引入依赖

        <dependency>
            <groupId>com.github.tobato</groupId>
            <artifactId>fastdfs-client</artifactId>
            <version>1.26.7</version>
        </dependency>

添加配置

fdfs:
  # 连接的超时时间
  connect-timeout: 3000
  # 读取的超时时间
  so-timeout: 3000
  #tracker服务所在的ip地址和端口号
  tracker-list: 10.240.3x.xx2:22122

Controller

@RestController
@RequestMapping("/img")
public class ImgController {

    @Autowired
    private ImgServer imgServer;

    @PostMapping("/push")
    public ResponseData push(@RequestParam("file") MultipartFile file){
        return imgServer.push(file);
    }

}

实现

@Service
@Slf4j
public class ImgServerImpl implements ImgServer {
    @Autowired
    FastFileStorageClient fastFileStorageClient;

    @Override
    public ResponseData<String> push(MultipartFile file) {
        if (file.isEmpty()) {
            return ResponseData.failureResponse(UploadFileCode.UPLOAD_FILE_CODE_1000);
        }
        try {
            log.info("开始上传 {}", file.getOriginalFilename());
            String fileSuffix = file.getOriginalFilename().substring(file.getOriginalFilename().lastIndexOf(".")+1);
            StorePath storePath = fastFileStorageClient.uploadFile(file.getInputStream(), file.getSize(),fileSuffix, null);
            String path = storePath.getFullPath();
            log.info("上传成功");
            return ResponseData.successResponse(path);
        } catch (IOException e) {
            log.error(e.toString(), e);
            return ResponseData.failureResponse(UploadFileCode.UPLOAD_FILE_CODE_1001.getCode(), e.toString());
        }
    }
}

测试