alipay.trade.create+JS调起收银台详解

说明： 
在很多场景中都会需要通过alipay.trade.create接口生成一笔支付订单，然后通过JS唤起收银台支付，例如扫码点菜等。 

需要注意的点： 
交易状态必须以异步通知或查询接口为准，异步通知规则可以参考【请点击】。 

create接口demo： 

AlipayClient alipayClient = new DefaultAlipayClient("https://openapi.alipay.com/gateway.do",                TenAlipayConfig.app_id,TenAlipayConfig.merchant_private_key,"json","GBK",TenAlipayConfig.alipay_public_key,"RSA2");                  AlipayTradeCreateRequest request = new AlipayTradeCreateRequest();        request.setBizContent("{" +        "\"out_trade_no\":\"20180320144630111\"," +        "\"total_amount\":0.01," +        "\"discountable_amount\":0.01," +//可打折金额        "\"subject\":\"测试\"," +        "\"buyer_id\":\"2088712969xxxxxx\"," +        "\"store_id\":\"123456\"," +//外部门店编号,此参数会影响优惠券的核销        "\"timeout_express\":\"90m\"," +                  "\"goods_detail\":[{" +        "\"goods_id\":\"wuhuo1996\"," +//商品编码，此参数会影响单品券的核销        "\"goods_name\":\"ipad\"," +        "\"quantity\":1," +        "\"price\":0.01" +        "}]," +        "\"extend_params\":{"+        "\"sys_service_provider_id\":\"208861191743xxxx\""+//此参数未返佣必填参数，2088开头        "}" +        "}");                  AlipayTradeCreateResponse response;        try {            response = alipayClient.execute(request);            if(response.isSuccess())  System.out.println("调用成功"+response.getBody());            else System.out.println("调用失败"+response.getBody());        } catch (AlipayApiException e) {            e.printStackTrace();        }finally {                      }

唤起收银台demo: 

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