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<form id='submit' name='submit' action='https://openapi.alipay.com/gateway.do?charset=utf-8'
method='POST' style='display:none;'>
<input name='biz_content' value='{"out_trade_no":"be9745f8823e41d1b7e9eb215967132a",
"product_code":"FAST_INSTANT_TRADE_PAY","qrcode_width":0,
"subject":"Apple MacBook Pro 13-inch","total_amount":"3600.00"}'/>
<input name='method' value='alipay.trade.page.pay'/>
<input name='version' value='1.0'/>
<input name='app_id' value='2012120345001234'/>
<input name='format' value='json'/>
<input name='timestamp' value='2019-04-13 13:50:46'/>
<input name='sign_type' value='RSA2'/>
<input name='notify_url' value='http://localhost:15536/Plugins/PaymentAliPay/Notify'/>
<input name='charset' value='utf-8'/>
<input name='return_url' value='http://localhost:15536/Plugins/PaymentAliPay/Return'/>
<input name='sign' value='WER/4cK47oMWVxurs0pI6uugMYXgHztc1WvTJwp9gz1O0+q9MND6Fn1kGoetarAHOm1H9FeQp9b1RFzqxH4ey9T/yP9igDmvY+6ZKVQQD5NC70fMbYrZZkZkckqds6L37moEb/RqX3VbnL+IZFFO/eqNWMwcLLh7x3E3vfOHpFPcujvAfGmYBPT1vPJpjFFrrxMIlcYJvf3rFSmyDYShrsmToR1ZwXOSMU4VqSsP90MbJuwBh2dpO2O8sz601eZCtuVAjUAJAXM7wlwqL0gKgftrQT4X5VX+d/kdBteiUlHgaSUwa9najHiMxTeAlPTtt/hWje3zEmpFIYmLbqj89A=='/>
<input type='submit' style='display:none;'>
</form>
<script>document.forms['submit'].submit();</script>
报错原因 缺少method参数导致的(不是form中的属性method) 排查方案 检查是否有传递method该参数,如是使用服务端sdk的方法进行调用集成的,可修改服务端sdk方法上使用的提交代码,来获取请求链接进行核实,代码方法修改如下示例(以电脑网站接口java语言为例) AlipayTradePagePayResponse response = alipayClient.pageExecute(request,"get"); 注:其他编程语言修改代码生成字符串数据可参考【pageExecute()方法如何生成url形式】说明