java - null request response in simple jsp file -


i trying set basic jsp file takes in query url , displays it. have following test.jsp file run on server:

<%@ page language="java" contenttype="text/html; charset=iso-8859-1" pageencoding="iso-8859-1"%> <!doctype html public "-//w3c//dtd html 4.01 transitional//en"  "http://www.w3.org/tr/html4/loose.dtd"> <html> <head> <meta http-equiv="content-type" content="text/html; charset=iso-8859-1"> <title>test jsp</title> </head> <body> <% string firstname = (string) request.getattribute("firstname");  out.println("hello :" + firstname);%>  </body> </html>

however, when type in following url, still "null" result (even after refreshing): see picture.

note: ultimate goal have event @ point sends post request java file , display result in jsp page. if understood research, have via servlet dispacherrequest forwarding method. first want understand why simple aforementioned code isnt working).

thank !

you mention you're trying display query parameter url. query or request parameter not same request attribute.

to query parameter, have use getparameter() method:

string firstname = request.getparameter("firstname")

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