工具類--map 轉成xml xml轉成map

public class WxChatReq {    /**     * Map轉換成XML     * @param data     * @return     * @throws Exception     */    public static String recursionMapToXml(Map<String, String> data) throws Exception {        DocumentBuilderFactory documentBuilderFactory = DocumentBuilderFactory.newInstance();        DocumentBuilder documentBuilder= documentBuilderFactory.newDocumentBuilder();        Document document = documentBuilder.newDocument();        Element root = document.createElement("xml");        document.appendChild(root);        for (String key: data.keySet()) {            String value = data.get(key);            if (value == null) {                value = "";            }            value = value.trim();            Element filed = document.createElement(key);            filed.appendChild(document.createTextNode(value));            root.appendChild(filed);        }        TransformerFactory tf = TransformerFactory.newInstance();        Transformer transformer = tf.newTransformer();        DOMSource source = new DOMSource(document);        transformer.setOutputProperty(OutputKeys.ENCODING, "UTF-8");        transformer.setOutputProperty(OutputKeys.INDENT, "yes");        StringWriter writer = new StringWriter();        StreamResult result = new StreamResult(writer);        transformer.transform(source, result);        String output = writer.getBuffer().toString();        try {            writer.close();        }        catch (Exception ex) {            ex.printStackTrace();        }        output = output.substring(output.indexOf("?>")+2,output.length());        return output;    }    /**     * XML 字符串轉 Map     * @param xmlStr     * @return     */    public static Map<String, String> xml2ToMap(String xmlStr) {        Map<String, String> map = new HashMap<String, String>();        if (isNullorEmpty(xmlStr)) {            throw new IllegalArgumentException("xml is empty");        } else {            Document document = null;            try {                DocumentBuilderFactory documentBuilderFactory = DocumentBuilderFactory.newInstance();                try {                    DocumentBuilder documentBuilder= documentBuilderFactory.newDocumentBuilder();                    InputStream is = new ByteArrayInputStream(xmlStr.getBytes());                    document  =documentBuilder.parse(is);                } catch (ParserConfigurationException e) {                    log.error(e.getMessage(), e);                }            } catch (SAXException e) {                log.error(e.getMessage(), e);            } catch (IOException e) {                log.error(e.getMessage(), e);            }            Element element = document.getDocumentElement();            if (element != null) {                NodeList nodeList = element.getChildNodes();                for (int i = 0; i < nodeList.getLength(); i++) {                    Node node = nodeList.item(i);                    String nodeName = node.getNodeName();                    String nodeText = node.getTextContent();                    if("#text".equals(nodeName)){                        continue;                    }                    map.put(nodeName, nodeText);                }            }        }        return map;    }    public static boolean isNullorEmpty(String xmlStr) {        if (null == xmlStr || "".equals(xmlStr)) {            return true;        } else {            return false;        }    }    public static String createSign(SortedMap<Object, Object> map, String key) {        StringBuffer sb = new StringBuffer();        for (Map.Entry<Object, Object> m : map.entrySet()) {            if ("".equals(m.getValue()) || null == m.getValue()) {                continue;            }            sb.append(m.getKey()).append("=").append(m.getValue()).append("&");        }        sb.append("key=" + key);        return MD5Utils.md5Encode(sb.toString(), "").toUpperCase();    }}