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。