<xml> <appid>wx2da6d9452424d5e6</appid><device_id>01</device_id><mch_id>1514689771</mch_id><nonce_str>syz012345</nonce_str><now>1641806313</now><rawdata><![CDATA[xR3mXVLtNpR2QaEH2gzeIfOoJl/lOwJU1OyakLnRYY2rIwMFuXQ9ybkLjnY9eDb7EeTvETvWnbltfsmFgeRLD42F/FsIiT7a/WBTEFXqqWjd8SGYe32RUuJOvEsWrEuFAtTEXcfuWB8phJtAgTL5KR12Izjr/wjak1KhA0WlDyHWsRVHZKPFmRBzFsCbbmquk/aWSMI3jZBRi52DFj4CdNBrdUM0J501ZNOLUwU2CvlKWn7L7cBIMHqbjzBNm0h1nuPyfKplX3Sv90z6J0yJv35lHhPXPxhOEJjsli+FoQcfS4QcTQMevo8Wqw8hZRbJxxh62yVPH8UO1KXBnKyV/fPbAhuKh3BNp1YZmqGb6koUpL0=]]></rawdata><sign_type>MD5</sign_type><store_id>0000</store_id><store_name>0000</store_name><sub_mch_id>1617837005</sub_mch_id><version>1</version><sign>F6D6C535EEFB1D882B92EA876490FC05</sign></xml> 2022-01-10 17:18:37 410: <xml><return_code><![CDATA[PARAM_ERROR]]></return_code> <return_msg><![CDATA[请求报文格式错误]]></return_msg> </xml>

https://pay.weixin.qq.com/wiki/doc/wxfacepay/develop/android/payscore.html#%E5%AF%B9%E6%8E%A5%E5%88%B7%E8%84%B8%E6%94%AF%E4%BB%98%E5%88%86 【1.3 获取刷脸支付调用凭证】 接口作用：获取调用凭证 接口地址：https://payapp.weixin.qq.com/face/get_wxpayface_authinfo 后端怎么用java调用呢？这个接口的相关文档在哪里？示例代码在哪里？