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转自：http://blog.csdn.net/arjick/article/details/6251777

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需要json-lib-2.1-jdk15.jar和xom-1.2.5.jar，maven pom.xml如下：

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		<dependency>
			<groupId>net.sf.json-lib</groupId>
			<artifactId>json-lib</artifactId>
			<version>2.1</version>
			<classifier>jdk15</classifier>
		</dependency>

		<dependency>
			<groupId>xom</groupId>
			<artifactId>xom</artifactId>
			<version>1.2.5</version>
			<type>jar</type>
			<scope>compile</scope>
		</dependency>

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package com.shine.framework.core.util;
import java.io.ByteArrayOutputStream;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;

import net.sf.json.JSON;
import net.sf.json.JSONSerializer;
import net.sf.json.xml.XMLSerializer;

import org.dom4j.Document;
import org.dom4j.DocumentHelper;
import org.dom4j.Element;
import org.dom4j.io.OutputFormat;
import org.dom4j.io.XMLWriter;

/**
 * common xml conver utility
 * 
 * @author viruscodecn@gmail.com
 * @version Framework 2010.10.26
 * @url http://blog.csdn.net/arjick/article/details/6251777
 */
public class XmlConverUtil {
	/**
	 * map to xml xml <node><key label="key1">value1</key><key
	 * label="key2">value2</key>......</node>
	 * 
	 * @param map
	 * @return
	 */
	public static String maptoXml(Map map) {
		Document document = DocumentHelper.createDocument();
		Element nodeElement = document.addElement("node");
		for (Object obj : map.keySet()) {
			Element keyElement = nodeElement.addElement("key");
			keyElement.addAttribute("label", String.valueOf(obj));
			keyElement.setText(String.valueOf(map.get(obj)));
		}
		return doc2String(document);
	}

	/**
	 * list to xml xml <nodes><node><key label="key1">value1</key><key
	 * label="key2">value2</key>......</node><node><key
	 * label="key1">value1</key><key
	 * label="key2">value2</key>......</node></nodes>
	 * 
	 * @param list
	 * @return
	 */
	public static String listtoXml(List list) throws Exception {
		Document document = DocumentHelper.createDocument();
		Element nodesElement = document.addElement("nodes");
		int i = 0;
		for (Object o : list) {
			Element nodeElement = nodesElement.addElement("node");
			if (o instanceof Map) {
				for (Object obj : ((Map) o).keySet()) {
					Element keyElement = nodeElement.addElement("key");
					keyElement.addAttribute("label", String.valueOf(obj));
					keyElement.setText(String.valueOf(((Map) o).get(obj)));
				}
			} else {
				Element keyElement = nodeElement.addElement("key");
				keyElement.addAttribute("label", String.valueOf(i));
				keyElement.setText(String.valueOf(o));
			}
			i++;
		}
		return doc2String(document);
	}

	/**
	 * json to xml {"node":{"key":{"@label":"key1","#text":"value1"}}} conver
	 * <o><node class="object"><key class="object"
	 * label="key1">value1</key></node></o>
	 * 
	 * @param json
	 * @return
	 */
	public static String jsontoXml(String json) {
		try {
			XMLSerializer serializer = new XMLSerializer();
			JSON jsonObject = JSONSerializer.toJSON(json);
			return serializer.write(jsonObject);
		} catch (Exception e) {
			e.printStackTrace();
		}
		return null;
	}

	/**
	 * xml to map xml <node><key label="key1">value1</key><key
	 * label="key2">value2</key>......</node>
	 * 
	 * @param xml
	 * @return
	 */
	public static Map xmltoMap(String xml) {
		try {
			Map map = new HashMap();
			Document document = DocumentHelper.parseText(xml);
			Element nodeElement = document.getRootElement();
			List node = nodeElement.elements();
			for (Iterator it = node.iterator(); i