How to get client IP address in java Struts2

When users submit a form along with form data we can get the IP address of the client.
Let’s see one simple program to demonstrate this

request.getHeader(“X-FORWARDED-FOR”);

is used to get the address of client in java/jsp/struts and in spring.

   public class Post extends ActionSupport{
           public String execute(){
              HttpServletRequest request = ServletActionContext.getRequest();
              String ipAdd = request.getHeader("X-FORWARDED-FOR");
              if (ipAdd == null) {
                  ipAdd = request.getRemoteAddr();
              }
                System.out.pritln("Ip address of requested client is "+ipAdd); 
               return SUCCESS;
           }
        }

public class Post extends ActionSupport{

public String execute(){

HttpServletRequest request = ServletActionContext.getRequest();

String ipAdd = request.getHeader("X-FORWARDED-FOR");

if (ipAdd == null) {

ipAdd = request.getRemoteAddr();

}

System.out.pritln("Ip address of requested client is "+ipAdd);

return SUCCESS;

}