发送类
package top.ltyzqhh.Net;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.InetSocketAddress;
public class TalkSend implements Runnable {
DatagramSocket socket = null;
BufferedReader reader = null;
private int fromPort;
private String toIP;
private int toPort;
public TalkSend(int fromPort, String toIP, int toPort) {
this.fromPort = fromPort;
this.toIP = toIP;
this.toPort = toPort;
try {
this.socket = new DatagramSocket(fromPort);
this.reader = new BufferedReader(new InputStreamReader(System.in));
} catch (Exception var5) {
var5.printStackTrace();
}
}
public void run() {
while(true) {
String data = null;
try {
data = this.reader.readLine();
byte[] bytes = data.getBytes();
DatagramPacket packet = new DatagramPacket(bytes, 0, bytes.length, new InetSocketAddress(this.toIP, this.toPort));
this.socket.send(packet);
if (!data.equals("bye")) {
continue;
}
} catch (IOException var4) {
var4.printStackTrace();
continue;
}
this.socket.close();
return;
}
}
}
接收类
package top.ltyzqhh.Net;
import java.io.IOException;
import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.SocketException;
public class TalkReceive implements Runnable{
DatagramSocket socket=null;
private int port;
private String msgFrom;
TalkReceive(int port, String msgFrom)
{
this.port=port;
this.msgFrom=msgFrom;
try {
socket =new DatagramSocket(port);
} catch (SocketException e) {
e.printStackTrace();
}
}
@Override
public void run() {
while(true)
{
try {
//准备接收包裹
byte[] container = new byte[1024];
DatagramPacket packet = new DatagramPacket(container,0,container.length);
socket.receive(packet);//阻塞式接受包裹
//断开连接
byte[] data =packet.getData();
String Receivedata = new String(data, 0, data.length);
System.out.println(msgFrom+":"+Receivedata);
if (Receivedata.equals("bye"))
{
break;
}
} catch (IOException e) {
e.printStackTrace();
}
}
socket.close();
}
}
学生
package top.ltyzqhh.Net;
public class TalkStudent {
public static void main(String[] args) {
//开启两个线程
new Thread(new TalkSend(7777,"localhost",9999)).start();
new Thread(new TalkReceive(8888,"老师")).start();
}
}
老师
package top.ltyzqhh.Net;
public class TalkTeacher {
public static void main(String[] args) {
new Thread(new TalkSend(5555,"localhost",8888)).start();
new Thread(new TalkReceive(9999,"学生")).start();
}
}