[网络协议]六十六、UDP聊天

发送端

package com.g.udp;

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;

import sun.net.InetAddressCachePolicy;

public class Send {

	public static void main(String[] args) throws IOException {
		// TODO Auto-generated method stub
			DatagramSocket socket = new DatagramSocket(9999);
			BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
			
			while (true) {
				String readLine = reader.readLine();
				byte[] bytes = readLine.getBytes();
				DatagramPacket packet = new DatagramPacket(bytes,0, bytes.length,new InetSocketAddress("localhost",6666));
				
				socket.send(packet);
				if (bytes.equals("bye")) {
					break;
				}
			}
			socket.close();
	}

}

**接收端**

package com.g.udp;

import java.io.IOException;
import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.SocketException;

public class Accipt {

	public static void main(String[] args) throws IOException {
		// TODO Auto-generated method stub
			DatagramSocket socket = new DatagramSocket(6666);
			
			byte[] bt = new byte[1024];
			
			while (true) {
				DatagramPacket packet = new DatagramPacket(bt, 0, bt.length);
				socket.receive(packet);
				byte[] data = packet.getData();
				String string = new String(data,0,data.length);
				System.out.println(string);
				if (string.equals("bye")) {
					break;
				}
				
			}
			
			socket.close();
			
	}

}

发送内容

1
2
3
11
22
2
1
11111111111111111
22222
你好
啊啊啊啊啊啊啊啊啊

接收内容
![在这里插入图片描述](https://img-blog.csdnimg.cn/f8fa13fea34d432583c13a29bde3efa9.png)
会覆盖

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