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我们。
原文链接:https://blog.csdn.net/weixin_49092628/article/details/115837912