java网络编程 udp
package com.dasenlin.udp;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.UnsupportedEncodingException;
import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.InetSocketAddress;
import java.net.SocketException;
public class Sender {
public static void main(String[] args) throws SocketException, UnsupportedEncodingException {
DatagramSocket socket = new DatagramSocket();
InetSocketAddress address = new InetSocketAddress("127.0.0.1", 1234);
BufferedReader br = new BufferedReader(new InputStreamReader(System.in, "utf-8"));
while(true){
try {
System.out.println("请输入你要发送的信息:");
String content = br.readLine();
if(content.length()==0) break;
byte[]message =content.getBytes();
DatagramPacket packet = new DatagramPacket(message, message.length,address);
socket.send(packet);
} catch (IOException e) {
e.printStackTrace();
}
}
socket.close();
}
}
package com.dasenlin.udp;
import java.io.IOException;
import java.net.DatagramPacket;
import java.net.DatagramSocket;
public class Receiver {
public static void main(String[] args) throws IOException {
DatagramSocket socket = new DatagramSocket(1234);
DatagramPacket packet = new DatagramPacket(new byte[1024], 1024);
while(true){
socket.receive(packet);
byte[]data = packet.getData();
String s = new String(data,0,packet.getLength());
System.out.println("接收到内容:"+s);
if(s.equals("quit")){
break;
}
}
socket.close();
}
}