Variables in a Servlet

[krishkill]

Hi,

I'm using some variables in a servlet. the servlet response in a jsp page which after taking some more parameters gets redirected to another servlet. I want to use same variables I used in first servlet in the new one. How should i declare inorder to use this way. I know something like session attributes, but donno how to implement it. please help . please let me know the syntax.

Thanks

[travishein]

the session is a property of the servlet request object.


in the first servlet,

public void doGet(HttpServletRequest request,  HttpServletResponse response) throws ServletException, IOException {

  request.getSession().setAttribute("paramName",  "some value");

}

where the value is any object.

in the second servlet

public void doGet(HttpServletRequest request,  HttpServletResponse response) throws ServletException, IOException {

  Object val = request.getSession().getAttribute("paramName");

}

where you need to know the class type, usually by casting

String value = (String) request.geSession().getAttribute("paramName");

[Sno]

wouldn't

request.getParameter("paramName")

work also?

for the second servlet also work?

[travishein]

Yes, request.getParameter() would work on the second page, if the first page did a redirection thru a link on the page where there are URL parameters, or if there was a <form> element that was submitted.

If the first page is submitted back to itself and the server side does a HTTP 302 redirect, it might not have the URL parameters on the second page ?