文件下载报错：No converter for [class org.springframework.core.io.UrlResource] with preset Content-Type 'application/octet-stream']

求助问答
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1 
    @GetMapping(value = "/downloadLabel/{shippingLabelFile}", produces = MediaType.APPLICATION_JSON_VALUE)
    public ResponseEntity<Resource> downloadFile(@PathVariable("shippingLabelFile") String shippingLabelFile) {
       return service.downloadLabel(shippingLabelFile);
    }


    public ResponseEntity<Resource> downloadLabel(String shippingLabelFile) {
        return localFileManager.download(shippingLabelFile);
    }


    public ResponseEntity<Resource> download(  String fileName) {
        try {
            Resource resource=new UrlResource(
                    //拼接下载的文件的原路径
                    Paths.get(filePath +File.separator+fileName).toUri());
            if(resource.exists() && resource.isReadable()){
                return ResponseEntity.ok()
                        .header(HttpHeaders.CONTENT_TYPE, "application/octet-stream")
                        .header(HttpHeaders.CONTENT_DISPOSITION,"attachment;filename=\""+
                                resource.getFilename()+"\"").body(resource);
            }
        } catch (MalformedURLException e) {
            log.debug(e.getMessage());
        }
        return null;
    }

报错

2022-05-10 18:57:25.279  WARN 27532 --- [io-8400-exec-10] .w.s.m.s.DefaultHandlerExceptionResolver : Resolved [org.springframework.http.converter.HttpMessageNotWritableException: No converter for [class org.springframework.core.io.UrlResource] with preset Content-Type 'application/octet-stream']
2 
@RequestMapping(path = "/download", method = RequestMethod.GET)
public ResponseEntity<Resource> download(String param) throws IOException {

    // ...

    InputStreamResource resource = new InputStreamResource(new FileInputStream(file));

    return ResponseEntity.ok()
            .headers(headers)
            .contentLength(file.length())
            .contentType(MediaType.APPLICATION_OCTET_STREAM)
            .body(resource);
}