dom4j 解析 xml 遍历方法和使用Xpath访问

提供一个xml文件

<?xml version="1.0" encoding="UTF-8"?>
<sys-config>
<db-info>
<driver-name>com.mysql.jdbc.Driver</driver-name>
<url>jdbc:mysql://localhost:3306/drp</url>
<user>root</user>
<password>root</password>
</db-info>
</sys-config>

import java.util.Iterator;
import java.util.List;


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


public class XMLReader {

遍历xml文件  注：先在项目中导入一个包dom4j.rar
/* public static void main(String[] args) {
try {
SAXReader sr = new SAXReader();
Document doc = sr.read("src/sys-config.xml");
Element eRoot = doc.getRootElement();
Iterator it = eRoot.elementIterator();
while (it.hasNext()) {
Object o = it.next();
Element eRow = (Element)o;
Iterator itRow = eRow.elementIterator();
while(itRow.hasNext()) {
Element eName = (Element)itRow.next();
System.out.println(eName.getText());
}
}
} catch (DocumentException e) {
e.printStackTrace();
}
}
*/
拿到xml文件某一个节点的值  注：先在项目中导入两个包dom4j.rar和jaxen.rar（访问XPATH用）
public static void main(String[] args) {
SAXReader sr = new SAXReader();
Document doc;
try {
doc = sr.read("src/sys-config.xml");
List<Element> li = doc.selectNodes("/sys-config/db-info/driver-name"); //XPATH
if(li != null) {
for(int i=0; i<li.size(); i++) {
Element eName = li.get(i);
System.out.println(eName.getStringValue());
}
}
} catch (DocumentException e) {
e.printStackTrace();
}


}
}