POSTing .JPG from Applet

Question

Hi,
Im trying to post a jpg from java to a php. My question is what would be the best type of stream to do this and also how do I convert my jpg (currently a BufferedImage type) to a format that can be writen to this stream?
Thanks for any pointers, Im struggling to do any more than post a string.
Tomm

Answer 1

ok - thanks very much for your help. Ive kinda got my brain in a twist over the order that buffered streams need to be chained together...
does the stream need to be initialised with the buffer or vice-versa? Im thinking along these lines:
BufferedImage image = ImageIO.read(new File("IMAGE TO PUT"));     
JPGimage = convert_to_jpg(image);   //assuming ive written this :P
String address ="WHERE THE PHP SCRIPT IS";
     //open connection to address
URL dataURL = new URL(address);
URLConnection connection = dataURL.openConnection();
     //set request to a POST of multipart data (eg image)
((HttpURLConnection)connection).setRequestMethod("POST");
connection.setRequestProperty("Content-Type", "multipart/form-data");
     // no caching
connection.setUseCaches(false);
     // allow output
connection.setDoOutput(true);
     // instatiate buffered stream
ByteArrayOutputStream bytearrayoutputstream = new ByteArrayOutputStream();
     // put picture in buffer
bytearrayoutputstream.write(image);
     // set content-length to size of whats in buffer
String length_of_data = String.valueOf(bytearrayoutputstream.size());
connection.setRequestProperty ("Content-Length", length_of_data);
     //close stream to buffer
bytearrayoutputstream.close();
     //open stream to address via connection
OutputStream outputstream = connection.getOutputStream();
     // write content of buffer to outputstream
outputstream.write(bytearrayoutputstream.toByteArray());
outputstream.flush();
outputstream.close();ive found lost of examples of buffered streams but they all seam to chain things differently so its hard to get a grasp on what the common elements are.
Thanks again
Tomm