Re: Ploblem doing HTTP POST via URLConnection

Lothar Kimmeringer <>
Tue, 9 Feb 2010 18:30:11 +0100
M?rio wrote:

I am trying to post an object to a servlet via HTTP using the
following code,
but unfortunately, nothing is sent to the server:

    private static void doJavaPost() throws IOException {
        URL url = new URL("http://localhost:9999/myservlet");
        URLConnection connection = url.openConnection();
        ByteArrayOutputStream data = new ByteArrayOutputStream();
        ObjectOutputStream out = new ObjectOutputStream(data);
        out.writeObject(new Date());
        OutputStream os = connection.getOutputStream();

Does someone know why this does not generate a POST request?

Because you don't ask the connection to do that. Call
connection.getInputStream() and the request will be sent.
BTW: You can skip the writing to the ByteArrayOutputStream
and initialized the ObjectOutputStream with
Calling of os.close() isn't needed, either.

Regards, Lothar
Lothar Kimmeringer E-Mail:
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