java - 图像读取大小异常 : I/O error reading PNG header!

Question

这是我的代码:

private Rectangle getImageUriImageSize(String uri) {
        Matcher matcher = dataUriPattern.matcher(uri);
        if (!matcher.find()) return null;
        byte[] bytes = DatatypeConverter.parseBase64Binary(matcher.group(2));
        ByteArrayInputStream inputStream = new ByteArrayInputStream(bytes);
        Rectangle rectangle = null;
        try {
            BufferedImage bufferedImage = ImageIO.read(inputStream);
            if (bufferedImage != null) {
                rectangle = new Rectangle(0, 0, bufferedImage.getWidth(), bufferedImage.getHeight());
            }
        } catch (IOException e) {
            logger.warn("Error occurred when reading base64 Data URI: '{}'", e.getMessage());
        } finally {
            IOUtils.closeQuietly(inputStream);
        }
        return rectangle;
    }

它给出了错误

exception: I/O error reading PNG header!

根据

的建议我改成了这个

https://stackoverflow.com/a/27108892

private Rectangle getImageUriImageSize(String uri) {
    Matcher matcher = dataUriPattern.matcher(uri);
    if (!matcher.find()) return null;
    byte[] bytes = DatatypeConverter.parseBase64Binary(matcher.group(2));

    InputStream in = new ByteArrayInputStream(bytes);


  //  ByteArrayInputStream inputStream = new ByteArrayInputStream(bytes);
    Rectangle rectangle = null;
    try {
        BufferedImage bufferedImage = ImageIO.read(in);
        if (bufferedImage != null) {
            rectangle = new Rectangle(0, 0, bufferedImage.getWidth(), bufferedImage.getHeight());
        }
    } catch (IOException e) {
        logger.warn("Error occurred when reading base64 Data URI: '{}'", e.getMessage());
    } finally {
        IOUtils.closeQuietly(in);
    }
    return rectangle;


}

但是这次我遇到了错误。我使用 docker 并且该容器退出。

那该怎么办？

还有这个

 public Rectangle getImageSize(String currentMerchant, String relativeUrl) {logger.info("getImageSize");
        String imageUrl = getImageUrl(currentMerchant, relativeUrl);
        Rectangle rect = null;
        FileImageInputStream imageInputStream = null;
        try {
            File downloadedImageFile = restTemplate.execute(
                imageUrl,
                HttpMethod.GET,
                null,
                response -> {
                    InputStream inputStream = response.getBody();
                    String fileName = getFileName(relativeUrl);
                    return saveInputStreamAs(inputStream, fileName);
                }
            );

            Iterator<ImageReader> imageReaders = getImageReaders(downloadedImageFile);
            if (!imageReaders.hasNext()) {
                logger.warn("Cannot find any image reader for file {}", downloadedImageFile);
            }
            ImageReader imageReader = imageReaders.next();
            imageInputStream = new FileImageInputStream(downloadedImageFile);
            imageReader.setInput(imageInputStream, true, true);
            rect = new Rectangle(0, 0, imageReader.getWidth(0), imageReader.getHeight(0));
        } catch (HttpStatusCodeException ex) {
            logger.warn("Error getting image resource from url '{}', status: {}, message: {}", imageUrl, ex.getStatusCode(), ex.getResponseBodyAsString());
        } catch (IOException ex) {
            logger.warn("Could not read image by url '{}', exception: {}", imageUrl, ex.getMessage(), ex);
        } finally {
            IOUtils.closeQuietly(imageInputStream);
        }
        return rect;
    }

这里有错误

catch (IOException ex) {
        logger.warn("Could not read image by url '{}', exception: {}", imageUrl, ex.getMessage(), ex);
    }

Answer 1

请检查您传递的文件扩展名。应该是PNG。