GDAL get vsimem file byte array while using Java binding

Question

i have saved a dataset to PNG file.

file = "/vsimem/output.png"; out_drv.CreateCopy(file, dstile, 0, new String[0]);

then I want to get the file's byte array and save the bytes to a database.

In C++ GDAL，VSIGetMemFileBuffer can convert /vsimem/** file to byte[], but I can not find corresponding method in Java GDAL. What can I do to use it in Java?

Version info: GDAL 3.6.3