java对图片进行压缩和resize缩放的方法

序

这里展示一下如何对图片进行压缩和resize。分享给大家，具体如下：

压缩

public static boolean compress(String src,String to, float quality) {
    boolean rs = true;

    // Build param
    JPEGEncodeParam param = null;

    // Build encoder
    File destination = new File(to);
    FileOutputStream os = null;
    try {
      BufferedImage image = ImageIO.read(new File(src));
      param = JPEGCodec.getDefaultJPEGEncodeParam(image);
      param.setQuality(quality, false);

      os = FileUtils.openOutputStream(destination);
      JPEGImageEncoder encoder;
      if (param != null) {
 encoder = JPEGCodec.createJPEGEncoder(os, param);
      } else {
 return false;
      }
      encoder.encode(image);
    } catch(Exception e){
      e.printStackTrace();
      rs = false;
    }finally {
      IOUtils.closeQuietly(os);
    }
    return rs;
  }

resize

public static boolean resize(String src,String to,int newWidth,int newHeight) {
    try {
      File srcFile = new File(src);
      File toFile = new File(to);
      BufferedImage img = ImageIO.read(srcFile);
      int w = img.getWidth();
      int h = img.getHeight();
      BufferedImage dimg = new BufferedImage(newWidth, newHeight, img.getType());
      Graphics2D g = dimg.createGraphics();
      g.setRenderingHint(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BILINEAR);
      g.drawImage(img, 0, 0, newWidth, newHeight, 0, 0, w, h, null);
      g.dispose();
      ImageIO.write(dimg, "jpg", toFile);
    } catch (Exception e) {
      e.printStackTrace();
      return false;
    }
    return true;
  }

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持考高分网。