package com.sundear.demo.util; import java.io.BufferedReader; import java.io.IOException; import java.io.InputStreamReader; import java.net.DatagramPacket; import java.net.DatagramSocket; import java.net.InetSocketAddress; import java.net.SocketException; /** * 发送端：使用面向对象封装 */ public class TalkSend implements Runnable{ private DatagramSocket client; private BufferedReader reader; private String toIP; private int toPort; public TalkSend(int port,String toIP,int toPort){ this.toIP=toIP; this.toPort =toPort; try{ client = new DatagramSocket(port); reader = new BufferedReader(new InputStreamReader(System.in)); }catch (SocketException e){ e.printStackTrace(); } } @Override public void run() { while(true) { String data; try { data = reader.readLine(); byte[] datas = data.getBytes(); DatagramPacket packet = new DatagramPacket(datas, 0, datas.length, new InetSocketAddress(this.toIP, this.toPort)); client.send(packet); if(data.equals("bye")){ break; } } catch (IOException e) { e.printStackTrace(); } } } }
package com.sundear.demo.util;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.SocketException;
public class TalkReceive implements Runnable{
private DatagramSocket server;
private String from;
public TalkReceive(int port,String from){
this.from= from;
try {
server = new DatagramSocket(port);
} catch (SocketException e) {
e.printStackTrace();
}
}
@Override
public void run() {
byte[] container=new byte[1024*60];
while(true) {
DatagramPacket packet = new DatagramPacket(container, 0, container.length);
try {
server.receive(packet);
byte[] datas = packet.getData();
String string = new String(datas, 0, packet.getLength());
System.out.println(this.from+":"+string);
if(string.equals("bye")){
break;
}
} catch (IOException e) {
e.printStackTrace();
}
}
server.close();
}
}
package com.sundear.demo.util; public class TalkStudent { public static void main(String[] args) { new Thread(new TalkSend(7777,"localhost",9999)).start();//发送 new Thread(new TalkReceive(8888,"老师")).start();//接收 } }
package com.sundear.demo.util;
public class TalkTeacher {
public static void main(String[] args) {
new Thread(new TalkReceive(9999,"学生")).start();//接收
new Thread(new TalkSend(5555,"localhost",8888)).start();
}
}
老师和学生通过控制台一对一聊天
原文：https://www.cnblogs.com/yxj808/p/15005979.html