2021-05-25

jishuxiaobai321

于 2021-05-25 14:04:20 发布

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CC 4.0 BY-SA版权

文章标签： java

本文链接：https://blog.youkuaiyun.com/jishuxiaobai321/article/details/117254830

该博客展示了如何使用Java实现UDP通信。发送端通过DatagramSocket在8888端口监听，读取控制台输入并发送到6666端口的localhost。接收端则在6666端口接收数据，并打印出来，当接收到'bye'时结束通信。

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发送端：

public static void main(String[] args)throws Exception {

    DatagramSocket socket =  new DatagramSocket(8888);

    //准备数据；控制台读取System.in
    BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
   while(true) {
       String data = reader.readLine();
       byte[] datas = data.getBytes();
       DatagramPacket packet =   new DatagramPacket(datas,0,datas.length,new InetSocketAddress("localhost",6666));
       socket.send(packet);
       if (data.equals(("bye"))) {
           break;
       }
   }
    socket.close();
   }
接收端：

public static void main(String[] args) throws Exception {
    DatagramSocket socket = new DatagramSocket(6666);
    //准备接受包裹
    while(true) {
        byte[] container = new byte[1024];

        DatagramPacket packet = new DatagramPacket(container,0,container.length);
        socket.receive(packet);
        //断开连接
        byte[] data = packet.getData();
        String receiveData = new String(data,0,data.length);
        System.out.println(receiveData);
        if (receiveData.equals(("bye"))) {
            break;
           }
        }
    socket.close();
    }