微信扫码支付
2019-06-11 12:14
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业务需求
商户自定义金额生成二维码，扫描二维码进行自定义金额支付
官方文档链接
https://pay.weixin.qq.com/wiki/doc/api/native.php?chapter=6_4
接口代码
@RequestMapping(value = "/companyReceipt")
@ResponseBody
public String companyReceipt(TTemplatePay tTemplatePay) throws Exception {
JSONObject jsonObject = new JSONObject();
PayUtil payUtil = new PayUtil();
String codeUrl = "";
// 公众账号ID
payUtil.setAppid(PAY_APPID);
// 商户号
payUtil.setMch_id(PAY_MCH_ID);
payUtil.setOut_trade_no(WeixinpayUtil.getUUID());
payUtil.setNonce_str(WeixinpayUtil.getUUID());
// 通知地址(支付成功，回调接口地址)
payUtil.setNotify_url(NOTIFY_URL);
// 自定义支付金额（单位：分）
payUtil.setTotal_fee(tTemplatePay.getTotalFee()*100);
LOGGER.info("------企业支付生成支付二维码，支付金额money{}", payUtil.getTotal_fee());
// 企业指定金额生成支付二维码
Map<String, Object> map = WxCompanyReceiptUtil.wxCompanyReceipt(payUtil);
if(StringUtils.equals("SUCCESS", map.get("result_code").toString()) && StringUtils.equals("SUCCESS", map.get("return_code").toString())){
tTemplatePay.setOutTradeNo(payUtil.getOut_trade_no());
tTemplatePay.setNonceStr(payUtil.getNonce_str());
// 支付订单信息添加到数据库
int i = payService.insertTemplateOrder(tTemplatePay);
if(i > 0){
// 二维码链接
codeUrl = map.get("code_url").toString();
jsonObject.accumulate("codeUrl", codeUrl);
LOGGER.info("------企业支付生成支付二维码，支付二维码链接{}", codeUrl);
LOGGER.info("------企业生成支付二维码，扫码支付订单入库{}", "SUCCESS");
}else{
LOGGER.info("------企业生成支付二维码，扫码支付订单入库{}", "ERROR");
}
}else{
LOGGER.info("------企业生成支付二维码{}", "ERROR");
}
return jsonObject.toString();
}
组装参数请求获取二维码
package com.litte.util;
import com.litte.entity.PayUtil;
import com.litte.util.wxpay.WXPayUtil;
import java.util.Map;
public class WxCompanyReceiptUtil {
/**
* @Description: 企业指定金额生成支付二维码
* @Author: Mr.Jkx
* @Date: 2019/4/10 10:40
*/
public static Map<String, Object> wxCompanyReceipt(PayUtil payUtil) throws Exception {
String stringA = "appid=" + payUtil.getAppid()
+ "&body=商品描述"
+ "&mch_id=" + payUtil.getMch_id()
+ "&nonce_str=" + payUtil.getNonce_str()
+ "¬ify_url=" + "https://www.xinxingshangstar.com/wxPay/companyReceiptBack"
+ "&out_trade_no=" + payUtil.getOut_trade_no()
+ "&spbill_create_ip=Ip" // 终端IP
+ "&total_fee="+ payUtil.getTotal_fee()
+ "&trade_type=NATIVE"
+ "&key=xinxingshang2018xinxingshang2018";
String sign = Md5Util.md5(stringA).toUpperCase();
String xml = "<xml>" +
" <appid>" + payUtil.getAppid() + "</appid>" +
" <body>商品描述</body>" +
" <mch_id>" + payUtil.getMch_id() + "</mch_id>" +
" <nonce_str>" + payUtil.getNonce_str() + "</nonce_str>" +
" <notify_url>NOTIFY_URL</notify_url>" +
" <out_trade_no>" + payUtil.getOut_trade_no() + "</out_trade_no>" +
" <spbill_create_ip>Ip</spbill_create_ip>" +
" <total_fee>" + payUtil.getTotal_fee() + "</total_fee>" +
" <trade_type>NATIVE</trade_type>" +
" <sign>" + sign + "</sign>" +
"</xml> ";
System
1a4bb
.out.println("调试模式_统一下单接口 请求XML数据：" + xml);
//调用统一下单接口，并接受返回的结果
String result = BasePay.httpRequest("https://api.mch.weixin.qq.com/pay/unifiedorder", "POST", xml);
// 将解析结果存储在HashMap中
Map map = WXPayUtil.xmlToMap(result);
return map;
}
}
请求方法类
package com.litte.util;
import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.net.HttpURLConnection;
import java.net.URL;
public class BasePay {
/**
*
* *
* * @param requestUrl请求地址
* * @param requestMethod请求方法
* * @param outputStr参数
*
*/
public static String httpRequest(String requestUrl, String requestMethod, String outputStr) {
// 创建SSLContext
StringBuffer buffer = null;
try {
URL url = new URL(requestUrl);
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
conn.setRequestMethod(requestMethod);
conn.setDoOutput(true);
conn.setDoInput(true);
conn.connect();
//往服务器端写内容
if (null != outputStr) {
OutputStream os = conn.getOutputStream();
os.write(outputStr.getBytes("utf-8"));
os.close();
}
// 读取服务器端返回的内容
InputStream is = conn.getInputStream();
InputStreamReader isr = new InputStreamReader(is, "utf-8");
BufferedReader br = new BufferedReader(isr);
buffer = new StringBuffer();
String line = null;
while ((line = br.readLine()) != null) {
buffer.append(line);
}
br.close();
} catch (Exception e) {
e.printStackTrace();
}
return buffer.toString();
}
}
支付后回调请求接口
/**
* @Description: 企业微信返回信息，更改订单状态
* @Author: Mr.Jkx
* @Date: 2019/4/27 18:28
*/
@RequestMapping(value = "/companyReceiptBack")
@ResponseBody
public void companyReceiptBack(HttpServletRequest request) throws Exception {
String xmlStr = NotifyServlet.getWxXml(request);
LOGGER.info("------扫描企业支付二维码回调请求数据{}", xmlStr);
// 解析回调请求参数
Map map2 = WXPayUtil.xmlToMap(xmlStr);
// 根据回调参数操作订单信息
// TODO
}
微信相关工具类
package com.litte.util.wxpay;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
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();
/**
* 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, WXPayConstants.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, WXPayConstants.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, WXPayConstants.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, WXPayConstants.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, WXPayConstants.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, WXPayConstants.SignType 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(WXPayConstants.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 (WXPayConstants.SignType.MD5.equals(signType)) {
return MD5(sb.toString()).toUpperCase();
}
else if (WXPayConstants.SignType.HMACSHA256.equals(signType)) {
return HMACSHA256(sb.toString(), key);
}
else {
throw new Exception(String.format("Invalid sign_type: %s", signType));
}
}
/**
* 获取随机字符串 Nonce Str
*
* @return String 随机字符串
*/
public static String generateNonceStr() {
char[] nonceChars = new char[32];
for (int index = 0; index < nonceChars.length; ++index) {
nonceChars[index] = SYMBOLS.charAt(RANDOM.nextInt(SYMBOLS.length()));
}
return new String(nonceChars);
}
/**
* 生成 MD5
*
* @param data 待处理数据
* @return MD5结果
*/
public static String MD5(String data) throws Exception {
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();
}
/**
* 生成 HMACSHA256
* @param data 待处理数据
* @param key 密钥
* @return 加密结果
* @throws Exception
*/
public static String HMACSHA256(String data, String key) throws Exception {
Mac sha256_HMAC = Mac.getInstance("HmacSHA256");
SecretKeySpec secret_key = new SecretKeySpec(key.getBytes("UTF-8"), "HmacSHA256");
sha256_HMAC.init(secret_key);
byte[] array = sha256_HMAC.doFinal(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();
}
/**
* 日志
* @return
*/
public static Logger getLogger() {
Logger logger = LoggerFactory.getLogger("wxpay java sdk");
return logger;
}
/**
* 获取当前时间戳，单位秒
* @return
*/
public static long getCurrentTimestamp() {
return System.currentTimeMillis()/1000;
}
/**
* 获取当前时间戳，单位毫秒
* @return
*/
public static long getCurrentTimestampMs() {
return System.currentTimeMillis();
}
}
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