java udp client 客户端简易实现



public class Client {
 public static void main(String[] args) {
  try {
   DatagramSocket ds = new DatagramSocket();
   byte[] buf = "login".getBytes();
   DatagramPacket data = new DatagramPacket(buf, buf.length,
     new InetSocketAddress("127.0.0.1", 8888));
   ds.send(data);

   while (true) {
    ByteArrayOutputStream baos = new ByteArrayOutputStream();
    buf = new byte[1024];
    data = new DatagramPacket(buf, buf.length);
    ds.receive(data);
    baos.write(data.getData(), 0, data.getLength());
    System.out.println(new String(baos.toByteArray()));

    buf = baos.toByteArray();
    ds.send(new DatagramPacket(buf, buf.length, data.getSocketAddress()));

   }
  } catch (Exception e) {
   e.printStackTrace();
  }
 }
}