Mega Code Archive
Get image thumbnail
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/**
* COPYRIGHT. Harry Wu 2010. ALL RIGHTS RESERVED.
* Project: EasyPhoto
* Author: Harry Wu <harrywu304@gmail.com>
* Created On: Jun 28, 2008 5:12:21 PM
*
*/
//package org.shaitu.easyphoto.util;
import java.awt.Image;
import java.awt.image.BufferedImage;
import java.awt.image.ColorModel;
import java.awt.image.IndexColorModel;
import java.awt.image.WritableRaster;
import java.io.File;
import java.util.Iterator;
import java.util.List;
import javax.imageio.IIOImage;
import javax.imageio.ImageIO;
import javax.imageio.ImageTypeSpecifier;
import javax.imageio.ImageWriteParam;
import javax.imageio.ImageWriter;
import javax.imageio.plugins.jpeg.JPEGImageWriteParam;
import javax.imageio.stream.ImageOutputStream;
import javax.swing.ImageIcon;
/**
* userful methods about image
* @author harry
*/
public class ImageUtil {
public final static String JPEG = "jpeg";
public final static String JPG = "jpg";
public final static String BMP = "bmp";
public final static String PNG = "png";
public final static String GIF = "gif";
public final static String TIFF = "tiff";
public final static String TIF = "tif";
/**
* get image thumbnail
* @param imageFile
*/
public static ImageIcon getImageThumbnail(File imageFile, int width, int height){
ImageIcon thumbnail = null;
if (imageFile != null && imageFile.isFile()) {
ImageIcon tmpIcon = new ImageIcon(imageFile.getPath());
if (tmpIcon != null) {
if (tmpIcon.getIconWidth() > width) {
int targetHeight = width/tmpIcon.getIconWidth()*tmpIcon.getIconHeight();
if(targetHeight>height){
targetHeight = height;
} else {
targetHeight = -1;
}
thumbnail = new ImageIcon(tmpIcon.getImage().getScaledInstance(width, targetHeight,Image.SCALE_AREA_AVERAGING));
} else {
thumbnail = tmpIcon;
}
}
}
return thumbnail;
}
}
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