DOWNLOADING UPLOADED FILES FROM AMAZON S3SERVICE IN A SPRING MVC WEB APP

I have a problem of downloading my uploaded files from amazon s3 service. I have succesfully implemented the upload section, all I need is to download these file to my local hardrive the view them later. My application is a spring mvc application.

This is my controller to call the download service

@Controller
public class fileController{
@Autowired S3Service s3Service;
@Autowired AwsConfig awsConfig;
@Autowired Environment env;
@Autowired DocRepository docRepo;

@RequestMapping(value="downloadDocume")
public void downloadDocument(@RequestParam("docId") Long docId
,HttpServletRequest request ,HttpServletResponse response)){
Document doc = docRepo.findOne(docId);
String docName = doc.getAsset().getName();
 String ASSET_PATH = awsConfig.getBaseUrl()+"/"+
                   awsConfig.getBucket()+"/";

    if (Objects.equals(env.getProperty("spring.profiles.active"),"prod")){
        ASSET_PATH= awsConfig.getBaseUrl()+"/"+
                awsConfig.getBucket()+"/";
    }

   String filtered = StringUtils.delete(docName, ASSET_PATH);
String mimetype = request.getSession().getServletContext().getMimeType(filtered);
    FileStream file = s3Service.getAssetByName("/Documents/", filtered);
    response.setContentType(mimetype);
    response.setContentLength((int) file.getSize());

    response.setHeader("Content-Disposition","attachment; filename=\"" + docName +"\"");
    FileCopyUtils.copy(file.getInputStream(), response.getOutputStream());
 }
}

//This is my S3Sservice class with the download method

 @Service
public class S3Service{
public FileStream getAssetByName(String path , String name)
        throws FileNotFoundException{
    AmazonS3Client s3 = new AmazonS3Client(
            new BasicAWSCredentials(awsConfig.getAccessKey(), awsConfig.getSecretKey()));
    s3.setEndpoint(awsConfig.getBaseUrl());
    s3.setS3ClientOptions(new S3ClientOptions().withPathStyleAccess(true));
    S3Object obj = s3.getObject(new GetObjectRequest(awsConfig.getBucket(), getS3Path(path) + name));
    return new FileStream(obj.getObjectContent(), obj.getObjectMetadata().getContentLength());
}


 }

Please help.