com.alibaba.fastjson2.JSONException: illegal input， offset 1, char

This error message indicates that there is an error in the input data being parsed by the com.alibaba.fastjson2 library. The error is occurring at offset 1, which suggests that the issue is with the first character of the input data.

Possible causes of this error include:

- Malformed or incomplete input data
- Incorrect data type or format
- Invalid characters in the input data
- Encoding issues

To resolve this error, you may need to review the input data and make sure that it is valid and correctly formatted. You may also need to check the encoding of the input data and ensure that it matches the expected encoding. If the issue persists, you may need to seek further assistance from the com.alibaba.fastjson2 library documentation or support team.