class YsfJsapi extends YsfpayPaymentService {

    @Override
    public String preCheck(UnifiedOrderRQ rq, PayOrder payOrder) {
        return null;
    }

    @Override
    public AbstractRS pay(UnifiedOrderRQ rq, PayOrder payOrder, MchAppConfigContext mchAppConfigContext) throws Exception {<FILL_FUNCTION_BODY>}

}

        String logPrefix = "【云闪付(unionpay)jsapi支付】";
        JSONObject reqParams = new JSONObject();
        YsfJsapiOrderRS res = ApiResBuilder.buildSuccess(YsfJsapiOrderRS.class);
        ChannelRetMsg channelRetMsg = new ChannelRetMsg();
        res.setChannelRetMsg(channelRetMsg);

        YsfJsapiOrderRQ bizRQ = (YsfJsapiOrderRQ) rq;

        // 请求参数赋值
        jsapiParamsSet(reqParams, payOrder, getNotifyUrl(), getReturnUrl());
        //云闪付扫一扫支付， 需要传入termInfo参数
        reqParams.put("termInfo", "{\"ip\": \""+StringUtils.defaultIfEmpty(payOrder.getClientIp(), "127.0.0.1")+"\"}");

        //客户端IP
        reqParams.put("customerIp", StringUtils.defaultIfEmpty(payOrder.getClientIp(), "127.0.0.1"));
        // 发送请求并返回订单状态
        JSONObject resJSON = packageParamAndReq("/gateway/api/pay/unifiedorder", reqParams, logPrefix, mchAppConfigContext);
        //请求 & 响应成功， 判断业务逻辑
        String respCode = resJSON.getString("respCode"); //应答码
        String respMsg = resJSON.getString("respMsg"); //应答信息

        try {
            //00-交易成功， 02-用户支付中 , 12-交易重复， 需要发起查询处理    其他认为失败
            if("00".equals(respCode)){
                //付款信息
                res.setPayData(resJSON.getString("payData"));
                channelRetMsg.setChannelState(ChannelRetMsg.ChannelState.WAITING);
            }else{
                channelRetMsg.setChannelState(ChannelRetMsg.ChannelState.CONFIRM_FAIL);
                channelRetMsg.setChannelErrCode(respCode);
                channelRetMsg.setChannelErrMsg(respMsg);
            }
        }catch (Exception e) {
            channelRetMsg.setChannelErrCode(respCode);
            channelRetMsg.setChannelErrMsg(respMsg);
        }
        return res;
    
<methods>public non-sealed void <init>() ,public static void barParamsSet(JSONObject, com.jeequan.jeepay.core.entity.PayOrder) ,public java.lang.String getIfCode() ,public static java.lang.String getYsfpayHost4env(com.jeequan.jeepay.core.model.params.ysf.YsfpayIsvParams) ,public boolean isSupport(java.lang.String) ,public static void jsapiParamsSet(JSONObject, com.jeequan.jeepay.core.entity.PayOrder, java.lang.String, java.lang.String) ,public JSONObject packageParamAndReq(java.lang.String, JSONObject, java.lang.String, com.jeequan.jeepay.pay.model.MchAppConfigContext) throws java.lang.Exception,public com.jeequan.jeepay.pay.rqrs.AbstractRS pay(com.jeequan.jeepay.pay.rqrs.payorder.UnifiedOrderRQ, com.jeequan.jeepay.core.entity.PayOrder, com.jeequan.jeepay.pay.model.MchAppConfigContext) throws java.lang.Exception,public java.lang.String preCheck(com.jeequan.jeepay.pay.rqrs.payorder.UnifiedOrderRQ, com.jeequan.jeepay.core.entity.PayOrder) ,public static void ysfPublicParams(JSONObject, com.jeequan.jeepay.core.entity.PayOrder) <variables>