Definitely use Servlet.
Web server  i am using is sun java webserver
but best web  server is perhaps
Apache for beginner.
WebSphere/Weblogic for regular commercial uses

1.jsp is a servlet, the jsp  is parsed to a .java servlet  class em then
compiled to a .class bytecode...
The situation u are describing is very simple... u can do it
with simple jsp's
If u will not have a huge amount of page hits, u can use tomcat,
its very stable and completely compliant with the latest java
technologies...