Get the values in Param, request, session, application in JSP/FTL

Source: Internet
Author: User

Java JSP (el expression) FTL
<% page.getAttribute("attr") %> $ {Pagescope. attr} -
Ii request.getParameter("attr") $ {param.attr} $ {requestparameters.attr}
request.getAtrribute("attr") $ {requestscope.attr} $ {request.attr}
session.getAttribute("attr") $ {sessionscope.attr} $ {session.attr}
application.getAttribute("attr") $ {applicationscope.attr} $ {application.attr}

②: Used to get parameter values in the Address bar

Do not set scope value: ${attr}

Page⑴-> request-> session-> Application
If scopes are not explicitly specified, they are obtained in order from small to large, and once taken, they are no longer acquired.

The ⑴:jsp page is unique to the built-in object and can only be used in JSP pages.

Get the values in Param, request, session, application in JSP/FTL

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