springboot上传下载文件

@RequestMapping(“bigJson”)
@RestController
@Slf4j
public class TestBigJsonController {

@Resource
private BigjsonService bigjsonService;@PostMapping("uploadJsonFile")
public ResponseResult<Long> uploadJsonFile(@RequestParam("file")MultipartFile file){if (file.isEmpty()) {return ResponseResult.error();}try {Bigjson bigjson = new Bigjson();bigjson.setJsonFileName(file.getName());// 解析JSON文件ObjectMapper objectMapper = new ObjectMapper();JSONObject jsonObject = objectMapper.readValue(new InputStreamReader(file.getInputStream(), StandardCharsets.UTF_8), JSONObject.class);bigjson.setJsonFile(jsonObject.toJSONString());//Long id = bigjsonService.uploadJsonFile(bigjson);// 返回成功响应return ResponseResult.success(id);} catch (IOException e) {log.error("上传错误");return ResponseResult.error();}
}@GetMapping("/downloadJson")
public ResponseEntity<byte[]> downloadJson(@RequestParam("id") Long id){Bigjson bigjson = bigjsonService.getById(id);byte[] bytes = bigjson.getJsonFile().getBytes();// 设置响应头HttpHeaders headers = new HttpHeaders();headers.add(HttpHeaders.CONTENT_DISPOSITION, "attachment; filename="+bigjson.getJsonFileName()+".json");headers.add("Cache-Control", "no-cache, no-store, must-revalidate");headers.add("Pragma", "no-cache");headers.add("Expires", "0");// 返回响应return new ResponseEntity<>(bytes, headers, HttpStatus.OK);}

}