微信支付V2签名错误
REQUEST <xml> <appid>wx409f244b4dec5a42</appid> <body>test</body> <mch_id>1528670651</mch_id> <nonce_str>add1a30ac87aa2db72f57a2375d8fec</nonce_str> <notify_url>https://uat-upc.galaxypay.vn/wechat/ipn</notify_url> <out_trade_no>2408195556878076424728896</out_trade_no> <spbill_create_ip>192.168.1.1</spbill_create_ip> <total_fee>1</total_fee> <trade_type>NATIVE</trade_type> <sign>7AEC03B026F94EA44EA17AC6A5EA31A94B0AD4492001AF9C69104B92354AD958</sign> </xml> RESPONSE <xml><return_code><![CDATA[FAIL]]></return_code> <return_msg><![CDATA[签名错误,请检查后再试]]></return_msg> </xml> 为什么在测试环境是成功的,到了生产环境就失败,有大神可以解答下吗?谢谢!