复制代码 代码如下:

import java.util.Iterator;

import java.util.List;

import org.dom4j.Attribute;

import org.dom4j.Document;

import org.dom4j.DocumentHelper;

import org.dom4j.Element;

public class Test {

@SuppressWarnings("unchecked")

public static void main(String[] args) throws Exception {

String xml = "<request> <param name='service'>single_trade_query </param><param name='_input_charset'>utf-8 </param><param name='partner'>2088001513232645 </param><param name='out_trade_no'>20090422577264 </param></request>";

Document document = DocumentHelper.parseText(xml);

Element root = document.getRootElement();

List<Element> elements = root.elements();

for (Iterator<Element> it = elements.iterator(); it.hasNext();) {

Element element = it.next();

List<Attribute> attributes = element.attributes();

for (int i = 0; i < attributes.size(); i++) {

Attribute attribute = attributes.get(i);

if ("service".equals(attribute.getText())) {

System.out.println(element.getName() + " : "

+ element.getText());

}

}

}

}

}

或者：

复制代码 代码如下:

import java.io.StringReader;

import java.util.Iterator;

import java.util.List;

import org.dom4j.Document;

import org.dom4j.Element;

import org.dom4j.io.SAXReader;

import org.xml.sax.InputSource;

public class Test {

@SuppressWarnings("unchecked")

public static void main(String[] args) throws Exception {

String xml = "<servlet><description></description><display-name>TestServlet</display-name><servlet-name>TestServlet</servlet-name><servlet-class>test.TestServlet</servlet-class></servlet>";

InputSource in = new InputSource(new StringReader(xml));

in.setEncoding("UTF-8");

SAXReader reader = new SAXReader();

Document document = reader.read(in);

Element root = document.getRootElement();

List<Element> elements = root.elements();

for(Iterator<Element> it = elements.iterator();it.hasNext();){

Element element = it.next();

System.out.println(element.getName()+" : "+element.getTextTrim());

}

}

}

或者增加ID属性，直接通过ID获取某个属性值：

复制代码 代码如下:

import java.io.StringReader;

import org.dom4j.Document;

import org.dom4j.DocumentException;

import org.dom4j.Element;

import org.dom4j.io.SAXReader;

import org.xml.sax.InputSource;

public class Test {

public static void main(String args[]) {

String xml = "<request> <param name='service' ID='tt'>single_trade_query </param><param name='_input_charset'>utf-8 </param><param name='partner'>2088001513232645 </param><param name='out_trade_no'>20090422577264 </param></request>";

InputSource source = new InputSource(new StringReader(xml));

SAXReader reader = new SAXReader();

Document document = null;

try {

document = reader.read(source);

} catch (DocumentException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

Element root = document.getRootElement();

System.out.println(document.elementByID("tt").getTextTrim());

System.out.println(root.elementByID("tt").getTextTrim());

}

}

注意：通过ID获取，元素ID属性名必须为“大写ID”，小写的“id”会认为是普通属性！

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