try this
Blob aBlob = rs.getBlob("Photo");
InputStream is = aBlob.getBinaryStream(0, aBlob.length());
BufferedImage imag=ImageIO.read(is);
Image image = imag;
ImageIcon icon =new ImageIcon(image);
lblImage.setIcon(icon);
or
InputStream is = rs.getBinaryStream("photo");
BufferedImage bufImg = null;
bufImg = ImageIO.read(is);
Image image = imag;
ImageIcon icon =new ImageIcon(image);
lblImage.setIcon(icon);