How to get client Ip Address in Java HttpServletRequest

Question

I am trying to develop a Java web application (Servlet) which I need to get clients IP address.

Following is my code so far:

Answer 1

 import java.net.UnknownHostException;

/**
 * Simple Java program to find IP Address of localhost. This program uses
 * InetAddress from java.net package to find IP address.
 *
 */
public class IPTest { 

public static void main(String args[]) throws UnknownHostException {

    InetAddress addr = InetAddress.getLocalHost();

    //Getting IPAddress of localhost - getHostAddress return IP Address
    // in textual format
    String ipAddress = addr.getHostAddress();

    System.out.println("IP address of localhost from Java Program: " + ipAddress);

    //Hostname
    String hostname = addr.getHostName();
    System.out.println("Name of hostname : " + hostname);     
}
}

Output:

IP address of localhost from Java Program: 190.12.209.123
Name of hostname : PCLOND3433