A good memory is better than a bad pen. 3-java generating Thumbnails

E-commerce sites and other systems, there are a large number of pictures, from the loading speed and traffic angle, will use more thumbnails.

1 , create thumbnail source code for pictures

Package com.daily;

Import Java.awt.Container;

Import Java.awt.Graphics2D;

Import Java.awt.Image;

Import Java.awt.MediaTracker;

Import java.awt.RenderingHints;

Import Java.awt.Toolkit;

Import Java.awt.image.BufferedImage;

Import Java.io.BufferedOutputStream;

Import java.io.FileNotFoundException;

Import Java.io.FileOutputStream;

Import java.io.IOException;

Import Com.sun.image.codec.jpeg.JPEGCodec;

Import Com.sun.image.codec.jpeg.JPEGEncodeParam;

Import Com.sun.image.codec.jpeg.JPEGImageEncoder;

/**

 * generate thumbnail images

* @author Fan Fangming

*/

public class Easythumbnail {

Private Voidcreatethumbnail (String filename, int thumbwidth,

intthumbheight, int quality, String outfilename)

Throwsinterruptedexception, FileNotFoundException, IOException {

LoadImage from filename

Image image= Toolkit.getdefaulttoolkit (). getImage (filename);

Mediatrackermediatracker = new Mediatracker (new Container ());

Mediatracker.addimage (image,0);

Mediatracker.waitforid (0);

Determinethumbnail size from WIDTH and HEIGHT

Doublethumbratio = (double) thumbwidth/(double) thumbheight;

Intimagewidth = Image.getwidth (null);

Intimageheight = Image.getheight (null);

Doubleimageratio = (double) imagewidth/(double) imageheight;

if (Thumbratio < Imageratio) {

thumbheight= (int) (thumbwidth/imageratio);

} else {

thumbwidth= (int) (thumbheight * imageratio);

}

Draworiginal image to thumbnail image object and

Scale ITTO the new size On-the-fly

Bufferedimagethumbimage = new BufferedImage (Thumbwidth, Thumbheight,

BUFFEREDIMAGE.TYPE_INT_RGB);

graphics2dgraphics2d = Thumbimage.creategraphics ();

Graphics2d.setrenderinghint (Renderinghints.key_interpolation,

Renderinghints.value_interpolation_bilinear);

Graphics2d.drawimage (image,0, 0, thumbwidth, thumbheight, NULL);

Savethumbnail image to Outfilename

Bufferedoutputstreamout = new Bufferedoutputstream (

Newfileoutputstream (Outfilename));

Jpegimageencoderencoder = Jpegcodec.createjpegencoder (out);

Jpegencodeparamparam = Encoder.getdefaultjpegencodeparam (thumbimage);

Quality =math.max (0, Math.min (quality, 100));

Param.setquality ((float) quality/100.0f, false);

Encoder.setjpegencodeparam (param);

Encoder.encode (Thumbimage);

Out.close ();

}

Public staticvoid Main (string[] args) throws exception{

Long start =system.currenttimemillis ();

Easythumbnailthumbnail = new Easythumbnail ();

Thumbnail.createthumbnail ("D:/ffm83/fx.jpg", 108, [+], "d:/ffm83/fx_thunmbnail.jpg");

Long end =system.currenttimemillis ();

System.out.println (" Generate thumbnails time:" + (End-start) + "( milliseconds)");

}

}

2 , running results

generate thumbnails Time: 107 ( ms)

A good memory is better than a bad pen. 3-java generating Thumbnails