java dom4j解析xml实例

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java利用dom4j解析xml 需要的jar包：
dom4j官方网站在 http://www.dom4j.org/
下载dom4j-1.6.1.zip
解开后有两个包,仅操作XML文档的话把dom4j-1.6.1.jar加入工程就可以了,如果需要使用XPath的话还需要加入包jaxen-1.1-beta-7.jar(如果不导入这个架包程序可以执行出结果，但最后会报异常)
将相关jar包引入后，实际解析操作如下：

1.要解析的xml文件data.xml：

<?xml version="1.0" encoding="UTF-8"?>

<ReturnInfo>

<userlist>

<item index="1" level="60" nickname="凄惨的老生" country="金"

weiwang="136929" />

<item index="2" level="85" nickname="哭泣的至尊宝" country="金"

weiwang="97490" />

<item index="3" level="85" nickname="老公" country="金"

weiwang="91103" />

<item index="4" level="78" nickname="冉闵" country="金"

weiwang="82828" />

<item index="5" level="55" nickname="erggh" country="金"

weiwang="77440" />

<item index="6" level="60" nickname="孤峰" country="金"

weiwang="67821" />

<item index="7" level="60" nickname="乱世" country="金"

weiwang="67675" />

<item index="8" level="62" nickname="叛逆之神" country="金"

weiwang="61839" />

<item index="9" level="60" nickname="双乔主人" country="金"

weiwang="61647" />

<item index="10" level="60" nickname="视觉效果" country="金"

weiwang="50200" />

<item index="11" level="60" nickname="鬼鬼" country="金"

weiwang="49537" />

<item index="12" level="59" nickname="狂龙在天" country="金"

weiwang="46687" />

<item index="13" level="60" nickname="小子" country="金"

weiwang="46152" />

<item index="14" level="52" nickname="zzy" country="金"

weiwang="39017" />

<item index="15" level="53" nickname="ycf" country="金"

weiwang="30333" />

<item index="16" level="52" nickname="无界之魂" country="金"

weiwang="20294" />

<item index="17" level="42" nickname="刀锋狼" country="金"

weiwang="18842" />

<item index="18" level="60" nickname="mnbvc" country="金"

weiwang="18102" />

<item index="19" level="41" nickname="赢政" country="金"

weiwang="16331" />

<item index="20" level="52" nickname="徐匡胤" country="金"

weiwang="16156" />

</userlist>

</ReturnInfo>

2、具体解析程序如下：

package demo4;

import java.io.File;

import java.util.Iterator;

import java.util.List;

import org.dom4j.Document;

import org.dom4j.DocumentException;

import org.dom4j.Element;

import org.dom4j.io.SAXReader;

public class TestJava {

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

		SAXReader reader = new SAXReader();

		Document document = reader.read(new File("D:/data.xml"));

		Element rootElm = document.getRootElement();

		Element root1Elm = rootElm.element("userlist");

		List nodes = root1Elm.elements("item");

		for (Iterator it = nodes.iterator(); it.hasNext();) {

			Element elm = (Element) it.next();

			System.out.println("index:" + elm.attributeValue("index")

					+ " level:" + elm.attributeValue("level") + " nickname:"

					+ elm.attributeValue("nickname") + " country:"

					+ elm.attributeValue("country") + " weiwang:"

					+ elm.attributeValue("weiwang"));

		}

		try {

			Document doc = reader.read(new File("D:/data.xml"));

			List projects = doc.selectNodes("ReturnInfo/userlist/item");

			Iterator it = projects.iterator();

			while (it.hasNext()) {

				Element elm = (Element) it.next();

				System.out.println("index:" + elm.attributeValue("index")

						+ " level:" + elm.attributeValue("level")

						+ " nickname:" + elm.attributeValue("nickname")

						+ " country:" + elm.attributeValue("country")

						+ " weiwang:" + elm.attributeValue("weiwang"));

			}

		} catch (Exception ex) {

			ex.printStackTrace();

		}

	}

}