Java file utils Service

fileUtilsService.java

import com.example.dtibackendgradle.NoSQL.repository.FileDcaEtcRepository;
import com.example.dtibackendgradle.NoSQL.util.FileDcaEtc;
import com.example.dtibackendgradle.Sql.model.Documento;
import org.apache.commons.io.FileUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.MediaType;
import org.springframework.stereotype.Service;
import org.springframework.web.multipart.MultipartFile;

import javax.servlet.ServletContext;
import java.io.File;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.*;

@Service
public class FileDcaEtcService {
    @Autowired
    private FileDcaEtcRepository repository;
//TODO: cambiar relativo al server

    public List<String> saveFile(MultipartFile file) throws IOException {
        String upload_folder = "/path/to/folder/";
        File files = new File(upload_folder);
        if (!files.exists()) {
            files.mkdirs();
        }
        List<String> datos = new ArrayList<>();
        if (!file.isEmpty()) {
            byte[] bytes = file.getBytes();
            Path path = Paths.get(upload_folder + "uploaded-" + file.getOriginalFilename());
            System.out.println(path);
            Files.write(path, bytes);
            datos.add(path.toString());
            datos.add(file.getOriginalFilename());
            return datos;
        } else {
            datos.add("no");
            return datos;
        }
    }


    public MediaType getMediaTypeForFileName(ServletContext servletContext, String fileName) {
        // application/pdf
        // application/xml
        // image/gif, ...
        String mineType = servletContext.getMimeType(fileName);
        try {
            MediaType mediaType = MediaType.parseMediaType(mineType);
            return mediaType;
        } catch (Exception e) {
            return MediaType.APPLICATION_OCTET_STREAM;
        }
    }

}