How do I Access files in Resource sub directory folder?

Question

When files are being saved , It creates a folder in the resource directory with the ID of the customer and save all files for the customer id inside the sub directory in the resource folder . When I try to call the file using its name parameter I get a file not found response but when I removed the file from the sub directory and place it directly in the Resource folder I get the file . The files needed to be stored in a sub directory with an ID . How do I go about it

This is the file upload controller code

@PostMapping(value="/{id}/upload", consumes = {MediaType.MULTIPART_FORM_DATA_VALUE})
     public Customer uploadDocs(@ModelAttribute("customer") Customer customer, 
                                @RequestParam(name="file", required = false) MultipartFile multipartFormfile,
                                @RequestParam(name="file1", required = false) MultipartFile multipartDocfile,
                                @RequestParam(name="file2", required = false) MultipartFile multipartAdditionalfile,
                                @PathVariable Long id) throws java.io.IOException, IOException {
    String formFile = StringUtils.cleanPath(multipartFormfile.getOriginalFilename());
    String docFile = StringUtils.cleanPath(multipartDocfile.getOriginalFilename());
    String additionalImage = StringUtils.cleanPath(multipartAdditionalfile.getOriginalFilename());
    customer.setFormFile(formFile);
    customer.setDocFile(docFile);
    customer.setAdditionalImage(additionalImage);
    customerAccountRepository.save(customer);
    String uploadDir = "customer-photos/" + id; 
    FileUploadUtil.saveFile(uploadDir, formFile, multipartFormfile);
    FileUploadUtil.saveFile(uploadDir, docFile, multipartDocfile);
    FileUploadUtil.saveFile(uploadDir, additionalImage, multipartAdditionalfile);
    return customer;
    }

To call the file , this is the method in the Service Layer

@Service
public class CustomerAccountService {

private Path fileStorageLocation ;
    
     String uploadDir = "customer-photos/" ;
    
    
      public CustomerAccountService() throws Exception { this.fileStorageLocation =
      Paths.get(uploadDir) .toAbsolutePath().normalize();
      
      try { Files.createDirectories(this.fileStorageLocation); } catch (Exception
      ex) { throw new
      Exception("Could not create the directory where the uploaded files will be stored."
      , ex); } }


public Resource loadFileAsResource(String fileName) throws Exception {
    
    Path filePath = fileStorageLocation.resolve(fileName).normalize();
    
    Resource resource = new UrlResource(filePath.toUri());
    
    if(resource.exists()) {
    return resource;
    }else {
    throw new Exception("File not found " + fileName);
    }
    }
 

This is the controller method to get the file using file name

 @GetMapping(value="/files/{fileName:.+}")
     public ResponseEntity<Resource> getFileFromResource(@PathVariable String fileName,
                                        HttpServletRequest request) throws Exception {
     
     Resource resource = customerRepo.loadFileAsResource(fileName);
     
     String contentType = null;
     try {
         contentType = request.getServletContext().getMimeType(resource.getFile().getAbsolutePath());
     } catch (IOException ex) {
         logger.info("Could not determine file type.");
     }
     if(contentType == null) {
         contentType = "application/octet-stream";
     }
     
     return ResponseEntity.ok()
             .contentType(MediaType.parseMediaType(contentType))
        //     .header(HttpHeaders.CONTENT_DISPOSITION, "attachment; filename=\"" + resource.getFilename() + "\"")
             .body(resource);
 
     }