//发送类
package com.tencent.UDP;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.net.*;
public class TalkSend implements Runnable {
DatagramSocket socket = null;
BufferedReader reader = null;
DatagramPacket packet = 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 {
socket = new DatagramSocket(fromPort);
reader = new BufferedReader(new InputStreamReader(System.in));
} catch (Exception e) {
System.out.println(e.getMessage());
}
}
@Override
public void run() {
while(true) {
try {
String msg = reader.readLine();
System.out.println("我:" + msg);
byte[] data = msg.getBytes();
packet = new DatagramPacket(data , 0 , data.length ,
new InetSocketAddress(toIp , toPort));
socket.send(packet);
//发送完之后再结束
if(msg.equals("bye")) break;
} catch (Exception e) {
System.out.println(e.getMessage());
}
}
socket.close();
}
}
//接收方
package com.tencent.UDP;
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;
public 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 {
byte[] container = new byte[1024];
DatagramPacket packet = new DatagramPacket(container , 0 , container.length);
//阻塞接收
socket.receive(packet);
byte[] res = packet.getData();
String data = new String(res , 0 , res.length);
System.out.println(msgFrom + ":" + data);
if(data.equals("bye")) break;
} catch ( Exception e) {
e.printStackTrace();
}
}
socket.close();
}
}
//教师用户:开启一个发送线程和一个接收线程
package com.tencent.UDP;
public class TalkSender {
public static void main(String[] args) {
new Thread(new TalkSend(7777, "localhost" , 9999)).start();
new Thread(new TalkReceive(8888 , "老师")).start();
System.out.println("--------12312312-------");
}
}
//学生用户:开启一个发送线程和一个接收线程
package com.tencent.UDP;
public class TalkReceiver {
public static void main(String[] args) {
new Thread(new TalkSend(5555, "localhost" , 8888)).start();
new Thread(new TalkReceive(9999 , "学生")).start();
}
}
END 测试：
