Question

我能够将UDP数据报从我的客户端发送到我的服务器并接收它我无法从服务器向客户端发送数据报。

什么都没发生。我只看到：＆＃34; Hello Server＆＃34;在服务器端，但我不明白：＆＃34; Hello Client＆＃34;在客户端。

    final int PACKETSIZE = 100;

//CLIENT
        byte[] newData = "Hello Server".getBytes();
        DatagramPacket newPacket = new DatagramPacket(newData, newData.length, packet.getAddress(), packet.getPort());

        // Send it
        socket.send(newPacket);

        // Set a receive timeout, 2000 milliseconds
        socket.setSoTimeout(2000);

        // Prepare the packet for receive
        packet.setData(new byte[PACKETSIZE]);

        // Wait for a response from the server
        socket.receive(packet);

        // Print the response
        System.out.println("RECEIVED MESSAGE FROM SERVER: " + new String(packet.getData()));

//SERVER
        int port = Integer.parseInt("1024");
        socket = new DatagramSocket(port);

        System.out.println("SERVER STARTED ON UDP PORT: " + port);


        while (true) {
            // Create a packet
            packet = new DatagramPacket(new byte[PACKETSIZE], PACKETSIZE);

            // Receive a packet (blocking)
            socket.receive(packet);

            // Print the packet sent from the client
            System.out.println(packet.getAddress() + " " + packet.getPort() + ": " + new String(packet.getData()));
            // Create a new packet to send back to the client
            byte[] newData = "Hello Client".getBytes();
            DatagramPacket newPacket = new DatagramPacket(newData, newData.length, packet.getAddress(), packet.getPort());
            // Return the packet to the sender (the client)
            socket.send(newPacket);
        }

Answer 1

搞定了。重复使用相同的数据包。

客户端无法从服务器接收UDP数据报

1 个答案: