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(); } } } }