Antd upload uploads a file. How should the backend write to get the file?

antd upload uploads an image. How should the backend write to get the file?

the backend did not get any requests after the image was uploaded

@ RestController
@ RequestMapping ((AppConstants.ROOT_URL)
public class RefundUploadController extends BaseController {

@Autowired
private RefundUploadService refundUploadService;

@PostMapping(value = "/order/refundUpload", produces = "text/html; charset=UTF-8")
@ResponseBody
public String upload(RefundUploadRequest refundUploadRequest) {
    return refundUploadService.upload(buildRefundUploadRequest(refundUploadRequest));
}

}

Aug.18,2021
MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1b3cdf0-2c32e.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1b3cdf0-2c32e.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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