How to get asset in directory

My code is like this. That is empty.
Sponge.getAssetManager().getAsset("locale\\" + language + ".conf").get()
I want to know how to get the asset in a dir?

Thx. Ive got it by getResource

I sense a miscommunication. You cannot get an entire directory all at once, nor can you get an asset from a directory on disk. However, you can absolutely utilize subdirectories within your assets folder. Your problem is that you are using backslash as the file separator instead of forward slash. This is a URI, not a file descriptor, so forward slash is always used regardless of target system.

I have tried both of them.
I will test sometime.
Thank you very much.