TCP一对一通信

package 二十一章;
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();}}}

package 二十一章;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();}}
}