java中socket发送数据接收数据(udp)

/*

 *  java socket send and receice demo

 *  @author:luowen

 *  @time:2013-11-1

 * */



import java.net.*;



class SocketSend

{

    public static void main(String[] args)throws Exception

    {

        //创建socket服务

        DatagramSocket ds = new DatagramSocket();



        byte[]  buf = "yes iam demo".getBytes();

        //构造数据包

        DatagramPacket dp = new DatagramPacket(buf,buf.length,InetAddress.getByName("127.0.0.1"),1000);

        //发送数据包

        ds.send(dp);



        ds.close();

    }

}





class SocketRece

{

    public static void main(String[] args)throws Exception

    {



        //创建socket服务 坚挺1000端口

        DatagramSocket ds = new DatagramSocket(1000);



        byte[] by = new byte[1024];

        DatagramPacket dp = new DatagramPacket(by,by.length);

        //接受

        ds.receive(dp);



        String str = "ip:" + dp.getAddress().toString() + "port:" + dp.getPort() + "data:" + new String(dp.getData(),0,dp.getLength());



        System.out.println(str);



        ds.close();

    }

}