JAVA UDP接受后端的数据

[「已注销」]

       public static void main(String[] args) throws Exception 
    {   
        Integer port = 8001;
        byte[] buffer = new byte[2048];
        try {
        	InetAddress address = InetAddress.getByName("239.0.0.1");
            DatagramSocket datagramSocket = new DatagramSocket(port,address);
            DatagramPacket datagramPacket = new DatagramPacket(buffer,buffer.length);
            try {  
                    datagramSocket.receive(datagramPacket);   
                    datagramPacket.setLength(datagramPacket.getData().toString().length());   
            } catch (IOException e) {   
                e.printStackTrace();   
            }   
        } catch (SocketException e) {   
            e.printStackTrace();   
        }   
    }   

监听address port ，还要有什么要求么，对后端发送过来的数据格式 有什么要求

[lizhongyi188]