Spring Boot REST 서비스에서 파일 다운로드 오류를 수정하는 방법은 무엇입니까?

<code class="java">@RequestMapping(path="/downloadFile",method=RequestMethod.GET)
public  ResponseEntity<InputStreamReader> downloadDocument(...) {
    ...
    return ResponseEntity.ok()...body(i);
}</code>

<code class="java">@RequestMapping(path="/download",method=RequestMethod.GET)
public ResponseEntity<Resource> download(...) {
    ...
    InputStreamResource resource = new InputStreamResource(new FileInputStream(file));
    return ResponseEntity.ok()...body(resource);
}</code>

<code class="java">@RequestMapping(path="/download",method=RequestMethod.GET)
public ResponseEntity<Resource> download(...) {
    ...
    ByteArrayResource resource = new ByteArrayResource(Files.readAllBytes(path));
    return ResponseEntity.ok()...body(resource);
}</code>