判断图片格式/修改图片格式/压缩图片_multifile 判断是图片-CSDN博客

本文链接：https://blog.csdn.net/java_zhulinghai/article/details/121144857

 @Override
    public FileOutput uploadPicture(MultipartFile multipartFile, Integer type) throws IOException {
        InputStream inputStream = multipartFile.getInputStream();
        byte[] imageBytes = FileUtils.readInputStream(inputStream);
        String imageType = FileUtils.getPicType(imageBytes);
        String url = this.buildUploadUrl(type);

        Map<String,Object> map = new HashMap<String,Object>(){{
            put("file", multipartFile);
        }};
        String rs = null;
        File updateFile = null;
        if (0 == type && !"TYPE_JPG".equals(imageType)){
            log.info("正在修改图片格式为JPG");
            updateFile = FileUtils.modifyImageFormat(imageBytes, fileConfigProperties.getTempFilePath() + "modifyImageType.jpg", "jpg");
            map.put("file", updateFile);
        }
        if (0 == type && (updateFile == null) ? FileUtils.checkImagePixel(multipartFile) :  FileUtils.checkImagePixel(updateFile)){
            log.info("正在进行图片压缩");
            //压缩图片指定图片像素点
            File targetFile = new File(fileConfigProperties.getTempFilePath() + "scaleAfterImage.jpg");
            FileUtils.imageScale(multipartFile, targetFile);
            map.put("file", targetFile);
            log.info("压缩后图片大小 -> {}", FileUtils.bytes2kb(targetFile.length()));

            BufferedImage bufferedImage = FileUtils.file2ImageBuffer(targetFile);
            log.info("压缩后图片像素, width -> {}, height -> {}", bufferedImage.getWidth(), bufferedImage.getHeight());
            rs = HttpUtil.postForStringWithFile2(url,map);
        }else{
            log.info("原图上传oss");
            Object file = map.get("file");
            if (file instanceof MultipartFile){
                rs = HttpUtil.postForStringWithFile(url,map);
            }
            if (file instanceof File){
                rs = HttpUtil.postForStringWithFile2(url,map);
            }
        }
        log.info("上传图片返回数据：{}",rs);
        // 异步删除临时文件
        //this.scheduledThreadPool.poolExecutor.schedule(() -> FileUtils.deleteFile(targetFile), 100, TimeUnit.MILLISECONDS);

        return this.buildResponse(rs);
    }