UDP -- 利用DatagramSocket在网络中传输数据

一、服务端代码

public class Receive {
    
    
    public static void main(String[] args) throws IOException {
    
    
        byte[] bytes = new byte[64];
        // 数据
        DatagramPacket datagramPacket = new DatagramPacket(bytes, bytes.length);
        // 接收器
        DatagramSocket datagramSocket = new DatagramSocket(8888);
        datagramSocket.receive(datagramPacket);
        // 取出数据
        System.out.println("收到的数据："+new String(datagramPacket.getData()));
        System.out.println("发送方信息："+datagramPacket.getAddress().getHostAddress());
        // 关闭收发器
        datagramSocket.close();
    }
}

二、客户端代码

public class Send {
    
    
    public static void main(String[] args) throws IOException {
    
    
        InetAddress address = InetAddress.getByName("127.0.0.1");
        String msg = "hello...";
        // 发送
        DatagramPacket datagramPacket = new DatagramPacket(msg.getBytes(), msg.length(), address, 8888);
        DatagramSocket datagramSocket = new DatagramSocket();
        datagramSocket.send(datagramPacket);
        // 关闭收发器
        datagramSocket.close();
    }
}