支持H5、微信小程序支付SDK

package com.example.util; import com.example.util.WXPayConstants.SignType; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import org.springframework.util.StringUtils; 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.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.util.*; public class WXPayUtil { private static final String SYMBOLS = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"; private static final Random RANDOM = new SecureRandom(); /** * 元转换成分 * @Author: weichun * @Date: 2019/12/19 18:20 */ public static Long getMoney(String amount) { if(StringUtils.isEmpty(amount)){ return 0l; } // 金额转化为分为单位 String currency = amount.replaceAll("\\$|\\￥|\\,", ""); //处理包含, ￥ 或者$的金额 int index = currency.indexOf("."); int length = currency.length(); Long amLong = 0l; if(index == -1){ amLong = Long.valueOf(currency+"00"); }else if(length - index >= 3){ amLong = Long.valueOf((currency.substring(0, index+3)).replace(".", "")); }else if(length - index == 2){ amLong = Long.valueOf((currency.substring(0, index+2)).replace(".", "")+0); }else{ amLong = Long.valueOf((currency.substring(0, index+1)).replace(".", "")+"00"); } return amLong; } /** * 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> xmlToMap(String strXML) throws Exception { try { Map<String, String> data = new HashMap<String, String>(); DocumentBuilder documentBuilder = WXPayXmlUtil.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) { WXPayUtil.getLogger().warn("Invalid XML, can not convert to map. Error message: {}. XML content: {}", ex.getMessage(), strXML); throw ex; } } /** * 将Map转换为XML格式的字符串 * * @param data Map类型数据 * @return XML格式的字符串 * @throws Exception */ public static String mapToXml(Map<String, String> data) throws Exception { org.w3c.dom.Document document = WXPayXmlUtil.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; } /** * 生成带有 sign 的 XML 格式字符串 * * @param data Map类型数据 * @param key API密钥 * @return 含有sign字段的XML */ public static String generateSignedXml(final Map<String, String> data, String key) throws Exception { return generateSignedXml(data, key, SignType.MD5); } /** * 生成带有 sign 的 XML 格式字符串 * * @param data Map类型数据 * @param key API密钥 * @param signType 签名类型 * @return 含有sign字段的XML */ public static String generateSignedXml(final Map<String, String> data, String key, SignType signType) throws Exception { String sign = generateSignature(data, key, signType); data.put(WXPayConstants.FIELD_SIGN, sign); return mapToXml(data); } /** * 判断签名是否正确 * * @param xmlStr XML格式数据 * @param key API密钥 * @return 签名是否正确 * @throws Exception */ public static boolean isSignatureValid(String xmlStr, String key) throws Exception { Map<String, String> data = xmlToMap(xmlStr); if (!data.containsKey(WXPayConstants.FIELD_SIGN) ) { return false; } String sign = data.get(WXPayConstants.FIELD_SIGN); return generateSignature(data, key).equals(sign); } /** * 判断签名是否正确，必须包含sign字段，否则返回false。使用MD5签名。 * * @param data Map类型数据 * @param key API密钥 * @return 签名是否正确 * @throws Exception */ public static boolean isSignatureValid(Map<String, String> data, String key) throws Exception { return isSignatureValid(data, key, SignType.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, SignType signType) throws Exception { if (!data.containsKey(WXPayConstants.FIELD_SIGN) ) { return false; } String sign = data.get(WXPayConstants.FIELD_SIGN); return generateSignature(data, key, signType).equals(sign); } /** * 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, SignType.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,