java 生成缩略图工具包

package com.facelook.util;

import java.awt.Image;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;

import javax.imageio.ImageIO;

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

public class ImageSmall {
	private File fromFile;
	private File toFile = new File("d:\\a");
	private String type;
	public ImageSmall(File fromFile,String type){
		this.fromFile = fromFile;
		this.type = type ;
	}
	
	public File samll() throws FileNotFoundException{
		toFile.deleteOnExit();
		toFile = new File("d:\\a");
		FileOutputStream out = new FileOutputStream(toFile);
		try {
			Image img = ImageIO.read(fromFile);
			BufferedImage tag = new BufferedImage(50, 50, BufferedImage.TYPE_INT_RGB);
			tag.getGraphics().drawImage(img.getScaledInstance(50, 50, Image.SCALE_SMOOTH), 0, 0, null);
			JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out);
            encoder.encode(tag); 
            out.close();  

		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		
		return toFile;
	}

	public File getFromFile() {
		return fromFile;
	}

	public void setFromFile(File fromFile) {
		this.fromFile = fromFile;
	}

	public File getToFile() {
		return toFile;
	}

	public void setToFile(File toFile) {
		this.toFile = toFile;
	}

	public String getType() {
		return type;
	}

	public void setType(String type) {
		this.type = type;
	}
}