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微信支付公的众号支付和扫码支付

来源：程序员人生发布时间：2016-07-07 09:00:55 阅读次数：2944次

公众号支付是手机真个微信公众号H5页面支付，这类支付方式必须是在微信内置阅读器发起。

扫码支付分为模式1和模式2，模式1主要为线下服务，该模式是先扫码，再生成定单，商户先为自己的商品生成2维码连接，然后用户扫码以后决定是不是购买，2维码无过期时间，比如自动售卖机大多采取这类模式；模式2主要为线上电商服务，用户选择商品后生成定单，根据定单生成2维码，然后支付，该2维码为临时2维码。

开发流程

1、授权目录

官方文档说必须是精确目录，实际上是2级或3级目录就能够了，太精确的可能还会出现不辨认的情况。如果是扫码支付模式1还需要设置扫码支付回调URL

微信内网页支付设置栏目入口

2.统1下单

注意传入参数不要为null，尽可能不要是空字符串，如果在没有抛出Exception的情况下支付失败，10有89是参数致使的签名有问题，微信支付的签名规定的特别严格，必须依照微信给的规则来，建议第1次先用demo提供的签名方法，以后可以再修改。这里的appid就是支付所在的公众号的appid，openId是用户对应当前公众号的openId。

1、扫码支付模式2

扫码支付比较简单，可以直接通过url发起，传入统1下单参数，生成扫码支付的url。扫码支付的trade_type为NATIVE。

public void getCodeUrl(@PathVariable(value="tradeNo")String tradeNo, HttpServletRequest request, HttpServletResponse response) throws Exception { //根据定单号获得定单详情 OrderProduceBean order = reservationCarService.getTradebyNo(tradeNo); // 附加数据原样返回 String attach = "attach"; // 总金额以分为单位，不带小数点 String totalFee = TenpayUtil.getMoney(order.getTotalFee().toString()); // 定单生成的机器 IP String spbill_create_ip = IpUtil.getIpAddr(request); // 这里notify_url是支付完成后微信发给该链接信息，可以判断会员是不是支付成功，改变定单状态等。 String notify_url = TenPayConfig.notifyUrl; String trade_type = "NATIVE"; // 商户号 String mch_id = TenPayConfig.partner; // 随机字符串 String nonce_str = TenpayUtil.getNonceStr(); // 商品描写根据情况修改 String body = order.getBody(); // 商户定单号 String out_trade_no = order.getOutTradeNo(); SortedMap<String, String> packageParams = new TreeMap<String, String>(); packageParams.put("appid", TenPayConfig.appid); packageParams.put("mch_id", mch_id); packageParams.put("nonce_str", nonce_str); packageParams.put("body", body); packageParams.put("attach", attach); packageParams.put("out_trade_no", out_trade_no); packageParams.put("total_fee", totalFee); packageParams.put("spbill_create_ip", spbill_create_ip); packageParams.put("notify_url", notify_url); packageParams.put("trade_type", trade_type); RequestHandler reqHandler = new RequestHandler(null, null); reqHandler.init(TenPayConfig.appid, TenPayConfig.appsecret, TenPayConfig.partnerkey); String sign = reqHandler.createSign(packageParams); String xml = "<xml>" + "<appid>" + TenPayConfig.appid + "</appid>" + "<mch_id>" + mch_id + "</mch_id>" + "<nonce_str>" + nonce_str + "</nonce_str>" + "<sign>" + sign + "</sign>" + "<body><![CDATA[" + body + "]]></body>" + "<out_trade_no>" + out_trade_no + "</out_trade_no>" + "<attach>" + attach + "</attach>" + "<total_fee>" + totalFee + "</total_fee>" + "<spbill_create_ip>" + spbill_create_ip + "</spbill_create_ip>" + "<notify_url>" + notify_url + "</notify_url>" + "<trade_type>" + trade_type + "</trade_type>" + "</xml>"; System.out.println(xml); String code_url = ""; String createOrderURL = "https://api.mch.weixin.qq.com/pay/unifiedorder"; code_url = new TenPayCore().getCodeUrl(createOrderURL, xml);//调用统1下单接口 if (code_url == null || code_url.equalsIgnoreCase("")) { logger.debug("****************************trade has closed or no this trade in tencentPay"); response.sendError(404); return; } GenerateQrCodeUtil.encodeQrcode(code_url, response); }

2.公众号支付

公众号支付首先通过H5调起支付api，微信生成定单，然后开发者获得预支付id，最后由用户确认支付。

①H5调起JSAPI。

调起有两种方式，1种是WeixinJSBridge.invoke()，另外一种是最新的微信JSAPI，两种方式都可，官方文档用的第1种，使用第1种方式首先要引入http://res.wx.qq.com/open/js/jweixin⑴.0.0.js。

②获得预支付id

这个api和扫码支付的api差不多，就是trade为JSAPI不1样。

public void TencentPayController(@RequestParam("orderno")String orderno,HttpServletRequest request, HttpServletResponse response) throws IOException { //根据定单号查询定单 OrderProduceBean order=reservationCarService.getTradebyNo(orderno); String appid = TenPayConfig.appid; String openId =order.getOpenId(); // 定单号 String orderId = order.getOutTradeNo(); // 附加数据原样返回 String attach = "attach"; // 总金额以分为单位，不带小数点 String totalFee = TenpayUtil.getMoney(order.getTotalFee().toString()); // 定单生成的机器 IP String spbill_create_ip = IpUtil.getIpAddr(request);; // 这里notify_url是支付完成后微信发给该链接信息，可以判断会员是不是支付成功，改变定单状态等。 String notify_url = TenPayConfig.notifyUrl; String trade_type = "JSAPI"; // ---必须参数 // 商户号 String mch_id = TenPayConfig.partner; // 随机字符串 String nonce_str = TenpayUtil.getNonceStr(); // 商品描写根据情况修改 String body = order.getBody(); // 商户定单号 String out_trade_no = orderId; SortedMap<String, String> packageParams = new TreeMap<String, String>(); packageParams.put("appid", appid); packageParams.put("mch_id", mch_id); packageParams.put("nonce_str", nonce_str); packageParams.put("body", body); packageParams.put("attach", attach); packageParams.put("out_trade_no", out_trade_no); packageParams.put("total_fee", totalFee); packageParams.put("spbill_create_ip", spbill_create_ip); packageParams.put("notify_url", notify_url); packageParams.put("trade_type", trade_type); packageParams.put("openid", openId); RequestHandler reqHandler = new RequestHandler(null, null); reqHandler.init(appid, TenPayConfig.appsecret,TenPayConfig.partnerkey); String sign = reqHandler.createSign(packageParams); String xml = "<xml>" + "<appid>" + appid + "</appid>" + "<mch_id>" + mch_id + "</mch_id>" + "<nonce_str>" + nonce_str + "</nonce_str>" + "<sign>" + sign + "</sign>" + "<body><![CDATA[" + body + "]]></body>" + "<out_trade_no>" + out_trade_no + "</out_trade_no>" + "<attach>" + attach + "</attach>" + "<total_fee>" + totalFee + "</total_fee>" + "<spbill_create_ip>" + spbill_create_ip + "</spbill_create_ip>" + "<notify_url>" + notify_url + "</notify_url>" + "<trade_type>" + trade_type + "</trade_type>" + "<openid>" + openId + "</openid>" + "</xml>"; String prepay_id = ""; String createOrderURL = "https://api.mch.weixin.qq.com/pay/unifiedorder"; prepay_id = new TenPayCore().getPayNo(createOrderURL, xml); logger.debug("********************************************"); logger.debug("prepay_id ：" + prepay_id); //获得prepay_id后，拼接最后要求支付所需要的package SortedMap<String, String> finalpackage = new TreeMap<String, String>(); String timestamp = Sha1Util.getTimeStamp(); String packages = "prepay_id="+prepay_id; finalpackage.put("appId", appid); finalpackage.put("timeStamp", timestamp); finalpackage.put("nonceStr", nonce_str); finalpackage.put("package", packages); finalpackage.put("signType", "MD5"); //要签名 String finalsign = reqHandler.createSign(finalpackage); finalpackage.put("paySign", finalsign); String finaPackage = "\"appId\":\"" + appid + "\",\"timeStamp\":\"" + timestamp + "\",\"nonceStr\":\"" + nonce_str + "\",\"package\":\"" + packages + "\",\"signType\" : \"MD5" + "\",\"paySign\":\"" + finalsign + "\""; logger.debug("********************************************"); logger.debug("V3 jsApi package:" + finaPackage); if(prepay_id.length()>0){ this.callBack(response, request,this.gson.toJson(finalpackage)); return; }else{ this.callBack(response, request,"{\"error\":\"prepay_id is null\"}"); return; } }

3.支付回调

该回调方法的路径就是获得预支付id中的参数notify_url,用来处理支付完成后的业务逻辑，注意1定要检查return_code和result_code是不是都为success，另外1定要给微信返回success信息.

public void notifyPay(HttpServletRequest request, HttpServletResponse response) throws IOException { // 示例报文 String inputLine; String notityXml = ""; String resXml = ""; try { while ((inputLine = request.getReader().readLine()) != null) { notityXml += inputLine; } request.getReader().close(); } catch (Exception e) { e.printStackTrace(); } Map<String, String> m = TenpayUtil.parseXmlToList(notityXml); OrderTenPayBean orderTen = new OrderTenPayBean(); orderTen.setAppid(m.get("appid").toString()); orderTen.setBankType(m.get("bank_type").toString()); orderTen.setCashFee(m.get("cash_fee").toString()); orderTen.setFeeType(m.get("fee_type").toString()); orderTen.setIsSubscribe(m.get("is_subscribe").toString()); orderTen.setMchId(m.get("mch_id").toString()); orderTen.setNonceStr(m.get("nonce_str").toString()); orderTen.setOpenid(m.get("openid").toString()); orderTen.setOutTradeNo(m.get("out_trade_no").toString()); orderTen.setResultCode(m.get("result_code").toString()); orderTen.setReturnCode(m.get("return_code").toString()); orderTen.setSign(m.get("sign").toString()); orderTen.setTimeEnd(m.get("time_end").toString()); orderTen.setTotalFee(m.get("total_fee").toString()); orderTen.setTradeType(m.get("trade_type").toString()); orderTen.setTransactionId(m.get("transaction_id").toString()); if ("SUCCESS".equals(orderTen.getResultCode()) && "SUCCESS".equals(orderTen.getReturnCode())<span style="font-family: Arial, Helvetica, sans-serif;">) { //必须判断</span> //TODO 信息入库，修改定单状态 // 支付成功，必须给微信返回此信息，否则微信会1直调用此回调方法 resXml = "<xml>" + "<return_code><![CDATA[SUCCESS]]></return_code>" + "<return_msg><![CDATA[OK]]></return_msg>" + "</xml> "; } else { resXml = "<xml>" + "<return_code><![CDATA[FAIL]]></return_code>" + "<return_msg><![CDATA[报文为空]]></return_msg>" + "</xml> "; } this.callBack(response, request, resXml); }

4.退款

退款需要把商户证书apiclient_cert.p12放到指定目录下，由于有证书的情况下退款不需要密码，1定要注意业务要求的权限问题

public void refusePay(HttpServletResponse response,HttpServletRequest request,@PathVariable(value="outTradeNo")String outTradeNo) throws Exception { OrderProduceBean tradebyNo = reservationCarService.getTradebyNo(outTradeNo); SortedMap<String, String> parameters = new TreeMap<String, String>(); parameters.put("appid", TenPayConfig.appid); parameters.put("mch_id", TenPayConfig.partner); parameters.put("nonce_str", TenpayUtil.getNonceStr()); parameters.put("out_trade_no", tradebyNo.getOutTradeNo()); parameters.put("out_refund_no", tradebyNo.getOutTradeNo()); // 我们自己设定的退款申请号，束缚为UK parameters.put("total_fee", TenpayUtil.getMoney(tradebyNo.getTotalFee().toString())); // 单位为分 parameters.put("refund_fee", TenpayUtil.getMoney(tradebyNo.getTotalFee().toString())); // 单位为分 parameters.put("op_user_id", TenPayConfig.partner); RequestHandler reqHandler = new RequestHandler(null, null); reqHandler.init(TenPayConfig.appid, TenPayConfig.appsecret, TenPayConfig.partnerkey); String sign = reqHandler.createSign(parameters); parameters.put("sign", sign); String reuqestXml = TenpayUtil.getRequestXml(parameters); KeyStore keyStore = KeyStore.getInstance("PKCS12"); FileInputStream instream = new FileInputStream(new File(Resources.getString("cert_url"))); try { keyStore.load(instream, TenPayConfig.partner.toCharArray()); } finally { instream.close(); } // Trust own CA and all self-signed certs SSLContext sslcontext = SSLContexts.custom() .loadKeyMaterial(keyStore, TenPayConfig.partner.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 { HttpPost httpPost = new HttpPost("https://api.mch.weixin.qq.com/secapi/pay/refund"); System.out.println("executing request" + httpPost.getRequestLine()); StringEntity reqEntity = new StringEntity(reuqestXml); // 设置类型 reqEntity.setContentType("application/x-www-form-urlencoded"); httpPost.setEntity(reqEntity); CloseableHttpResponse reqs = httpclient.execute(httpPost); try { HttpEntity entity = reqs.getEntity(); if (entity != null) { System.out.println("Response content length: " + entity.getContentLength()); BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(entity.getContent())); String returnXml = ""; String text; while ((text = bufferedReader.readLine()) != null) { returnXml += text; } //微信退款返回的参数转换为Map Map<String, String> resultMaP = TenpayUtil.parseXmlToList(returnXml); this.callBack(response, request, resultMaP.toString()); //TODO 信息入库 } EntityUtils.consume(entity); } finally { reqs.close(); } } finally { httpclient.close(); } }

PS：代码仅供参考！

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