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What parameters do you need for java Alipay payment?
Spit it out: Alipay's interface documents are really ugly and messy. I don't know where to find what I want. I also need technical customer service. Thank you for your technical customer service (┬ ┬)

Alipay technical customer service-Hangzhou. Alipay-pub.aliyun-inc.com/demo/AlipaySingleQuery.zip

Pit 1: error code ILLEGAL _ PARTNER _ EXTERFACE, not necessarily because your signature or information is wrong, but also because the interface is unsigned (this is the case in Bian Xiao).

Pit 2: Refund interface

If your website is ok, you can apply for immediate arrival. But for APP, I'm sorry to tell you that there is no interface for APP refund, yes, there is not. . . Alipay needs an independent website for instant payment, and the website needs to have payment-related operations.

Summary: reading documents can't solve the problem. Ask customer service and solve it in the fastest way. Of course, you can also leave a message for Bian Xiao.