1.工具校验签名通过截图：
2.调用参数和签名
<xml><nonce_str>7bc41b6cc0144e3789613d29495d80b7</nonce_str><sign>CC74AEFB42286E4AAC73AB75A8BD4F92DF7B7BDC2B14EEBABAB4B379D424D643</sign><mch_id>1528958901</mch_id><body>IJPay 让支付触手可及-扫码支付模式二</body><notify_url>http://versabot.uniconnector.com/wxPay/payNotify</notify_url><spbill_create_ip>0:0:0:0:0:0:0:1</spbill_create_ip><out_trade_no>e7a8b8b7e1304232a90d8ccf452cdede</out_trade_no><appid>wx22945504a94ed846</appid><total_fee>1</total_fee><trade_type>NATIVE</trade_type><attach>Node.js 版:https://gitee.com/javen205/TNWXX</attach><sign_type>HMAC-SHA256</sign_type></xml>
3.用Postman调用统一支付接口
