Objetos request y response

https://jtagua.wordpress.com/2010/10/07/tutorial-de-jsp-12-objeto-implicito-request/

https://jtagua.wordpress.com/2010/10/17/tutorial-de-jsp-13-objeto-implicito-response/

https://beginnersbook.com/2013/11/jsp-implicit-object-response-with-examples/

http://chuwiki.chuidiang.org/index.php?title=Pasar_datos_entre_JSPs_y_Servlets._Page,_Request,_Session_y_Application_scope

<%
String nombre=request.getParameter("nombre");
String email=request.getParameter("email");

if (nombre.equals("admin")){
	response.sendRedirect("admin.jsp");
}
%>

Otro ejemplo:

<%
	String num1 = request.getParameter("num1");
	String num2 = request.getParameter("num2");
	if (num1!=null && !num1.equals("")) {
		out.print("Has enviado " + num1 + " y " + num2);
		int suma=Integer.parseInt(num1)+Integer.parseInt(num2);
		%>
		<h2>La suma es <%=suma %></h2>
		<%
	}
	%>

	<form>
		<input type="text" name="num1"> <input type="text" name="num2">
		<input type="submit">
	</form>