39_网络编程_UDP

import java.net.{DatagramPacket, DatagramSocket, InetAddress}

// 发送端
object sendTest extends App {
  //1. 创建 socket
  private val socket = new DatagramSocket

  //2. 准备数据
  val mes = "我是大王呀"
  private val bytes = mes.getBytes
  private val address: InetAddress = InetAddress.getByName("127.0.0.1")
  // 指定数据、ip、端口号
  private val packet = new DatagramPacket(bytes, 0, bytes.length, address, 9090)

  //3. 数据发送
  socket.send(packet)

  //4. 关闭连接
  socket.close
  println("发送完毕")


}

// 接收端
object receiveTest extends App {
  private val address: InetAddress = InetAddress.getByName("127.0.0.1")

  //1. 创建 socket
  private var socket = new DatagramSocket(9090,address)

  //2. 接收 数据
  private val bytes = new Array[Byte](100)
  var packet = new DatagramPacket(bytes, 0, bytes.length)

  socket.receive(packet)

  println(new String(bytes))

  //关闭资源
  socket.close
}