Java网络通信—UDP

1.总揽

 2.客户端

 使用udp通信，需要三个东西：数据本体、通道、数据包装工具 

        Scanner scanner = new Scanner(System.in);String string = scanner.next();byte[] bytes = string.getBytes();// 数据本体DatagramSocket datagramSocket = new DatagramSocket();// 通道DatagramPacket datagramPacket = new DatagramPacket(bytes, bytes.length, InetAddress.getByName("127.0.0.1"),8888);// 数据包装工具datagramSocket.send(datagramPacket);// 将数据包装过的数据通过通道发送

 3.服务端

            byte[] data = new byte[1024*64];// 数据本体DatagramSocket datagramSocket = new DatagramSocket(8888); // 通道DatagramPacket datagramPacket = new DatagramPacket(data,data.length);// 数据包装datagramSocket.receive(datagramPacket);// 将数据接受到dataString string = new String(data,0,datagramPacket.getLength());System.out.println("receive:"+string);