이미지 썸네일 처리

import java.awt.Image;

import java.awt.Graphics2D;

import java.awt.geom.AffineTransform;

import java.awt.image.BufferedImage;

import java.io.IOException;

import java.io.OutputStream;

import java.io.FileOutputStream;

import javax.swing.ImageIcon;

import com.sun.image.codec.jpeg.JPEGCodec;

import com.sun.image.codec.jpeg.JPEGImageEncoder;

public class EvinPotoSmall

{

private String orig; // 원본이미지 (패스와 파일명)

private String thumb; // 작게만들 이미지 (패스와 파일명)

private int maxDim; // 사이즈

// 작은 이미지를 만든다.(파일이저장된 실제경로, 새로운이름, 가로사이즈)

public void createThumbnail(String orig, String thumb, int maxDim)

{

try {

// Get the image from a file.

Image inImage = new ImageIcon(

orig).getImage();

// Determine the scale.

double scale = (double)maxDim/(double)inImage.getHeight(null);

if (inImage.getWidth(null) > inImage.getHeight(null)) {

scale = (double)maxDim/(double)inImage.getWidth(null);

}

// Determine size of new image.

//One of them

// should equal maxDim.

int scaledW = (int)(scale*inImage.getWidth(null));

int scaledH = (int)(scale*inImage.getHeight(null));

// Create an image buffer in

//which to paint on.

BufferedImage outImage = new BufferedImage(scaledW, scaledH, BufferedImage.TYPE_INT_RGB);

// Set the scale.

AffineTransform tx = new AffineTransform();

// If the image is smaller than

//the desired image size,

// don't bother scaling.

if (scale < 1.0d) {

tx.scale(scale, scale);

}

// Paint image.

Graphics2D g2d = outImage.createGraphics();

g2d.drawImage(inImage, tx, null);

g2d.dispose();

// JPEG-encode the image

//and write to file.

OutputStream os = new FileOutputStream(thumb);

JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(os);

encoder.encode(outImage);

os.close();

} 

catch (IOException e) {

e.printStackTrace();

}

}

}

======================================================================================================================

EvinPotoSmall small = new EvinPotoSmall();

String imgpath = "C:\\up\\thum\\test.gif";

small.createThumbnail( imgpath, "test_thum.gif ", 120 );

[원문] http://www.okjsp.pe.kr/seq/37037