map转xml：

/**
 * map集合转xml报文
 * @param map
 * @param sb
 */
public static void mapToXML(Map<?, ?> map, StringBuffer sb) {
    Set<?> set = map.keySet();
    for (Iterator<?> it = set.iterator(); it.hasNext();) {
        String key = (String) it.next();
        Object value = map.get(key);
        if (value instanceof Map) {
            sb.append("<" + key + ">\n");
            mapToXML((Map<?, ?>) value, sb);
            sb.append("</" + key + ">\n");
        } else if (value instanceof List) {
            List<?> list = (List<?>) map.get(key);
            for (int i = 0; i < list.size(); i++) {
                sb.append("<" + key + ">\n");
                Map<?, ?> hm = (Map<?, ?>) list.get(i);
                mapToXML(hm, sb);
                sb.append("</" + key + ">\n");
            }
        } else {
            sb.append("<" + key + ">" + value + "</" + key + ">\n");
        }
    }
}

xml转map：

/**
 * xml报文转map集合
 * @param xmlInfo
 * @return
 */
public static Map xmlToMap(String xmlInfo) {
    Map map_finall = new LinkedHashMap();
    try {
        Document doc = DocumentHelper.parseText(xmlInfo);
        Element rootElement = doc.getRootElement();
        map_finall.put(rootElement.getName(), diGui(rootElement));
    } catch (DocumentException e) {
        throw new ServiceBizException("报文转Document失败：" + e.getMessage());
    }
    return map_finall;
}

/**
 * 利用递归将xml报文转成map集合实现
 * @param rootElement
 * @return
 */
private static Object diGui(Element rootElement) {
    int flag = hasChrid(rootElement);
    // 如果没有子节点，直接返回数据
    if(flag == 1) {
        return rootElement.getData();
    } else {
        Iterator<Element> iterator = rootElement.elementIterator();
        Map map_children = new LinkedHashMap();
        while (iterator.hasNext()) {
            Element childelement = iterator.next();
            int child_flag = hasChrid(childelement);
            if(child_flag == 1) {
                map_children.put(childelement.getName(), childelement.getData());
            } else {
                Map children = (Map) diGui(childelement);
                map_children.put(childelement.getName(), children);
            }
        }
        return map_children;
    }
}

/**
 * 判断节点是否存在子节点
 * 1不存在，0存在
 * @param rootElement
 * @return
 */
private static int hasChrid(Element rootElement) {
    // 判断是否有子节点，1默认为没有子节点
    int flag = 1;
    Iterator<Element> iterator = rootElement.elementIterator();
    if(iterator.hasNext()) {
        flag = 0;
    }
    return flag;
}