java udp通信

java服务器部分：

public static void main(String[] args)    {        try        {            DatagramSocket server = new DatagramSocket(5050);            byte[] recvBuf = new byte[100];            DatagramPacket recvPacket = new DatagramPacket(recvBuf, recvBuf.length);            server.receive(recvPacket);            String recvStr = new String(recvPacket.getData(), 0, recvPacket.getLength());            System.out.println(recvStr);        }        catch (Exception ex)        {            ex.printStackTrace();        }    }

java客户端部分：

public static void main(String[] args)    {        try        {            DatagramSocket client = new DatagramSocket();            String sendStr = "Hello! I'm Client";            byte[] sendBuf = sendStr.getBytes();            InetAddress addr = InetAddress.getByName("127.0.0.1");            DatagramPacket sendPacket = new DatagramPacket(sendBuf, sendBuf.length, addr, 5050);            client.send(sendPacket);        }        catch (Exception ex)        {            ex.printStackTrace();        }    }

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