Custom request Headers using java servlet

As part of my assignment I need to create the custom headers using java servlet.Below is the scenario.
I have a JSP page(Registration.jsp) which consists of some fields. once the user submitted the registration form, the request would be submitted to a servlet(ProcessNewRegistration.java) in which I am getting the form data submitted by the user. In this servlet I need to put the data in request header.I am trying to do this using response.setHeader("RACFID", "givenName "). After this I am trying to access the request headers on other servlet. Below is the code snippet.

public void doPost(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {            
            String givenName = (String)request.getParameter("userName");
            String sn = (String)request.getParameter("fName");
            String ln = (String)request.getParameter("lName");      
            response.setHeader("RACFID", "givenName ");      
                                           PrintWriter out = response.getWriter();
                                           out.println("<form action=./MyApp/getHeaders.java' method='post'>");
            out.println("<BR><input type='submit' name='postData' value='postData'");
            }
//web.xml
<?xml version="1.0" encoding="UTF-8"?>  
<web-app>
<servlet>
    <servlet-name>ProcessNewRegistration</servlet-name>
    <servlet-class>com.nu.insurance.web.ProcessNewRegistration</servlet-class>
  </servlet>             
  <servlet>
    <servlet-name>Getheaders</servlet-name>
    <servlet-class>com.nu.insurance.web.Getheaders</servlet-class>
  </servlet>        
         
 <servlet-mapping>
    <servlet-name>ProcessNewRegistration</servlet-name>
    <url-pattern>/processRequest/*</url-pattern>
  </servlet-mapping>
  <servlet-mapping>
    <servlet-name>Getheaders</servlet-name>
    <url-pattern>/MyApp/Getheaders</url-pattern>
  </servlet-mapping>        
 </web-app>

Please guide me how to put the custom headers using servlets.

Thanks,
Murali