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:Hello\s\n", "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：xxx\r\n";//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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