JAVA获取图片的宽、高和大小

本地磁盘文件

        File file = new File("C:\\Users\\root\\Desktop\\test.jpg");
        BufferedImage bufferedImage = ImageIO.read(new FileInputStream(file));
        int height = bufferedImage.getHeight();
        int width = bufferedImage.getWidth();
        long size = file.length() / 1024;
 
        System.out.println(height);
        System.out.println(width);
        System.out.println(size);

Spring中通过表单提交的文件

        MultipartFile multipartFile = [your multipartfile];
        BufferedImage bufferedImage = ImageIO.read(multipartFile.getInputStream());
        int height = bufferedImage.getHeight();
        int width = bufferedImage.getWidth();
        long size = file.getSize() / 1024;
 
        System.out.println(height);
        System.out.println(width);
        System.out.println(size);```