链式调用 摘抄于 https://blog.youkuaiyun.com/cainiaobulan/article/details/79078154
// 创建扫码支付请求builder,设置请求参数
AlipayTradePrecreateRequestBuilder builder = new AlipayTradePrecreateRequestBuilder()
.setSubject(subject)//订单主题
.setTotalAmount(totalAmount)//订单总金额,单位为元
.setOutTradeNo(outTradeNo)//
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2020-12-07 15:03:55 ·
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