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();
                
    }
}