Writing to Socket outputStream w/o closing it

I'd like to write some messages to the server. Each time, for the tramsmitting only, I'm closing the outputStream and reopen it when I have to send the next message.

os.write(msgBytes);
os.write("\r\n".getBytes());
os.flush();
os.close();

How Can I keep this Socket's OutputStream, os, open and still be able to send the 开发者_C百科message?

Thanks.

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I am missing something here. If you don't call close, it will not close. For example,

os.write(msgBytes);
os.write("\r\n".getBytes());
os.flush();
// Do something 
os.write("more message");
os.flush();
// When you are finally done
os.close();

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In most protocols, the server accepts som kind of EOF symbol. Send such a symbol instead of closing the stream.

For example, IRC servers interpret "\r\n" as the end of a message. This would be 2 messages on one open OutputStream:

PrintStream printStream = new PrintStream(socket.getOutputStream());
printStream.print("JOIN #channel1\r\n");
printStream.flush( );
printStream.print("JOIN #channel2\r\n");
printStream.flush( );

Also, you should wrap your outputStream with DataOutputStream. This wrapper creates more portable output. Plain OutputStream can cause trouble with certain primitive datatypes if server and client have different computer architectures.

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Wrap the Socket's OutputStream in a PrintWriter and call the PrintWriter's println method.

PrintWriter pw = new PrintWriter(socket.getOutputStream());
....
pw.println(message); // call repeatedly to send messages.
....
pw.close(); // when finished writing to server and want to close conn.

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I have found the problem and it lays on the client's side. On the client, I have used -

count = inputStream.read(buffer)) > -1

That means, the client waits till server's outputStream closed, and then processing the incoming data.