Images Uploaded in Seam
Apart from not being able to make the accept on file upload work...
(accept ? a comma-separated list of content types to accept, may not be supported
by the browser. E.g. "images/png,images/jpg", "images/*".)
I use this to create a thumbnail for uploded images... (yo can only set one restriction per project for upload file size and elsewhere I want to upload video!)
Anyhow... using this:
/* (non-Javadoc)
* @see nz.co.selwynequestriancentre.action.user.UserDetailsController#processAvatarUpload()
*/
@TransactionAttribute(TransactionAttributeType.NOT_SUPPORTED)
public String processAvatarUpload() {
// Seam does all the work for us...
if (user.getPicture().getName() != null && !user.getPicture().getName().equals("")) {
log.info("Avatar was supplied so adding the Thumbnail for it");
ImageIcon icon = new ImageIcon(user.getPicture().getImage());
user.getPicture().setThumbnail(getRescaledImageAsBytes(user.getPicture().getType(), 70, icon));
}
return "null";
}
@TransactionAttribute(TransactionAttributeType.NOT_SUPPORTED)
private byte[] getRescaledImageAsBytes(String contentType , int width, ImageIcon icon) {
double ratio = (double) width / icon.getIconWidth();
int height = (int) (icon.getIconHeight() * ratio);
int imageType = "image/png".equals(contentType) ? BufferedImage.TYPE_INT_ARGB
: BufferedImage.TYPE_INT_RGB;
BufferedImage bImg = new BufferedImage(width, height, imageType);
Graphics2D g2d = bImg.createGraphics();
g2d.setRenderingHint(RenderingHints.KEY_INTERPOLATION,
RenderingHints.VALUE_INTERPOLATION_BICUBIC);
g2d.drawImage(icon.getImage(), 0, 0, width, height, null);
g2d.dispose();
String formatName = "";
if ("image/png".equalsIgnoreCase(contentType))
formatName = "png";
else if ("image/jpeg".equalsIgnoreCase(contentType))
formatName = "jpeg";
else if ("image/jpg".equalsIgnoreCase(contentType))
formatName = "jpg";
else if ("image/gif".equalsIgnoreCase(contentType))
formatName = "gif";
ByteArrayOutputStream baos = null;
OutputStream out = null;
try {
baos = new ByteArrayOutputStream();
out = new BufferedOutputStream(baos);
try {
ImageIO.write(bImg, formatName, out);
} catch (IOException e) {
e.printStackTrace();
}
} finally { // Try to release any resources.
try {
if (baos != null) {
baos.close();
}
} catch (IOException ignored) {}
try {
if (out != null) {
out.close();
}
} catch (IOException ignored) {}
}
return baos.toByteArray();
}
I get a problem...
1. Images with a transparent background come out with background as black :(
Does anyone have a piece of code I can crib?
