private void generateSignatureBindCardRequest bindCardRequest拼接除了对称秘钥之外的其他字段并按照ASCII码从小到大排序使用键值对的形式拼接成string1StringBuilder sb = new StringBuilder;String and = &;sbappendaccType+=+bindCardRequestgetAcc

This code is a method called "generateSignature" that takes a BindCardRequest object as a parameter. The purpose of this method is to generate a signature for the given BindCardRequest object.

Here is a step-by-step explanation of the code:

1. A StringBuilder object named "sb" is created to store the concatenated string.
2. The method starts appending the values of different fields of the BindCardRequest object to the "sb" StringBuilder object.
3. Each field is appended using the format "fieldName=value&".
4. The fields that are appended include "accType", "appId", "cardNo", "certType", "certifId", "noncestr", "realNm", "registerMobile", "reserveMobile", "timestamp", and "userId".
5. After appending all the fields, the "sb" StringBuilder object is converted to a string named "string1".
6. The "string1" is then signed using an RSA private key obtained from a PFX certificate.
7. The PFX certificate is obtained based on the card bin (first few digits of the card number) and a password.
8. The "string1" is signed using the private key and the resulting signature is encoded using Base64 encoding.
9. The encoded signature is set as the "signature" field of the BindCardRequest object.

If any exception occurs during the signing process, an error message is logged and an AthenaRuntimeException is thrown