springboot文件上传之MultipartFile（图片）转base64

今天药忘吃喽~ 2024-04-20 09:21 59阅读 0赞

public ImageIdentificationResult imageIdentification(String api_id, String api_secret, MultipartFile file,
                                                             String group_id)
        {
            logger.info("start to image identification. api_id: {}, api_secret: {}, group_id: {}.", api_id, api_secret,
                group_id);
    
            //需要将file转为base64
            String fileStr = "";
            if (!file.isEmpty())
            {
                BASE64Encoder encoder = new BASE64Encoder();
                // 通过base64来转化图片
                try
                {
                    fileStr = encoder.encode(file.getBytes());
                }
                catch (IOException e)
                {
                    logger.error("encode file catch exception.");
                    ImageIdentificationResult imageIdentificationResult = new ImageIdentificationResult();
                    imageIdentificationResult.setStatus(e.getLocalizedMessage());
                    return imageIdentificationResult;
                }
            }
            else
            {
                logger.error("file is empty.");
                ImageIdentificationResult imageIdentificationResult = new ImageIdentificationResult();
                imageIdentificationResult.setStatus("picture is invalid");
                return imageIdentificationResult;
            }
    
            ImageIdentificationParam imageIdentificationParam = new ImageIdentificationParam();
            imageIdentificationParam.setApi_id(api_id);
            imageIdentificationParam.setApi_secret(api_secret);
            imageIdentificationParam.setFile(fileStr);
            imageIdentificationParam.setGroup_id(group_id);
    
            try
            {
                return this.faceService.imageIdentification(imageIdentificationParam);
            }
            catch (Exception e)
            {
                logger.error("imageIdentification catch exception. cause: ", e);
                ImageIdentificationResult imageIdentificationResult = new ImageIdentificationResult();
                imageIdentificationResult.setStatus(e.getLocalizedMessage());
                return imageIdentificationResult;
            }
        }

需要注意的是，获取到的fileStr中可能会有换行符之类的，需要用replaceAll方法替换掉