How do i make the file directory 'open-ended' ?

[tangara goh]

I refer to this example :

https://stackabuse.com/uploading-files-with-spring-boot/

@Service
public class FileService {

    @Value("${app.upload.dir:${user.home}}")
    public String uploadDir;

    public void uploadFile(MultipartFile file) {

        try {
            Path copyLocation = Paths
                .get(uploadDir + File.separator + StringUtils.cleanPath(file.getOriginalFilename()));
            Files.copy(file.getInputStream(), copyLocation, StandardCopyOption.REPLACE_EXISTING);
        } catch (Exception e) {
            e.printStackTrace();
            throw new FileStorageException("Could not store file " + file.getOriginalFilename()
                + ". Please try again!");
        }
    }
}

I would like to know if it is ok to follow the StringValidateEncodeUtils and filesource in the example code from :

https://www.programcreek.com/java-api-examples/?code=Unidata%2Ftds%2Ftds-master%2Ftds%2Fsrc%2Fmain%2Fjava%2Fthredds%2Futil%2Ffilesource%2FBasicDescendantFileSource.java#

The files look complicated I wonder if it is an overkill to have that to process the file ?