本文实例为大家分享了Java实现UDP多线程在线咨询，供大家参考，具体内容如下
1.发送的线程
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;//发送线程public class TalkSend implements Runnable { DatagramSocket socket = null; BufferedReader reader = null; private int formPort; //自身端口 private String toIP; //发送到的IP private int toPort; //发送到的端口 public TalkSend(int formPort, String toIP, int toPort) { this.formPort = formPort; this.toIP = toIP; this.toPort = toPort; try { socket = new DatagramSocket(formPort); reader = new BufferedReader(new InputStreamReader(System.in)); //获取控制台输入 } catch (SocketException e) { e.printStackTrace(); } } @Override public void run() { while(true) { try { String data = reader.readLine(); //获取到的数据 byte[] datas = data.getBytes(); //转换为需要的字节数组 //将数据打包成包 DatagramPacket packet = new DatagramPacket(datas,0, datas.length,new InetSocketAddress(this.toIP,this.toPort)); socket.send(packet); //发送包 //退出指令 if(packet.equals("bye")){ break; } } catch (IOException e) { e.printStackTrace(); } } socket.close(); }}
2.接收的线程
import java.io.IOException;import java.net.DatagramPacket;import java.net.DatagramSocket;import java.net.SocketException;//接收线程public class TalkReceive implements Runnable { DatagramSocket socket = null; //与发送端的socket为同一个，实现通信 private int port; private String msgFrom; //标志信息来源 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); socket.receive(packet);//接收数据 byte[] data = packet.getData(); String receiveData = new String(data, 0, data.length); System.out.println(msgFrom+":"+receiveData); if(receiveData.equals("bye")){ break; } } catch (IOException e) { e.printStackTrace(); } } socket.close(); }}
3.模拟学生端
//模拟学生public class TalkStudent { public static void main(String[] args) { new Thread(new TalkSend(7777, "localhost", 9999)).start(); new Thread(new TalkReceive(8888, "老师")).start(); }}
4.模拟老师端
//模拟老师public class TalkTeacher { public static void main(String[] args) { new Thread(new TalkSend(5555, "localhost", 8888)).start(); new Thread(new TalkReceive(9999, "学生")).start(); }}
5.截图
学生端：
老师端：
6.总结
首先创建一个发送线程，里面定义要发送到的IP地址和端口，再创建一个DatagramSocket来进行通信，创建一个BufferReader(new InputStreamReader(System.in))来获取控制台的输入的数据，将获取到的数据打包进行发送。之后创建一个接收线程，里面定义自身的端口即可，再创建一个和发送端一样的DatagramSocket来进行通信，接收数据进行打印输出即可。最后模拟学生端和老师端，创建这两个线程来进行通信。学生发送线程到的端口是老师的接收端口，老师发送的端口是学生的接收端口，这样才能互相通信。
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。
往往为了自己的不能失败，而处心积虑前怕狼后怕虎，
