Socket——获取客户端IP

获取客户端IP地址的代码

//获取客户端IP
      InetAddress ia= socket.getInetAddress();
      String ip=ia.getHostAddress();
      System.out.println("此客户端的IP为"+ip);

LoginThread 类

package tcpscoket_obj_29;

import java.io.InputStream;
import java.io.ObjectInputStream;
import java.io.OutputStream;
import java.net.InetAddress;
import java.net.Socket;

//线程类：处理客户请求(接受请求    获取客户端IP      返回响应)
public class LoginThread extends Thread{

  Socket socket=null;
  //通过构造方法完成对Socket的接收
  public LoginThread(Socket socket){
    this.socket=socket;
  }
  //处理客户端请求
  public void run(){
    try{
      //3.通过对象输入流获取用户请求信息(反序列化的过程)
      InputStream is=socket.getInputStream();
      ObjectInputStream ois=new ObjectInputStream(is);
      User user=(User)ois.readObject();
      System.out.println("客户端说："+user.getUsername()+"-"+user.getPassword());
      
      //获取客户端IP
      InetAddress ia= socket.getInetAddress();
      String ip=ia.getHostAddress();
      System.out.println("此客户端的IP为"+ip);
      
      //通过输出流给客户端一个响应
      OutputStream os=socket.getOutputStream();
      String reply="欢迎登录！";
      os.write(reply.getBytes());
      //4.关闭相应的数据流和Socket
      os.close();
      ois.close();
      is.close();
      socket.close();
    }catch (Exception e) {
      // TODO: handle exception
      e.printStackTrace();
    }
  }
  
}