java基于udp实现键盘录入聊天

发送端

package demo02;

import java.io.IOException;
import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.InetAddress;

import java.util.Scanner;

/*
* 实现UDP发送，键盘输入的形式
* 输入完毕，发送给接收端
*/
public class UDPSend {
public static void main(String[] args) throws IOException {
Scanner sc=new Scanner(System.in);
InetAddress inet=InetAddress.getByName("127.0.0.1");
while(true){
byte[] data=sc.next().getBytes();
DatagramPacket dp=new DatagramPacket(data,data.length,inet,6000);
DatagramSocket ds=new DatagramSocket();
ds.send(dp);
}

//ds.close();

}
}

接收端

package demo01;

import java.io.IOException;
import java.net.DatagramPacket;
import java.net.DatagramSocket;

/*
* 实现UDP接收端
* 永不停歇的接收端
*/
public class UDPReceive {
public static void main(String[] args) throws IOException {
//创建数据包传输对象DatagramSocket 绑定端口号
DatagramSocket ds=new DatagramSocket(6000);
//创建字节数组
byte[] data=new byte[1024];
//创建数据包对象，传递字节数组
while(true){
DatagramPacket dp=new DatagramPacket(data, data.length);
//调用ds对象的方法receive传递数据包
ds.receive(dp);

//获取发送端的IP地址对象
String ip=dp.getAddress().getHostAddress();

//获取发送的端口号
int port=dp.getPort();

//获取接收到的字节数
int length=dp.getLength();
System.out.println(new String(data,0,length)+"...."+ip+":"+port);
}
//ds.close();

}
}