DatagramSocket发送数据包

    /**
         * 将生成的数据,发送到对应的服务器的端口上
         * @param msg
         * @return 成功0 失败-1
         */
        public int sendMsgAgent(String msg){
            DatagramSocket datagramSocket = null;
            DatagramPacket datagramPacket = null;
            byte [] buf = msg.getBytes();
            try {
                datagramSocket = new DatagramSocket();
                datagramPacket = new       DatagramPacket(buf,buf.length,InetAddress.getByName(SystemConfig.agentIp),SystemConfig.agentPort);
                datagramSocket.send(datagramPacket);
                return 0;
            } catch (SocketException e) {
                e.printStackTrace();
            } catch (UnknownHostException e) {
                e.printStackTrace();
            } catch (IOException e) {
                e.printStackTrace();
            } finally{

            }
            return -1;
        }