInfo;

}

public static ConfigReader getInstance() {
return instance;
}

public static void main(String[] args) {
System.out.print(ConfigReader.getInstance().getJdbcInfo());
}
}


运行结果为：
com.drp.util.JdbcInfo{driverName:oracle.jdbc.driver.OracleDriver,url:jdbc:oracle:thin:@localhost:1521:oracle,username:drp,password:drp}