图片等质量压缩

public static String proce1(String oldFile, int width, int height,
      float quality, String smallIcon) {
     if (oldFile == null) {
      return null;
     }
     String newImage = null;
     try {
      /** 对服务器上的临时文件进行处理 */
      Image srcFile = ImageIO.read(new File(oldFile));
      /** 宽,高设定 */
      BufferedImage tag = new BufferedImage(width, height,
        BufferedImage.TYPE_INT_RGB);
      tag.getGraphics().drawImage(srcFile, 0, 0, width, height, null);
      String filePrex = oldFile.substring(0, oldFile.indexOf('.'));
      /** 压缩后的文件名 */
      newImage =filePrex + smallIcon
        + oldFile.substring(filePrex.length());
   
      /** 压缩之后临时存放位置 */
      FileOutputStream out = new FileOutputStream(newImage);
   
      JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out);
      JPEGEncodeParam jep = JPEGCodec.getDefaultJPEGEncodeParam(tag);
      /** 压缩质量 */
      jep.setQuality(quality, true);
      encoder.encode(tag, jep);
     
      out.close();
      srcFile.flush();
     
     } catch (FileNotFoundException e) {
      e.printStackTrace();
     } catch (IOException e) {
      e.printStackTrace();
     }
     return newImage;
    }

 public static void main(String str[])
 {
  piccompression ps=new piccompression();
  try
  {
    System.out.println(proce1("D:/5.jpg",800,600,1,"1"));
    System.out.println(proce1("D:/5.jpg",128,80,1,"2"));
   System.out.print("成功哦");
  }
  catch(Exception e)
  {
   e.printStackTrace();
  }
 }

 

这样就可以了