Saving image in applet

Question

i used the following code to save a image it displays from applet.it works fine in appletviewer
BufferedImage expImage = new BufferedImage( (int)this.getWidth(), (int)this.getHeight(), BufferedImage.TYPE_INT_RGB );
Graphics g2d = expImage.getGraphics();
// draftGrid.update(g2d);
this.update(g2d);
g2d.dispose();
OutputStream out = new FileOutputStream( "guru.jpg");
JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out);
encoder.encode(expImage);
out.flush();
out.close();
expImage.flush();
but when i run it in html through my web server the image does' get saved and it the exception i go is
Status code:404 request:R( j
ava/awt/image/BufferedImage.class + null) msg:null
what should i go to save a image from applet throgh browser

Answer 1

Hello,
This is what I am doing through a servlet call.
If you are just going to let the user download the image you could try the following:
// This works if we are just going to download the image as is
URL url = new URL(request.getParameter("imageURL"));
response.setContentType("image/gif");
response.setHeader("Content-Disposition", "attachment; "+
     "filename=\"image.gif\"");
byte buf[] = new byte[1024];
InputStream inputStream = url.openStream();
ServletOutputStream out = response.getOutputStream();
//Read and Write
while(inputStream.read(buf) != -1)
out.write(buf);
out.flush();
out.close();
Or if you are going to manipulate the image a bit before they download it you could try the following:
URL url = new URL(request.getParameter("imageURL"));
response.setContentType("image/gif");
response.setHeader("Content-Disposition", "attachment; "+
     "filename=\"image.gif\"");
// use ImageIcon because we are getting the image from a
// URL which might be slow - it has the MediaTracker built right in
javax.swing.ImageIcon ii = new javax.swing.ImageIcon(url);
Image image = ii.getImage(); // now the pixel data is in memory
// get the height and width of the loaded image
int width = image.getWidth(null);
int height = image.getHeight(null);
// create a rectangle as big as the image
Rectangle drawRect = new Rectangle(10, 10, width, height);
BufferedImage bufImage = new BufferedImage(width,
height, BufferedImage.TYPE_INT_RGB);
// get the graphics so you can draw on it
Graphics2D g = bufImage.createGraphics();
// create a nicce white background for the image
g.setColor(Color.white);
g.fillRect(0, 0, width, height);
// reset the color
g.setColor(Color.black);
// add the image
g.drawImage(image, 0, 0, null);
// add any other things you want as well
g.drawString("Just a string", 10, 10);
// create the output stream
ServletOutputStream out = response.getOutputStream();
JPEGImageEncoder jpegImageEncoder = JPEGCodec.createJPEGEncode(out);
// encode it
jpegImageEncoder.encode(bufImage);
out.flush();
out.close();
Hope that this helps.
Mike