UDP聊天室：循环的发送字

通过while循环，文字一直可以发送

dp.getData()是获取DatagramPacket中存储的数据的字节数组。

发送端：

java">package TseUDP;import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.InetAddress;
import java.net.UnknownHostException;
import java.util.Scanner;public class LoginCelint {//客户端public static void main(String[] args) {System.out.println("我是客户端---------------");//发送信息Scanner scanner = new Scanner(System.in);DatagramPacket dp = null;DatagramSocket ds = null;try {while (true){System.out.print("客户端请输入:");String msg = scanner.nextLine();dp = new DatagramPacket(msg.getBytes(),msg.getBytes().length,InetAddress.getByName("127.0.0.1"),8888);ds = new DatagramSocket();ds.send(dp);//接收byte b[] = new byte[100];dp = new DatagramPacket(b,b.length);ds.receive(dp);String content = new String(dp.getData());System.out.println("服务器说"+content);}} catch (Exception e) {e.printStackTrace();}finally {ds.close();}}
}

接收端：

java">package TseUDP;import java.io.IOException;
import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.SocketAddress;
import java.util.Scanner;public class LoginServer {//服务器public static void main(String[] args) {System.out.println("我是服务端——————————");Scanner scanner = new Scanner(System.in);DatagramPacket dp = null;DatagramSocket ds = null;try {ds = new DatagramSocket(8888);while (true) {byte b[] = new byte[100];dp = new DatagramPacket(b, b.length);//等待接收ds.receive(dp);//拆包String msg = new String(dp.getData());System.out.println("客户端对我说：" + msg);//发送System.out.print("服务器请输入：");String content = scanner.next();//发送地址：获得上个数据包的发送地址SocketAddress sa = dp.getSocketAddress();dp = new DatagramPacket(content.getBytes(),content.getBytes().length,sa);ds.send(dp);}} catch (Exception e) {e.printStackTrace();}finally {ds.close();}}
}