JAVA 实现图片原比例无损压缩

前段时间，客户反应系统上传的图片展示的时候图片太大影响速度，需要压缩图片。

直接上马

    
    private static void doWithPhoto(String path) {
        File file = new File(path);
        if (!file.exists()) {
            return;
        }
        BufferedImage image = null;
        FileOutputStream os = null;
        try {
            image = ImageIO.read(file);
            int width = image.getWidth();
            int height = image.getHeight();
            BufferedImage bfImage = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
            bfImage.getGraphics().drawImage(image.getScaledInstance(width, height, Image.SCALE_SMOOTH), 0, 0, null);
            os = new FileOutputStream(path);
            JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(os);
            encoder.encode(bfImage);
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            if (os != null) {
                try {
                    os.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
    }