UDP网络连接操作(3)

                packet2.setData("数据已收到".getBytes()); 
                packet2.setAddress(packet1.getAddress()); 
                packet2.setPort(packet1.getPort()); 
                datagramSocket.send(packet2); 
 
                datagramSocket.close(); 
            } catch (Exception e) { 
                e.printStackTrace(); 
            } 
        } 
    } 
    public static void main(String[] args) { 
        new Server1(); 
    } 
} 
客户端：
Java代码 
package com.sea.client; 
 
import java.net.DatagramPacket; 
import java.net.DatagramSocket; 
import java.net.InetAddress; 
import java.net.SocketException; 
import java.net.UnknownHostException; 
 
public class Client1 { 
    public Client1() { 
        try { 
            DatagramSocket datagramSocket = new DatagramSocket(11111); 
            byte[] msg = new byte[1000]; 
            DatagramPacket datagramPacket = new DatagramPacket(msg, msg.length); 
            datagramPacket.setAddress(InetAddress.getByName("192.168.0.145")); 
            datagramPacket.setPort(12345); 
            datagramPacket.setData("nihao,客户端".getBytes()); 
 
            // 发送数据 
            datagramSocket.send(datagramPacket); 
 
            // 接收数据 
            datagramPacket = new DatagramPacket(msg, msg.length); 
            datagramSocket.receive(datagramPacket);