page --the instance of this page’s implementation class processing the current request.
request --The request triggering the service invocation.
session --The session object created for the requesting client (if any).This variable is only valid for Http protocols.
application --The servlet context obtained from the servlet configuration object (as in the call getServletConfig().getContext() )
request --The request triggering the service invocation.
session --The session object created for the requesting client (if any).This variable is only valid for Http protocols.
application --The servlet context obtained from the servlet configuration object (as in the call getServletConfig().getContext() )
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