java xml 转 map / map 转 xml

    /**     * map转xml map中没有根节点的键     *      * @param map     * @param rootName     * @return     */    public static Document map2xml(Map<String, Object> map, String rootName) {        Document doc = DocumentHelper.createDocument();// 创建一个Document对象        Element root = DocumentHelper.createElement(rootName); // 创建根节点        doc.add(root);        map2xml(map, root);        return doc;    }

    /**     * map转xml     *      * @param map     * @param body     * @return     */    @SuppressWarnings({ "rawtypes", "unchecked" })    private static Element map2xml(Map<String, Object> map, Element body) {        Set<Entry<String, Object>> entries = map.entrySet();        for (Entry<String, Object> entry : entries) {            String key = entry.getKey();            Object value = entry.getValue();            if (key.startsWith("@")) {// 属性                body.addAttribute(key.substring(1, key.length()), value.toString());            } else if (key.equals("#text")) { // 有属性时的文本                body.setText(value.toString());            } else {                if (value instanceof java.util.List) {                    List list = (List) value;                    Object obj;                    for (int i = 0; i < list.size(); i++) {                        obj = list.get(i);                        // list里是map或String，不会存在list里直接是list的                        if (obj instanceof java.util.Map) {                            Element subElement = body.addElement(key);                            map2xml((Map) list.get(i), subElement);                        } else {                            body.addElement(key).setText((String) list.get(i));                        }                    }                } else if (value instanceof java.util.Map) {                    Element subElement = body.addElement(key);                    map2xml((Map) value, subElement);                } else {                    body.addElement(key).setText(value.toString());                }            }        }        return body;    }

    /**     * 格式化输出xml     *      * @param document     * @return     * @throws DocumentException     * @throws IOException     */    public static String formatXml(Document document) throws DocumentException, IOException {        // 格式化输出格式        OutputFormat format = OutputFormat.createPrettyPrint();        // format.setEncoding("UTF-8");        StringWriter writer = new StringWriter();        // 格式化输出流        XMLWriter xmlWriter = new XMLWriter(writer, format);        // 将document写入到输出流        xmlWriter.write(document);        xmlWriter.close();        return writer.toString();    }

参照：原博客