Java如何实现简单后台访问并获取IP

后台服务端

import java.io.IOException;import java.io.InputStream;import java.io.OutputStream;import java.io.PrintWriter;import java.net.ServerSocket;import java.net.Socket; public class Server { public static void main(String[] args) throws IOException { ServerSocket s = new ServerSocket(1122);//服务器端口号 Socket ss = s.accept();// 获取IP访问者IP地址 String cip = ss.getInetAddress().getHostAddress();// 接收信息获取访问姓名身份同时向访问者问好 String msg = String.format('%s:Hellosn', 'wo', cip); OutputStream os = ss.getOutputStream(); PrintWriter out = new PrintWriter(os); out.write(msg); out.flush(); System.out.println('有人连线了: ' + cip);// 读取信息 InputStream is = ss.getInputStream(); System.out.println(new String(is.readAllBytes())); System.out.println(ss.isConnected()); os.close(); }}

客户端

import java.io.*;import java.net.Socket;public class Client { public static void main(String[] args) throws IOException { Socket client = new Socket('192.168.1.16', 1122);//服务器端口号1122，IP也可以自定义访问也可以在IP那里输入localhost访问本机 if (client.isConnected()) {// 接收信息 InputStream is = client.getInputStream(); BufferedReader br=new BufferedReader(new InputStreamReader(is)); System.out.println(br.readLine());//向服务器发送个人信息 String msg = '学生：xxxrn';//名字可以定义 OutputStream os = client.getOutputStream(); os.write(msg.getBytes()); os.flush(); System.out.println(client.isConnected()); System.out.println(client.isClosed()); is.close(); os.close(); } }}

后台接收的信息

客户端接收的信息

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