java图片转blob java bmp转jpg

public class PicConver {
public static void main(String[]args) throws IOException{
File file = new File("d:/temp/n14719577.bmp");  
Image img = ImageIO.read(file);  
BufferedImage tag = new BufferedImage(img.getWidth(null), img.getHeight(null),    BufferedImage.TYPE_INT_RGB);  
tag.getGraphics().drawImage(img.getScaledInstance(img.getWidth(null), img.getHeight(null), Image.SCALE_SMOOTH), 0, 0, null);  
FileOutputStream out = new FileOutputStream("d:/temp/bmp2jpg.jpg");  
// JPEGImageEncoder可适用于其他图片类型的转换  
JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out);  
encoder.encode(tag);  
out.close(); 
}
}