接入支付宝 使用沙箱环境 https://openhome.alipay.com/platform/appDaily.htm?tab=account 配置公钥和私钥、异步回调、同步回调 PC场景支付API https://docs.open.alipay.com/270/alipay.trade.page.pay 签名问题 https://docs.open.alipay.com/291/105974/ 注意回调必须是外网地址，不然支付宝通知不到