WxPayConfig payConfig = new WxPayConfig();
payConfig.setMchId(merchantId);
payConfig.setApiV3Key(v3Key);

payConfig.setAppId("wxf2aafca43551b0b5");
payConfig.setCertSerialNo(merchantSerialNumber);
payConfig.setKeyPath(apiclient_cert);
payConfig.setPrivateCertPath(wechatPayCertificatePath);
payConfig.setPrivateKeyPath(privateKeyPath);

WxPayService wxPayService = new WxPayServiceImpl();
wxPayService.setConfig(payConfig);
RedpackService redpackService = wxPayService.getRedpackService();

请求

<xml>

  <mch_id>125***********</mch_id>

  <nonce_str>12332***********</nonce_str>

  <sign>FB2D8A3D1221***********</sign>

  <mch_billno>1000009820***********</mch_billno>

  <send_name>hbfc</send_name>

  <re_openid>oUJ9Y5UDlw***********</re_openid>

  <total_amount>1</total_amount>

  <total_num>1</total_num>

  <wishing>wishing</wishing>

  <act_name>qhb</act_name>

  <remark>remark</remark>

  <notify_way>MINI_PROGRAM_JSAPI</notify_way>

  <wxappid>wxf2aafca43551b0b5</wxappid>

</xml>

响应

返回代码：SUCCESS，返回信息：签名错误，结果代码：FAIL，错误代码：SIGN_ERROR，错误详情：签名错误

appId wxf2aafca43551b0b5