支付宝扫码需要开通特定权限,拼接参数有些许不同,页面上的二维码如果是内嵌的就让H5自己去生成，订单和请求字符串服务端生成：

  Map<String, String> paramMap = new HashMap<String, String>();paramMap.put("service",PayPropertiesUtils.getString("alipay.scanCodePay.service"));paramMap.put("partner",PayPropertiesUtils.getString("alipay.scanCodePay.partner"));paramMap.put("_input_charset",PayPropertiesUtils.getString("alipay.inputCharset"));paramMap.put("notify_url",PayPropertiesUtils.getString("alipay.scanCodePay.notifyUrl"));if(StringUtils.isBlank(payExtendVo.getReturnUrl())) {if(!StringUtils.isBlank(paymentTypeEnum.getReturnUrlPropName())) {paramMap.put("return_url",PayPropertiesUtils.getString(paymentTypeEnum.getReturnUrlPropName()));}} else {paramMap.put("return_url",payExtendVo.getReturnUrl());}paramMap.put("out_trade_no",payExtendVo.getOrderId());paramMap.put("subject", GlobalConstants.PAY_PRODUCT_NAME);paramMap.put("payment_type", PayPropertiesUtils.getString("alipay.scanCodePay.paymentType"));paramMap.put("total_fee", String.valueOf(payExtendVo.getPayAmount()));paramMap.put("seller_id", PayPropertiesUtils.getString("alipay.scanCodePay.partner"));paramMap.put("seller_email", PayPropertiesUtils.getString("alipay.scanCodePay.sellerEmail"));paramMap.put("body", GlobalConstants.PAY_PRODUCT_NAME);//show_url 收银台页面上，商品展示的超链接。可空//paymethod 取值范围： creditPay（信用支付） directPay（余额支付） 如果不设置，默认识别为余额支付。//enable_paymethod 支付渠道 用于控制收银台支付渠道显示，该值的取值范围请参见支付渠道。 可支持多种支付渠道显示，以“^”分隔。可空//anti_phishing_key 防钓鱼时间戳//exter_invoke_ip 防钓鱼保护时必填写//extra_common_param 公用回传参数 可控//token  如果开通了快捷登录产品，则需要填写；如果没有开通，则为空。//need_buyer_realnamed 是否需要买家实名认证 T表示需要买家实名认证； 不传或者传其它值表示不需要买家实名认证。可空//hb_fq_param 花呗分期参数paramMap.put("it_b_pay", PayPropertiesUtils.getString("alipay.scanCodePay.itBPay"));paramMap.put("qr_pay_mode", PayPropertiesUtils.getString("alipay.scanCodePay.qrPayMode"));//商户自定二维码宽度 当qr_pay_mode=4时，该参数生效。if(StringUtils.isNotBlank(payExtendVo.getQrcodeWidth())) {paramMap.put("qrcode_width",payExtendVo.getQrcodeWidth());}paramMap.put("goods_type",PayPropertiesUtils.getString("alipay.scanCodePay.goodsType"));logger.info("alipayScanCodePayService----thridPartyPayCall-----");//去除空值Map<String,String> signMap = AlipayCore.paraAppFilter(paramMap);//生成签名String sign = Signature.buildRequestMysign(signMap,PayPropertiesUtils.getString("alipay.scanCodePay.signType"), PayPropertiesUtils.getString("alipay.scanCodePay.md5Key"));signMap.put("sign",sign);logger.info("alipayScanCodePayService----thridPartyPayCall-----sign="+sign);//获取业务参数串String payReqStr = PayPropertiesUtils.getString("alipay.scanCodePay.requestUrl") + AlipayCore.createLinkString(signMap);logger.info("alipayScanCodePayService----thridPartyPayCall-----payReqStr=" + payReqStr);Map returnMap = new HashMap();returnMap.put("scanCodeUrl",payReqStr);returnMap.put("orderId",payExtendVo.getOrderId());returnMap.put("payAmount",tradeLog.getPayAmount());returnMap.put("income",tradeLog.getIncome());returnMap.put("rewardFanpiao",tradeLog.getRewardFanpiao());returnMap.put("incomeAmount",tradeLog.getIncomeAmount());resultBean.setData(returnMap);//存库

支付宝的回调跟手机端回调差不多：

 String tradeStatus = String.valueOf(thridPartyNotifyVo.getAlipayTradeStatus());try {Map<String, String> checkParamsMap = new HashMap<String,String>();Map requestParams = thridPartyNotifyVo.getAliPayRequestParamsMap();for (Iterator iter = requestParams.keySet().iterator(); iter.hasNext();) {String name = (String) iter.next();String[] values = (String[]) requestParams.get(name);String valueStr = "";for (int i = 0; i < values.length; i++) {valueStr = (i == values.length - 1) ? valueStr + values[i]: valueStr + values[i] + ",";}//乱码解决，这段代码在出现乱码时使用。如果mysign和sign不相等也可以使用这段代码转化//valueStr = new String(valueStr.getBytes("ISO-8859-1"), "gbk");checkParamsMap.put(name, valueStr);}if (AlipayNotify.verify(checkParamsMap,PayPropertiesUtils.getString("alipay.scanCodePay.signType"),PayPropertiesUtils.getString("alipay.scanCodePay.md5Key"))) { //验证响应请求正确if(!"TRADE_FINISHED".equals(tradeStatus) && !"TRADE_SUCCESS".equals(tradeStatus)) { //支付失败resultBean = new ResultBean(ResultCode.PayAlipayNotifyIsPayFail.get_code(),ResultCode.PayAlipayNotifyIsPayFail.getMsg()+";返回误码："+tradeStatus, NOTFIY_EXCEPTION_IS_HANDLER);}} else {resultBean = new ResultBean(ResultCode.UNSUCCESS.get_code(),ResultCode.PayAlipayNotifyIsNotValidUrl.getMsg()+";返回码："+tradeStatus, NOTFIY_EXCEPTION_IS_NOT_HANDLER);}
//更余额

最后别忘了返回支付宝一个success，要不他一直发