UDP广播

UDP广播发送端：

    public static void main(String[] args) throws IOException {
        DatagramSocket socket = new DatagramSocket();
        String s = "Hello 广播";
        byte[] bytes = s.getBytes();
        InetAddress address = InetAddress.getByName("255.255.255.255");//广播地址，只要是在同一个局域网之内的都会接收到
        DatagramPacket packet = new DatagramPacket(bytes, bytes.length, address, 1025);
        socket.send(packet);
        socket.close();


    }

接收端和单播接收端完全相同不做讲解