java解析xml文件，请教各位！！

Question

xml文件内容：<devices>
<device id="htc" user_agent="Mozilla">
    <group id="product_info">
      <capability name="model_name" value="Desire ADR6200"/>
              <capability name="user_name" value="andy"/>
    </group>
    <group id="xhtml_ui">
      <capability name="cookie" value="false"/>
    </group>
</device>
</devices>现在需要通过java来解析这个文件，不知道dom解析是否可以；我需要获取的内容:1.device标签上user_agent属性的值；
2.group标签中id为product_info下面capability标签name为model_name的：name和value这个xml文件中会有很多个device节点，请高人给出java解析代码，万分感谢！！！分不多了望谅解！

Answer 1

import org.dom4j.*;
import org.dom4j.io.SAXReader;import java.util.List;public class XmlDemo {    public static void main(String[] args) throws Exception {
        SAXReader reader = new SAXReader();
        Document doc = reader.read("demo.xml");        // device[@user_agent]
        // 查找有user_agent属性的device节点
        XPath xpathSelector = DocumentHelper.createXPath("//device[@user_agent]");
        List nodes = xpathSelector.selectNodes(doc);        for (Object obj : nodes) {
            Element n = (Element) obj;
            System.out.println(n.attribute("user_agent").getText());
        }
    }
}输出：
Mozilla
Safari
Firefoxdemo.xml
<?xml version="1.0" encoding="UTF-8"?>
<devices>
    <device id="htc" user_agent="Mozilla">
        <group id="product_info">
            <capability name="model_name" value="Desire ADR6200"/>
            <capability name="user_name" value="andy"/>
        </group>
        <group id="xhtml_ui">
            <capability name="cookie" value="false"/>
        </group>
    </device>
    <device id="htc" user_agent="Safari">
        <group id="product_info">
            <capability name="model_name" value="Desire ADR6200"/>
            <capability name="user_name" value="andy"/>
        </group>
        <group id="xhtml_ui">
            <capability name="cookie" value="false"/>
        </group>
    </device>
    <device id="htc" user_agent="Firefox">
        <group id="product_info">
            <capability name="model_name" value="Desire ADR6200"/>
            <capability name="user_name" value="andy"/>
        </group>
        <group id="xhtml_ui">
            <capability name="cookie" value="false"/>
        </group>
    </device>
</devices>

Answer 2

对应的user_agent下面的
<group id="product_info">
            <capability name="model_name" value="Desire ADR6200"/>
            <capability name="user_name" value="andy"/>
        </group>name和value要如何取出，我自己试了下，还没出来，还望指导，谢谢