Applet Servlet communication

[Sushant Kumar]

how applet can fetch data from servlet which is stored in servlet in a 2D Array.

[Michael Morris]

Hi Sushant,
Welcome to JavaRanch. Write the output on an ObjectOutputStream from the Servlet. Similiar to this:

// From doGet or doPost
ObjectOutputStream ObjOutStream = new ObjectOutputStream(response.getOutputStream());// Form the output streams to write the Array to the applet
// write the array to the stream

Then on the Applet:

URL url = new URL("http://www.myServer.com/ArrayServlet") // Change to the actual location of your Servlet
URLConnection conn = url.openConnection();
// set these parameters to make it as a doPost or doGet method. This shows a doPost
conn.setDoOutput(true);
conn.setDoInput(true);
conn.setUseCaches(false);
conn.setDefaultUseCaches(false);
conn.setRequestProperty("Content-Type","application/x-www-form-urlencoded");
// get the Object Output Stream from connection object
ObjectOutputStream outObj = new ObjectOutputStream(conn.getOutputStream());
// write the request object to the Servlet
outObj.writeObject(request);
outObj.flush();
outObj.close();
// create an Object Input Stream in order to read the 2D Array
ObjectInputStream inObj = new ObjectInputStream(conn.getInputStream());
//read the array from the stream

Note that any objects placed on the stream must implement java.io.Serializable
I'm moving this to the Servlet Forum.
[ February 25, 2004: Message edited by: Michael Morris ]

[Prakash Dwivedi]

Apart from the mechanism mentioned by Michael, you can also use RMI and Socket Connection (if possible) for applet-servlet communication.

[Harro deGouw]

Using custom (raw) sockets requires special permissions, you'd have to sign the applet to get these permissions or change the security settings in the browser.
imho it's generally a better idea to use the first mechanism...