spring cloud feign client 上传文件遇到问题记录

项目中用FeignClient上传文件时，发现大小无法大于1M,代码如下：

MultiValueMap<String, String> requestMap = new LinkedMultiValueMap<String, String>();OptUploadFileByteInfoReqDto optUploadFileByteInfoReqDto = new OptUploadFileByteInfoReqDto();optUploadFileByteInfoReqDto.setFileByteArray(file.getBytes());optUploadFileReqDto.setUploadFileByteInfoReqDto(optUploadFileByteInfoReqDto);requestMap.add("file", JSON.toJSONString(optUploadFileReqDto));

// TODO 待修改,增加loginAuthDtoresponse = opcRpcService.uploadFile(file, null);

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@Transactional(rollbackFor = Exception.class)public OptUploadFileRespDto uploadFile(MultiValueMap<String, String> requestMap, LoginAuthDto loginAuthDto) {   Wrapper<OptUploadFileRespDto> response = opcOssFeignApi.uploadFile(requestMap);   log.info("----- 上传文件响应：{}", response);   if (response != null && response.success()) {      OptUploadFileRespDto result = response.getResult();      MdcAttachment mdcAttachment = new MdcAttachment();      mdcAttachment.setAttachmentNo(result.getRefNo());      mdcAttachment.setBucketName(result.getAttachmentPath());      mdcAttachment.setRefNo(result.getRefNo());      mdcAttachment.setName(result.getAttachmentName());      mdcAttachment.setPath(result.getAttachmentUrl());      mdcAttachment.setType(result.getFileType());      mdcAttachment.setFormat(result.getFileType());      // TODO 待修改，去除非空判断      mdcAttachment.setCreator(loginAuthDto != null ? loginAuthDto.getLoginName() : null);      mdcAttachment.setCreatorId(loginAuthDto != null ? loginAuthDto.getAccountId() : null);      mdcAttachment.setCreatedTime(LocalDateTime.now());      mdcAttachment.setUpdateTime(LocalDateTime.now());      mdcAttachmentMapper.insertSelective(mdcAttachment);      result.setAttachmentId(mdcAttachment.getId());      return result;   }   return null;}

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public class OpcAttachmentFeignClient extends BaseController implements OpcOssFeignApi {

 @Resource
    private OpcAttachmentService opcAttachmentService;
    @Resource
    private OpcAliOssService opcAliOssService;

    @Override
    @ApiOperation(httpMethod = "POST", value = "上传文件")
    public Wrapper<OptUploadFileRespDto> uploadFile(MultiValueMap<String, String> requestMap) {
        OptUploadFileReqDto optUploadFileReqDto = JSON.parseObject(requestMap.getFirst("file"),
                OptUploadFileReqDto.class);
        String fileType = optUploadFileReqDto.getFileType();
        String fileName = LocalDateTime.now().format(DateUtil.DATE_FORMAT_30) + RandomUtil.createNumberCode(4) + "."
                + fileType;

        OptUploadFileRespDto optUploadFileRespDto = null;
        try {
            optUploadFileRespDto = opcAliOssService
                    .uploadFile(optUploadFileReqDto.getUploadFileByteInfoReqDto().getFileByteArray(), fileName);
        } catch (IOException e) {
            e.printStackTrace();
            logger.error("上传文件发生异常:{}", e.getMessage());
            return WrapMapper.error("上传文件发生异常");
        }
        if (optUploadFileRespDto != null) {
            optUploadFileRespDto.setFileType(fileType);
        }
        return WrapMapper.ok(optUploadFileRespDto);
    }

当文件>1M时，被调用的uploadFile方法的requestMap就变成空了，原因不明。

于是换了种写法：

    @Transactional(rollbackFor = Exception.class)
    public OptUploadFileRespDto uploadFile(MultipartFile file, LoginAuthDto loginAuthDto) {

        Wrapper<OptUploadFileRespDto> response = opcOssFeignApi.handleFileUpload(file);
        log.info("----- 上传文件响应：{}", response);
        if (response != null && response.success()) {
            OptUploadFileRespDto result = response.getResult();-------------

@Overridepublic Wrapper<OptUploadFileRespDto> handleFileUpload(@RequestPart(value = "file") MultipartFile file) {   String fileType = file.getOriginalFilename().substring(file.getOriginalFilename().lastIndexOf(".") + 1);   String fileName = LocalDateTime.now().format(DateUtil.DATE_FORMAT_30) + RandomUtil.createNumberCode(4) + "."         + fileType;   OptUploadFileRespDto optUploadFileRespDto = null;   try {      optUploadFileRespDto = opcAliOssService            .uploadFile(file.getBytes(), fileName);   } catch (IOException e) {      e.printStackTrace();      logger.error("上传文件发生异常:{}", e.getMessage());      return WrapMapper.error("上传文件发生异常");   }   if (optUploadFileRespDto != null) {      optUploadFileRespDto.setFileType(fileType);   }   return WrapMapper.ok(optUploadFileRespDto);}

问题没了

原文地址：https://www.cnblogs.com/zjhgx/p/12207387.html