UDP实现聊天
发送端
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;
public class UdpSenderDemo01 {
public static void main(String[] args) throws IOException {
DatagramSocket socket=new DatagramSocket(8888);
//准备数据:控制台读取System.in
BufferedReader reader=new BufferedReader(new InputStreamReader(System.in));
while(true){
String data=reader.readLine();
byte[] datas=data.getBytes();
DatagramPacket packet=new DatagramPacket(datas,0,datas.length,new InetSocketAddress("localhost",6666));
socket.send(packet);
if(data.equals("bye")){
break;
}
}
socket.close();
}
}
接收端
import java.io.IOException;
import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.InetSocketAddress;
import java.net.SocketException;
public class UdpReceiveDemo01 {
public static void main(String[] args) throws IOException {
DatagramSocket socket=new DatagramSocket(6666);
while(true){
//准备接收包裹
byte[] container=new byte[1024];
DatagramPacket packet=new DatagramPacket(container,0,container.length);
socket.receive(packet);//阻塞接收包裹
//断开连接 bye
byte[] data=packet.getData();
String receiveData=new String(data,0,data.length);
System.out.println(receiveData);
if(receiveData.equals("bye")){
break;
}
}
socket.close();
}
}