支付宝当面付接口，官方的demo无法正常请求，返回“无效签名” ： 配置报错
十二月 30, 2015 3:47:08 下午 com.alipay.api.internal.util.AlipayLogger logBizError
严重: 2015-12-30 15:47:08^_^{"alipay_trade_refund_response":{"code":"40002","msg":"Invalid Arguments","sub_code":"isv.invalid-signature","sub_msg":"无效签名"},"sign":"aUududgICSy+Wr5NppUHX3FedZeQJCZ+L+xYy7q/TwwXLT5PEkF1PGlbG8hohV0kLZO9iFkWt7mhJeozz5GAp9cqVCnvEdiOT1ausq1EdBXIWF4kPb8C2ssoq6OpgBoHgd+cPbpaekbwbyHxWIHvfZopDUCG+G8aTUxJjLrTVsY="}
com.alipay.api.AlipayApiException: com.alipay.api.AlipayApiException: sign check fail: check Sign and Data Fail!
at com.alipay.api.DefaultAlipayClient._execute(DefaultAlipayClient.java:155)
at com.alipay.api.DefaultAlipayClient.execute(DefaultAlipayClient.java:93)
at com.alipay.api.DefaultAlipayClient.execute(DefaultAlipayClient.java:80)
at com.alipay.f2fpay.ToAlipayBarTradePay.refundOrder(ToAlipayBarTradePay.java:431)
at com.alipay.f2fpay.ToAlipayBarTradePay.main(ToAlipayBarTradePay.java:42)
Caused by: com.alipay.api.AlipayApiException: sign check fail: check Sign and Data Fail!
at com.alipay.api.DefaultAlipayClient._execute(DefaultAlipayClient.java:142)
... 4 more
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