1 /** 2 * 图片质量压缩 3 * @param file 要压缩的图片文件 4 * @param input 文件输入流 5 * @param quality 压缩质量（0-1） 6 * @author ouyangyaxiong 7 * 2016年2月23日 上午9:10:54 8 * @throws IOException 9 * 10 */ 11 public static void imgCompress(File file, InputStream input, float quality ) throws IOException{ 12 Iterator<ImageWriter> imgWriters = ImageIO.getImageWritersByFormatName("jpg"); 13 ImageWriter imgWriter = imgWriters.next(); 14 ImageWriteParam param = imgWriter.getDefaultWriteParam(); 15 param.setCompressionMode(ImageWriteParam.MODE_EXPLICIT); 16 param.setCompressionQuality(quality); 17 OutputStream output = new FileOutputStream(file);//创建输出流 18 ImageOutputStream imgOutput = ImageIO.createImageOutputStream(output); 19 imgWriter.setOutput(imgOutput); 20 BufferedImage bufferedImg = ImageIO.read(input); 21 IIOImage iioimg = new IIOImage(bufferedImg, null, null); 22 imgWriter.write(null, iioimg, param); 23 output.close(); 24 imgOutput.close(); 25 imgWriter.dispose(); 26 27 }
注意：这里如果压缩透明背景的png图片会出现背景变黑的情况
参考：http://www.tutorialspoint.com/java_dip/image_compression_technique.htm,http://stackoverflow.com/questions/22812325/java-image-compression