UDP实现消息发送
作者:互联网
UDP实现消息发送
- 发送端
package com.caster.IP.lesson03;
import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.InetAddress;
//不需要连接服务器
public class UdpClientDemo01 {
public static void main(String[] args) throws Exception{
//1.建立一个Socket
DatagramSocket socket = new DatagramSocket();
//2.建立包
String msg = "你好";
String msg1 = "为什么收不到字符";
//发送给谁
InetAddress address = InetAddress.getByName("localhost");
int port = 9090;
//数据 长度 ip 端口
DatagramPacket packet1 = new DatagramPacket(msg.getBytes(),0,address,port);
DatagramPacket packet2 = new DatagramPacket(msg1.getBytes(),0,address,port);
//3.发送包
socket.send(packet1);
socket.send(packet2);
//4.关闭流
socket.close();
}
}
- 接收端
package com.caster.IP.lesson03;
import java.net.DatagramPacket;
import java.net.DatagramSocket;
//还是要等待客户端的连接!
public class UdpServerDemo01 {
public static void main(String[] args) throws Exception{
//开放端口
DatagramSocket socket = new DatagramSocket(9090);
//接收数据包
byte[] buffes = new byte[2048];
DatagramPacket packet = new DatagramPacket(buffes, 0, buffes.length);
//阻塞接收
socket.receive(packet);
System.out.println(packet.getAddress().getHostAddress());
System.out.println(new String(packet.getData(),0, packet.getLength()));
System.out.println("--------------");
socket.close();
}
}
标签:DatagramSocket,UDP,DatagramPacket,java,socket,packet,发送,消息,new 来源: https://blog.csdn.net/weixin_44199948/article/details/114641980