Attributes sent from JSP wont show in Servlet

[Tontang Bei]

In my JSP
<%     
   String message = (String) request.getAttribute("message");
   String jobCat=(String)request.getAttribute("paramName");
   String jobs=(String)request.getAttribute("jobs");
   
   request.setAttribute("jobCat",jobCat);
   request.setAttribute("jobs",jobs);  
 
%>    

In my servlet:

 public void doGet(HttpServletRequest request,
                    HttpServletResponse response)
      throws ServletException, IOException {
    
      HttpSession session=request.getSession();
      String jobCat=(String)request.getAttribute("jobCat");
      String jobs=(String)request.getAttribute("jobs");
      System.out.println("jobcat is"+jobCat+"and jobs are"+jobs); <-null   

I get output Null for both Attributes that I set. What am I doing wrong? Ive even tried using hidden form fields in the JSP to send. But still the result is Null in my servlet for some reason. I can see their outputted values in the JSP for sure when I use <%=%> . Any help is welcome

[Srinivasan thoyyeti]

Have you forwarded the request from jsp to servlet ?

[Anupam Sinha]

When you set a request attribute in the JSP it is for that request. Request generally terminates at the JSP hence when you don't explixitly forward the request the request.setAttribute would only be available to that JSP page only and any included page.

The hidden form fields should work.

[Mirko Bonasorte]

Hi,

I don't understand your JSP: who sets the request attributes 'message', 'paramName' and 'jobs'? Were you trying to use 'request.getParameter(String)'?

[Herman Schelti]

hi Tontang,

you can use hidden input fields (inside a form),

to retrieve them in your servlet use the getParameter(..) method.
(instead of getAttribute(..))

Herman

[Manzar Zaidi]

I dont see any problems with the code, it is doing what you rote it for,
When you write

String jobCat=(String)request.getAttribute("paramName");

If the attribute paramName is not set, it returns null.

Then if you set that back as a request attribute you get null on subsequent calls.

request.setAttribute("jobCat",jobCat);    

So that

String jobCat=(String)request.getAttribute("jobCat")    

Will return null.