微信退款---服务端
微信退款比较容易按照DEMO进行操作。
首先去下载微信安全证书,里面有微信安全证书使用说明:
微信支付API共四份(证书pkcs12格式、证书pem格式、证书密钥pem格式、CA证书),为接口中强制要求时需携带的证书文件。
退款接口只需要使用 证书pkcs12格式(apiclient_cert.p12)
第二:查看微信申请退款接口可以看出退款传参同样需要进行签名验证,以xml的形式传送
代码如下:
/** * * @方法名称:payRefund * @内容摘要: <退款> * @param transaction_id * 微信支付订单号 * @param out_refund_no * 商户退款订单号 * @param total_fee * 总金额 * @param refund_fee * 退款金额 * @param op_user_id * 操作人 * @return String */ public String wxPayRefundRequest(Order order ,String transaction_id) throws Exception{ String strResponse = ""; KeyStore keyStore = KeyStore.getInstance("PKCS12");
// 读取微信安全证书
String file_s = Thread.currentThread().getContextClassLoader().getResource("").toString();
FileInputStream instream = new FileInputStream(new File(file_s.substring(5)+"/com/conf/apiclient_cert.p12")); try { keyStore.load(instream, Constant.mchID.toCharArray()); } finally { instream.close(); } // Trust own CA and all self-signed certs SSLContext sslcontext = SSLContexts.custom() .loadKeyMaterial(keyStore, Constant.mchID.toCharArray()) .build(); // Allow TLSv1 protocol only SSLConnectionSocketFactory sslsf = new SSLConnectionSocketFactory( sslcontext, new String[] { "TLSv1" }, null, SSLConnectionSocketFactory.BROWSER_COMPATIBLE_HOSTNAME_VERIFIER); CloseableHttpClient httpclient = HttpClients.custom() .setSSLSocketFactory(sslsf) .build(); try { //设置访问地址,也可以用GET方式
//退款接口地址:refund_url=https://api.mch.weixin.qq.com/secapi/pay/refund HttpPost httpPost = new HttpPost(Constant.refund_url); Double amount = elandOrder.getOrderAmount().doubleValue(); String oAmount = new TenPayManager().moneyToFen(amount); // oAmount = "1"; String nonce_str = new TenPayManager().createNonceStr(); String stringA = "appid=" + Constant.appID + "&mch_id=" + Constant.mchID + "&nonce_str=" + nonce_str + "&op_user_id=" +Constant.mchID + "&out_refund_no=" + order.getOrderSn().toString() + "&out_trade_no=" + Order.getOrderSn().toString() + "&refund_fee=" + oAmount + "&total_fee=" + oAmount; String stringSignTemp = stringA + "&key=" + Constant.key; System.out.println(stringA); System.out.println(stringSignTemp); // 签名最后全部转为大写 String sign = MD5Weixin.MD5Encode(stringSignTemp).toUpperCase(); System.out.println(sign); StringBuffer xml = new StringBuffer(); xml.append("<xml>"); xml.append("<appid>").append(Constant.appID).append("</appid>"); xml.append("<mch_id>").append(Constant.mchID).append("</mch_id>"); xml.append("<nonce_str>").append(nonce_str).append("</nonce_str>"); xml.append("<op_user_id>").append(Constant.mchID).append("</op_user_id>"); xml.append("<out_refund_no>").append(order.getOrderSn().toString()).append("</out_refund_no>"); xml.append("<out_trade_no>").append(order.getOrderSn().toString()).append("</out_trade_no>"); xml.append("<refund_fee>").append(oAmount).append("</refund_fee>"); xml.append("<total_fee>").append(oAmount).append("</total_fee>"); xml.append("<transaction_id>").append("").append("</transaction_id>"); xml.append("<sign><![CDATA[").append(sign).append("]]></sign>"); xml.append("</xml>"); StringEntity se = new StringEntity(xml.toString()); httpPost.setEntity(se); logger.info("‘’‘’‘’‘’‘’‘’‘’‘’‘’‘’‘’‘’‘’‘’‘’‘’‘’‘’‘’‘’executing request" + httpPost.getRequestLine()); CloseableHttpResponse response = httpclient.execute(httpPost); try { HttpEntity entity = response.getEntity(); logger.info("------------------------------------response.getStatusLine():"+response.getStatusLine()); if (entity != null) { System.out.println("Response content length: " + entity.getContentLength()); BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(entity.getContent())); String text = ""; String retXmlStr = ""; while ((text = bufferedReader.readLine()) != null) { System.out.println(text); retXmlStr = retXmlStr + text; logger.info("‘’‘’‘’‘’‘’-----------------text:"+text); } logger.info("‘’‘’‘’‘’‘’-----------------retXmlStr:"+retXmlStr); if (!"".equals(retXmlStr)) {
//解析xml为MAP Map<String,Object> resultMap = XmlParser.xmlStrParser(retXmlStr); strResponse = resultMap.get("return_code").toString(); logger.info("---weixin Message-code:" + resultMap.get("return_code").toString()); logger.info("---weixin Message:" + resultMap.get("return_msg").toString()); } } EntityUtils.consume(entity); } finally { response.close(); } } finally { httpclient.close(); } return strResponse; }