Java 中根据 TCP 协议进行网络通信

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1.服务器端

import java.net.ServerSocket;import java.net.Socket;public class TestStringServer {@SuppressWarnings("resource")public static void main(String[] args) {try {// 1.创建 ServerSocket 类型的对象，并提供端口号ServerSocket ss = new ServerSocket(8888);// 等待客户端的连接请求，使用 accept 方法while (true) {System.out.println("等待客户端连接...");Socket s = ss.accept();System.out.println("客户端" + s.getInetAddress() + "连接成功!");new ServerThread(s).start();}// ss.close();} catch (Exception e) {// TODO: handle exception}}}

2.线程接口内容

import java.io.BufferedReader;import java.io.InputStreamReader;import java.io.PrintStream;import java.net.Socket;import java.text.SimpleDateFormat;import java.util.Date;public class ServerThread extends Thread {private Socket s;public ServerThread(Socket s) {this.s = s;}@Overridepublic void run() {try {BufferedReader br = new BufferedReader(new InputStreamReader(s.getInputStream()));PrintStream ps = new PrintStream(s.getOutputStream());while (true) {String str = br.readLine();if ("bye".equalsIgnoreCase(str)) {System.out.println("客户端" + s.getInetAddress() + "结束连接！");break;}Date d1 = new Date();SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");System.out.println(sdf.format(d1) + " 客户端" + s.getInetAddress() + "说：" + str);//  连接成功发送"I Received!"ps.println("I Received!");System.out.println("成功发送数据！");}// 4.关闭 Socketps.close();br.close();s.close();} catch (Exception e) {e.printStackTrace();}}}

3.客户端内容

import java.io.BufferedReader;import java.io.InputStreamReader;import java.io.PrintStream;import java.net.Socket;public class TestStringClient {public static void main(String[] args) {try {// 1.创建 SocketSocket s = new Socket("192.168.2.1", 8888);// 2.创建输入信息BufferedReader bri = new BufferedReader(new InputStreamReader(System.in));PrintStream ps = new PrintStream(s.getOutputStream());BufferedReader br = new BufferedReader(new InputStreamReader(s.getInputStream()));while (true) {System.out.println("请输入您的信息：");String msg = bri.readLine();// ps.println("hello");ps.println(msg);System.out.println("");if ("bye".equalsIgnoreCase(msg)) {System.out.println("结束对话！");break;}System.out.println("等待对方输入.....");String str = br.readLine();System.out.println("对方输入的信息：" + str);}// 3.关闭 Socketbr.close();ps.close();s.close();} catch (Exception e) {e.printStackTrace();}}}

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