微信支付工具类(微信支付工具类型怎么选)

  本篇文章为你整理了微信支付工具类(微信支付工具类型怎么选)的详细内容,包含有微信支付工具类别怎么选 微信支付工具类型怎么选 微信支付工具包 微信支付工具的功能 微信支付工具类,希望能帮助你了解 微信支付工具类。

  import javax.xml.parsers.DocumentBuilder;

  import javax.xml.parsers.DocumentBuilderFactory;

  import javax.xml.parsers.ParserConfigurationException;

   * 2018/7/3

  public final class WechatPayXmlUtil {

   public static DocumentBuilder newDocumentBuilder() throws ParserConfigurationException {

   DocumentBuilderFactory documentBuilderFactory = DocumentBuilderFactory.newInstance();

   documentBuilderFactory.setFeature("http://apache.org/xml/features/disallow-doctype-decl", true);

   documentBuilderFactory.setFeature("http://xml.org/sax/features/external-general-entities", false);

   documentBuilderFactory.setFeature("http://xml.org/sax/features/external-parameter-entities", false);

   documentBuilderFactory.setFeature("http://apache.org/xml/features/nonvalidating/load-external-dtd", false);

   documentBuilderFactory.setFeature(XMLConstants.FEATURE_SECURE_PROCESSING, true);

   documentBuilderFactory.setXIncludeAware(false);

   documentBuilderFactory.setExpandEntityReferences(false);

   return documentBuilderFactory.newDocumentBuilder();

   public static Document newDocument() throws ParserConfigurationException {

   return newDocumentBuilder().newDocument();

  

 

 

  WechatPayUtil

  点击查看代码

  

import com.kgc.scd.constant.WechatPayConstant;

 

  import lombok.extern.slf4j.Slf4j;

  import org.w3c.dom.Node;

  import org.w3c.dom.NodeList;

  import javax.xml.parsers.DocumentBuilder;

  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 java.io.ByteArrayInputStream;

  import java.io.InputStream;

  import java.io.StringWriter;

  import java.security.MessageDigest;

  import java.security.SecureRandom;

  import java.time.LocalDateTime;

  import java.time.format.DateTimeFormatter;

  import java.util.*;

   * Created On : 3/11/2022.

   * p

   * Author : huayu

   * p

   * Description: WechatPayUtil

  @Slf4j

  public class WechatPayUtil {

   //随机字符库

   private static final String SYMBOLS = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";

   //随机字符对象

   private static final Random RANDOM = new SecureRandom();

   * @author : huayu

   * @date : 3/11/2022

   * @param : []

   * @return : java.lang.String

   * @description : 获取随机字符串 Nonce Str 支持指定长度

   public static String generateNonceStr(int length) {

   //限制随机字符串的长度

   if(length 6 length 32){

   length = 32;

   //根据指定的长度生成随机字符串

   char[] nonceChars = new char[length];

   for (int index = 0; index nonceChars.length; ++index) {

   nonceChars[index] = SYMBOLS.charAt(RANDOM.nextInt(SYMBOLS.length()));

   return new String(nonceChars);

   * @author : huayu

   * @date : 3/11/2022

   * @param : []

   * @return : java.lang.String

   * @description : 获取随机字符串 Nonce Str 固定长度32

   public static String generateNonceStr() {

   return generateNonceStr(32);

   * @author : huayu

   * @date : 3/11/2022

   * @param : []

   * @return : java.lang.String

   * @description : 获取随机字符串 Nonce Str 使用UUID

   public static String generateNonceStrUUID(int length) {

   return (length 6 length 32)

   ? UUID.randomUUID().toString().replace("-","").substring(0,32)

   : generateNonceStr(32);

  
* @return : java.lang.String

   * @description : 生成内部订单号,要求32个字符内(最少6个字符),只能是数字、大小写字母

   public static String generateTradeOrderNo(){

   // 系统内订单号规则:统一头标识 + 时间戳 + 随机序号

   return new StringBuilder(WechatPayConstant.WECHAT_PAY_TRADE_ORDER_PREFIX )

   .append(LocalDateTime.now().format(DateTimeFormatter.ofPattern(WechatPayConstant.WECHAT_PAY_TIME_PATTERN_ALL)))

   .append(generateNonceStr(6)).toString();

   * 生成签名

   * @param data 待签名数据

   * @param key API密钥

   * @return 签名

   public static String generateSignature(final Map String, String data, String key) throws Exception {

   return generateSignature(data, key, WechatPayConstant.WECHAT_PAY_SIGN_TYPE_MD5);

   * 生成签名. 注意,若含有sign_type字段,必须和signType参数保持一致。

   * @param data 待签名数据

   * @param key API密钥

   * @param signType 签名方式

   * @return 签名

   public static String generateSignature(final Map String, String data, String key, String signType) throws Exception {

   Set String keySet = data.keySet();

   String[] keyArray = keySet.toArray(new String[keySet.size()]);

   Arrays.sort(keyArray);

   StringBuilder sb = new StringBuilder();

   for (String k : keyArray) {

   if (k.equals(WechatPayConstant.WECHAT_PAY_FIELD_SIGN)) {

   continue;

   if (data.get(k).trim().length() 0) // 参数值为空,则不参与签名

   sb.append(k).append("=").append(data.get(k).trim()).append("

   sb.append("key=").append(key);

   if (WechatPayConstant.WECHAT_PAY_SIGN_TYPE_MD5.equals(signType)) {

   return MD5(sb.toString()).toUpperCase();

   else {

   throw new Exception(String.format("Invalid sign_type: %s", signType));

  
public static String MD5(String data) throws Exception {

   java.security.MessageDigest md = MessageDigest.getInstance("MD5");

   byte[] array = md.digest(data.getBytes("UTF-8"));

   StringBuilder sb = new StringBuilder();

   for (byte item : array) {

   sb.append(Integer.toHexString((item 0xFF) 0x100).substring(1, 3));

   return sb.toString().toUpperCase();

  
public static String generateMapToXml(Map String, String data) throws Exception {

   org.w3c.dom.Document document = WechatPayXmlUtil.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) {

   value = "";

   value = value.trim();

   org.w3c.dom.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(); //.replaceAll("\n\r", "");

   try {

   writer.close();

   catch (Exception ex) {

   return output;

   * XML格式字符串转换为Map

   * @param strXML XML字符串

   * @return XML数据转换后的Map

   * @throws Exception

   public static Map String, String generateXmlToMap(String strXML) throws Exception {

   try {

   Map String, String data = new HashMap String, String

   DocumentBuilder documentBuilder = WechatPayXmlUtil.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 nodeList.getLength(); ++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) {

   log.warn("Invalid XML, can not convert to map. Error message: {}. XML content: {}", ex.getMessage(), strXML);

   throw ex;

  
public static boolean isSignatureValid(Map String, String data, String key) throws Exception {

   return isSignatureValid(data, key, WechatPayConstant.WECHAT_PAY_SIGN_TYPE_MD5);

   * 判断签名是否正确,必须包含sign字段,否则返回false。

   * @param data Map类型数据

   * @param key API密钥

   * @param signType 签名方式

   * @return 签名是否正确

   * @throws Exception

   public static boolean isSignatureValid(Map String, String data, String key, String signType) throws Exception {

   if (!data.containsKey(WechatPayConstant.WECHAT_PAY_FIELD_SIGN) ) {

   return false;

   String sign = data.get(WechatPayConstant.WECHAT_PAY_FIELD_SIGN);

   return generateSignature(data, key, signType).equals(sign);

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