I guess my question would be how to access it? I can't do a straightforward redirection since the file is not accessible via http. In other words, how can I use a servlet to access a file I'd normally access via Windows Explorer using a path of this form:
In that app, I'm using Context.getRequestAsStream to read the files. In your case you would want to use a file reader java.io.FileReader.
One thing to watch for: If your webserver is running as a Windows service, the user under which it is running may not have sufficient permissions to read network files. You'll either need to alter that user's rights or run the service as a different user.