10.5. Predefined Variables
To simplify code in JSP expressions and scriptlets, you are supplied with eight automatically defined variables, sometimes called implicit objects. Since JSP declarations (see Section 10.4) result in code that appears outside of the _jspService method, these variables are not accessible in declarations. The available variables are request, response, out, session, application, config, pageContext, and page. Details for each are given below.
request
This variable is the HttpServletRequest associated with the request; it gives you access to the request parameters, the request type (e.g., GET or POST), and the incoming HTTP headers (e.g., cookies). Strictly speaking, if the protocol in the request is something other than ...
Get Core Servlets and JavaServer Pages™ now with the O’Reilly learning platform.
O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.
