压缩并上传图片到阿里云(jfinal)

/**
 * 获取上传文件
 *
 * @param r
 * @Return: com.oreilly.servlet.multipart.FilePart
 */
public static FilePart fileuploads(HttpServletRequest r) {
    boolean flag = false;
    MultipartParser mp;
    try {
        mp = new MultipartParser(r, 52428800, false, false, "UTF-8");
        Part part = null;
        while ((part = mp.readNextPart()) != null) {
            String name = part.getName();
            if (part.isFile()) {
                FilePart filePart = (FilePart) part;
                return filePart;
            }
        }
    } catch (IOException e) {
        e.printStackTrace();
        return null;
    }
    return null;
}

/**
 * 判断图片类型
 *
 * @param ImgType
 * @Return: java.lang.String
 */
public static String judgeImgType(String ImgType) {
    Map<String, String> imgMap = new HashMap<>();
    imgMap.put("images", "gif,jpg,jpeg,png,bmp");
    String imgType = "";
    if (StringUtils.isNotBlank(ImgType)) {
        if (Arrays.<String>asList(imgMap.get("imgaes").split(",")).contains(ImgType)) {
            imgType = ImgType;
        } else {
            imgType = "false:文件格式错误";
        }
    }
    return imgType;
}

/**
 * 压缩图片(没有原图)
 * 默认输出25%质量图片
 *
 * @param image
 * @return
 * @throws IOException
 */
public static InputStream compress(BufferedImage image, String readImageFormat) throws IOException {
    InputStream in = ImageUtils.getInputStream(image, readImageFormat);
    ByteArrayOutputStream os = new ByteArrayOutputStream();
    Thumbnails.of(in).size(image.getWidth(), image.getHeight()).outputQuality(0.25f).toOutputStream(os);
    InputStream is = new ByteArrayInputStream(os.toByteArray());
    in.close();
    os.close();
    return is;
}

#阿里云oos
endPoint = oss-cn-beijing.aliyuncs.com
accessKeyId = LTAI9rV1x0TmtGjq
accessKeySecret = 3QCJw4MhlyZC8zQUATKaLxWZpk4bFY
bucketName = songsiraliyun
urlKey = images/
fileUrlKey = files/

public static String REQHEAD = PropKit.get("reqHead");
public static String ENDPOINT = PropKit.get("endPoint");
public static String ACCESSKEYID = PropKit.get("accessKeyId");
public static String ACCESSKEYSECRET = PropKit.get("accessKeySecret");
public static String BUCKETNAME = PropKit.get("bucketName");
public static String URLKEY = PropKit.get("urlKey");
public static String FILEURLKEY = PropKit.get("fileUrlKey");

/**
 * 上传压缩图片到阿里云
 *
 * @Return: void
 */
public void uploadByAliYun() throws IOException {
    FilePart fileUploads = HttpUtil.fileuploads(getRequest());
    String trimFileName = fileUploads.getFileName().trim();
    String subName = trimFileName.substring(0, trimFileName.lastIndexOf("."));
    String fileType = trimFileName.substring(trimFileName.lastIndexOf("."));
    SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyyMMddHHmmss");
    String realName = "";
    //修改文件名，如果相同就会被覆盖掉
    realName = simpleDateFormat.format(new Date()) + "-" + RandCharsUtils.getRandomString(16) + fileType;
    BufferedImage bufferedImage = ImageIO.read(fileUploads.getInputStream());
　　　　判断文件大小
    if (bufferedImage.getWidth() * bufferedImage.getHeight() <= 104857600) {
        String fileExt = fileUploads.getFileName().substring(fileUploads.getFileName().lastIndexOf(".") + 1).toLowerCase();
        String judgeImgType = ImageUtils.judgeImgType(fileExt);
　　　　　　//判断文件类型
        if (StringUtils.isNotBlank(judgeImgType) && !StringUtils.contains(judgeImgType, "false")) {
　　　　　　　　//开始压缩图片
            InputStream compress = ImageUtils.compress(bufferedImage, judgeImgType);
　　　　　　　　//上传到阿里云
            OSSClient ossClient = new OSSClient(REQHEAD + ENDPOINT, ACCESSKEYID, ACCESSKEYSECRET);
            ossClient.putObject(BUCKETNAME, URLKEY + realName, compress);
            ossClient.shutdown();
            Record record = new Record();
            record.set("url", REQHEAD + BUCKETNAME + '.' + ENDPOINT + '/' + URLKEY + realName);
            renderJson(setResult(record));
        } else {
            Map<String, String> resMap = new HashMap<>(16);
            resMap.put("code", "5000");
            resMap.put("msg", "上传图片失败");
            renderJson(setResult(resMap));
        }
    } else {
        Map<String, String> resMap = new HashMap<>(16);
        resMap.put("code", "5000");
        resMap.put("msg", "上传" + subName + "图片过大");
        renderJson(setResult(resMap));
    }
}

参考文档：
https://blog.csdn.net/distinctive_MAN/article/details/83622757
https://blog.csdn.net/songsir001/article/details/86311137
https://help.aliyun.com/document_detail/84798.html?spm=a2c4g.11186623.6.798.65df39a5DivjqP
https://blog.csdn.net/leimenghongchen1/article/details/52949175