Getting file from Controller Spring WEB MVC

FileController.java

    @GetMapping(value = "/{documentId}/content")
    public ResponseEntity<FileSystemResource> downloadContent(@PathVariable("documentId") Long documentId) {
        
        FileSystemResource fileSystemResource = documentService.getContent(documentId);
        
        return ResponseEntity
                .ok()
                .contentType(MediaType.valueOf(documentService.getContentType(documentId)))
                .body(fileSystemResource);
        
        
    }