变换图片格式 尺寸

????Image srcImg = ImageIO.read(file);
????BufferedImage buffImg = null;
????buffImg = new BufferedImage(50, 50, BufferedImage.TYPE_INT_RGB);??
????buffImg.getGraphics().drawImage(srcImg.getScaledInstance(50, 50, Image.SCALE_SMOOTH), 0, 0, null);
????ImageIO.write(buffImg, "gif", new File("C:/logs/submit_50x50.gif"));