微信公众号h5页面支付(MWEB)

/**
     * 官微-分期支付接口(h5页面支付)
     *
     * @param request
     * @param response
     */
    @SuppressWarnings("unchecked")
    @ResponseBody
    @RequestMapping(value = "/wxWapPrePayH5", method = RequestMethod.POST)
    public Map wxWapPrePayH5(HttpServletRequest request, HttpServletResponse response) throws ApplicationException {
        logger.info("wxWapPrePay start");
        Map resultMap = new HashMap();
        String number = request.getParameter("number");
        String count = request.getParameter("count");

        // 获取合同分期
        ContDto contDto = contBaseService.getContractByNumber(number);
        if (null == contDto) {
            resultMap.put("success", false);
            resultMap.put("code", "1");
            resultMap.put("body", null);
            resultMap.put("msg", "合同分期不存在");
            return resultMap;
        }

        String price = String.valueOf(contDto.installmentEachAmount);
        int price100 = new BigDecimal(price).multiply(new BigDecimal(100)).intValue();
        if (price100 <= 0) {
            resultMap.put("success", false);
            resultMap.put("code", "2");
            resultMap.put("body", null);
            resultMap.put("msg", "还款金额错误");
            return resultMap;
        }
        // 设置回调地址
        String notify_url = "回调地址";

        //用合同编号+期数+随机时间戳，生成唯一订单号
        String numberCount = number + count + "_" +System.currentTimeMillis();

        SortedMap parameters = new TreeMap();
        parameters.put("appid", ConfigUtil.WAP_APPID);
        parameters.put("mch_id", ConfigUtil.WAP_MCH_ID);
        parameters.put("nonce_str", PayCommonUtil.CreateNoncestr());
        parameters.put("body", "分期账单-还款支付");
        parameters.put("out_trade_no", numberCount); // 订单号
        parameters.put("fee_type", "CNY");
        parameters.put("total_fee", String.valueOf(price100));
        parameters.put("spbill_create_ip", CommonUtil.getIpAddress(request));
        parameters.put("notify_url", notify_url);
        parameters.put("trade_type", "MWEB");
        // openid需要获取
//        String openid = request.getParameter("openid");
//        parameters.put("openid", openid);
        parameters.put("scene_info",
                "{'h5_info':{'type':'Wap','wap_url':'http://www.lizhenauto.com','wap_name':'利真延保'}}");
        // 设置签名
        // parameters.put("referer","http://www.lizhenauto.com");
        logger.info("得到的集合是-----------" + parameters.toString());
        String sign = PayCommonUtil.createWapSign("UTF-8", parameters);
        parameters.put("sign", sign);
        // 封装请求参数结束
        String requestXML = PayCommonUtil.getRequestXml(parameters);
        logger.info("requestXML:" + requestXML);
        // 调用统一下单接口
        String result = PayCommonUtil.httpsRequest(ConfigUtil.UNIFIED_ORDER_URL, "POST", requestXML);
        logger.info("\n" + result);
        String mweb_url = null;
        try {
            /** 统一下单接口返回正常的prepay_id，再按签名规范重新生成签名后，将数据传输给APP。参与签名的字段名为appId，partnerId，prepayId，nonceStr，timeStamp，package。注意：package的值格式为Sign=WXPay **/
            Map map = XMLUtil.doXMLParse(result);
            String resultCode = map.get("result_code");
            if ("FAIL".equals(resultCode)) {
                if ("201 合同编号重复".equals(map.get("err_code_des"))) {
                    resultMap.put("success", false);
                    resultMap.put("code", "201");
                    resultMap.put("body", null);
                    resultMap.put("msg", "合同编号重复");
                    return resultMap;
                }
            }

            logger.info(" map " + map.toString());
            String returnCode = map.get("return_code");
            if (returnCode.equals("SUCCESS") && resultCode.equals("SUCCESS")) {
                mweb_url = map.get("mweb_url");
            } else {
                resultMap.put("success", false);
                resultMap.put("code", "200");// 请求成功
                resultMap.put("body", null);
                resultMap.put("msg", "微信支付失败");
                return resultMap;
            }
            resultMap.put("success", true);
            resultMap.put("code", "200");// 请求成功
            resultMap.put("body", mweb_url);
            resultMap.put("msg", "微信支付成功,等待支付");
        } catch (JDOMException e) {
            resultMap.put("success", false);
            resultMap.put("code", "500");// 请求失败
            resultMap.put("body", null);
            resultMap.put("msg", "微信支付失败,请重试");
            logger.error(e.toString());
        } catch (IOException e) {
            resultMap.put("success", false);
            resultMap.put("code", "500");// 请求失败
            resultMap.put("body", null);
            resultMap.put("msg", "微信支付失败,请重试");
            logger.error(e.toString());
        }
        return resultMap;
    }