package?com.github.wxpay.sdk;

import?java.io.ByteArrayInputStream;
import?java.io.InputStream;
import?java.io.StringWriter;
import?java.util.*;
import?java.security.MessageDigest;

import?org.w3c.dom.Node;
import?org.w3c.dom.NodeList;

import?javax.crypto.Mac;
import?javax.crypto.spec.SecretKeySpec;
import?javax.xml.parsers.DocumentBuilder;
import?javax.xml.parsers.DocumentBuilderFactory;
import?javax.xml.transform.OutputKeys;
import?javax.xml.transform.Transformer;
import?javax.xml.transform.TransformerFactory;
import?javax.xml.transform.dom.DOMSource;
import?javax.xml.transform.stream.StreamResult;
import?com.github.wxpay.sdk.WXPayConstants.SignType;

import?org.slf4j.Logger;
import?org.slf4j.LoggerFactory;


public?class?WXPayUtil?{

????/**
?????*?xml格式字符串轉換為Map
?????*
?????*?@param?strxml?xml字符串
?????*?@return?xml數據轉換后的Map
?????*?@throws?Exception
?????*/
????public?static?Map?xmlToMap（String?strxml）?throws?Exception?{
????????try?{
????????????Map?data?=?new?HashMap（）;
????????????DocumentBuilderFactory?documentBuilderFactory?=?DocumentBuilderFactory.newInstance（）;
????????????DocumentBuilder?documentBuilder?=?documentBuilderFactory.newDocumentBuilder（）;
????????????InputStream?stream?=?new?ByteArrayInputStream（strxml.getBytes（“UTF-8“））;
????????????org.w3c.dom.Document?doc?=?documentBuilder.parse（stream）;
????????????doc.getDocumentElement（）.normalize（）;
????????????NodeList?nodeList?=?doc.getDocumentElement（）.getChildNodes（）;
????????????for?（int?idx?=?0;?idx?????????????????Node?node?=?nodeList.item（idx）;
????????????????if?（node.getNodeType（）?==?Node.ELEMENT_NODE）?{
????????????????????org.w3c.dom.Element?element?=?（org.w3c.dom.Element）?node;
????????????????????data.put（element.getNodeName（）?element.getTextContent（））;
????????????????}
????????????}
????????????try?{
????????????????stream.close（）;
????????????}?catch?（Exception?ex）?{
????????????????//?do?nothing
????????????}
????????????return?data;
????????}?catch?（Exception?ex）?{
????????????WXPayUtil.getLogger（）.warn（“Invalid?xml?can?not?convert?to?map.?Error?message:?{}.?xml?content:?{}“?ex.getMessage（）?strxml）;
????????????throw?ex;
????????}

????}

????/**
?????*?將Map轉換為xml格式的字符串
?????*
?????*?@param?data?Map類型數據
?????*?@return?xml格式的字符串
?????*?@throws?Exception
?????*/
????public?static?String?mapToxml（Map?data）?throws?Exception?{
????????DocumentBuilderFactory?documentBuilderFactory?=?DocumentBuilderFactory.newInstance（）;
????????DocumentBuilder?documentBuilder=?documentBuilderFactory.newDocumentBuilder（）;
????????org.w3c.dom.Document?document?=?documentBuilder.newDocument（）;
????????org.w3c.dom.Element?root?=?document.createElement（“xml“）;
????????document.appendChild（root）;
????????for?（String?key:?data.keySet（））?{
????????????String?value?=?data.get（key）;
????????????if?（value?==?null）?{
????