TCP通讯

TCP通信

TCP通信方式呢主要的通讯方式是一对一的通讯方式，也有着优点和缺点它的优点对比于UDP来说就是可靠一点因为它的通讯方式是需要先发送消息看看客户端是否能够接收到消息如果没有回复消息的话服务端就不会发出文件等待客户端回复消息，这个握手模式的话就会非常可靠以下代码进行讲解：

客户端代码：

package tcp;import java.io.*;
import java.net.Socket;
import java.util.Scanner;/*** Socket客户端**/
public class SocketClient {public static void main(String[] args) {Socket s = null;try {// 与ip为127.0.0.1、端口为12345的服务端建立连接s = new Socket("127.0.0.1", 12345);// 创建输入流接收服务端发送的消息（字节流）InputStream is = s.getInputStream();// 将服务端返回的字节流转化为字符流InputStreamReader isr = new InputStreamReader(is);// 创建字符流读取缓冲区，方便每行读取BufferedReader br = new BufferedReader(isr);// 创建输出流返回消息OutputStream os = s.getOutputStream();// 创建输出流缓冲PrintWriter pw = new PrintWriter(os);// 创建发送消息的线程Runnable rOut = () -> {boolean flag = true;while (flag) {try {// 接收控制台输入Scanner scan = new Scanner(System.in);String msg = scan.nextLine();// 将输入写入缓冲pw.println(msg);// 将缓冲内的数据推送至服务端并清空缓冲区pw.flush();} catch (Exception e) {flag = false;e.printStackTrace();}}};// 创建接收消息的线程Runnable rIn = () -> {boolean flag = true;while (flag) {try {// 逐行读取服务端返回的消息并打印String str = br.readLine();System.out.println("服务端的消息：" + str);} catch (IOException e) {flag = false;e.printStackTrace();}}};// 启动两个线程Thread tOut = new Thread(rOut);Thread tIn = new Thread(rIn);tOut.start();tIn.start();}catch (IOException e) {try {// 释放资源s.close();} catch (Exception exception) {exception.printStackTrace();}e.printStackTrace();}}
}

服务端代码：

package tcp;
import java.io.*;
import java.net.ServerSocket;
import java.net.Socket;
import java.util.Scanner;/*** Socket服务端**/
public class SocketServer {public static void main(String[] args) {ServerSocket ss = null;Socket s = null;try {// 创建监听端口为12345的Socket服务端ss = new ServerSocket(12345);System.out.println("服务端Socket服务已建立，等待客户端连接...");// 通过ss.accept()开始持续监听12345端口，当有连接时获取收到的包装成Socket的客户端对象s = ss.accept();// 获取客户端的IP地址和端口号String ip = s.getInetAddress().getHostAddress();int port = s.getPort();System.out.println("服务端与 " + ip + ":" + port + " 已建立连接");// 创建输入流接收客户端发送的消息（字节流）InputStream is = s.getInputStream();// 将客户端发送的字节流转化为字符流InputStreamReader isr = new InputStreamReader(is);// 创建字符流读取缓冲区，方便每行读取BufferedReader br = new BufferedReader(isr);// 创建输出流返回消息OutputStream os = s.getOutputStream();// 创建输出流缓冲PrintWriter pw = new PrintWriter(os);// 创建接受信息的线程Runnable rIn = () -> {boolean flag = true;while (flag) {try {// 逐行读取客户端发送的消息并打印String str = br.readLine();System.out.println("客户端的消息：" + str);} catch (IOException e) {flag = false;e.printStackTrace();}}};// 创建发送消息的线程Runnable rOut = () -> {boolean flag = true;while (flag) {try {// 接收控制台输入Scanner scan = new Scanner(System.in);String msg = scan.nextLine();// 将输入写入缓冲pw.println(msg);// 将缓冲内的数据推送至客户端并清空缓冲区pw.flush();} catch (Exception e) {flag = false;e.printStackTrace();}}};// 开启两个线程Thread tIn = new Thread(rIn);Thread tOut = new Thread(rOut);tIn.start();tOut.start();} catch (IOException e) {try {// 释放资源ss.close();s.close();} catch (Exception exception) {exception.printStackTrace();}e.printStackTrace();}}
}