java xml转json demo

import java.io.ByteArrayInputStream;import java.io.File;import java.io.InputStream;import java.util.HashMap;import java.util.LinkedList;import java.util.List;import java.util.Map;import net.sf.json.JSONObject;import org.jdom.Document;import org.jdom.Element;import org.jdom.input.SAXBuilder;public class Xml2JsonUtil {/** * 转换一个xml格式的字符串到json格式 *  * @param xml *            xml格式的字符串 * @return 成功返回json 格式的字符串;失败反回null */@SuppressWarnings("unchecked")public static  String xml2JSON(String xml) {JSONObject obj = new JSONObject();try {InputStream is = new ByteArrayInputStream(xml.getBytes("utf-8"));SAXBuilder sb = new SAXBuilder();Document doc = sb.build(is);Element root = doc.getRootElement();obj.put(root.getName(), iterateElement(root));return obj.toString();} catch (Exception e) {e.printStackTrace();return null;}}/** * 转换一个xml格式的字符串到json格式 *  * @param file *            java.io.File实例是一个有效的xml文件 * @return 成功反回json 格式的字符串;失败反回null */@SuppressWarnings("unchecked")public static String xml2JSON(File file) {JSONObject obj = new JSONObject();try {SAXBuilder sb = new SAXBuilder();Document doc = sb.build(file);Element root = doc.getRootElement();obj.put(root.getName(), iterateElement(root));return obj.toString();} catch (Exception e) {e.printStackTrace();return null;}}/** * 一个迭代方法 *  * @param element *            : org.jdom.Element * @return java.util.Map 实例 */@SuppressWarnings("unchecked")private static Map  iterateElement(Element element) {List jiedian = element.getChildren();Element et = null;Map obj = new HashMap();List list = null;for (int i = 0; i < jiedian.size(); i++) {list = new LinkedList();et = (Element) jiedian.get(i);if (et.getTextTrim().equals("")) {if (et.getChildren().size() == 0)continue;if (obj.containsKey(et.getName())) {list = (List) obj.get(et.getName());}list.add(iterateElement(et));obj.put(et.getName(), list);} else {if (obj.containsKey(et.getName())) {list = (List) obj.get(et.getName());}list.add(et.getTextTrim());obj.put(et.getName(), list);}}return obj;}// 测试public static void main(String[] args) {System.out.println(  Xml2JsonUtil.xml2JSON("<MapSet>"+ "<MapGroup id='Sheboygan'>" + "<Map>"+ "<Type>MapGuideddddddd</Type>"+ "<SingleTile>true</SingleTile>" + "<Extension>"+ "<ResourceId>ddd</ResourceId>" + "</Extension>" + "</Map>"+ "<Map>" + "<Type>ccc</Type>" + "<SingleTile>ggg</SingleTile>"+ "<Extension>" + "<ResourceId>aaa</ResourceId>"+ "</Extension>" + "</Map>" + "<Extension />" + "</MapGroup>"+ "<ddd>" + "33333333" + "</ddd>" + "<ddd>" + "444" + "</ddd>"+ "</MapSet>"));}}