Action Element Of Java Server Pages In Enterprise Java

#Action #Element Of #Java #Server #Pages In #Enterprise #Java

#Actions are #specific #tags that:
Affect the #runtime behavior of #JSP
Affect the #response sent back to the #client
Allow the #transfer of control between #pages

Actions use construct in #XML syntax.
These constructs control the behavior of the Servlet #engine.

They Are Typically Used To:
#Dynamically insert a file.
#Reuse JavaBean components.
#Forward the user to another page.
Access Parameters sent with the request to do a database lookup.
Generate #HTML such as table populated with information retrieved from an external system.

#Including Other Files
This action [jsp:include] allow a static or dynamic resource to be included in the current JSP at request time.
The included page can therefore be a static document, CGI Script, Servlet or another JSP page.

#Forwarding JSP page To Another Page
The current JSP page can be transferred to another page without returning back to the current JSP page.
This transferring of JSP page to another page is known as Forwarding.
jsp:forward allows forwarding i.e. it permanently transfers processing from one jsp to another on the local server.
Any content generated by the original page is discarded and the processing begins fresh at the second JSP.
Using jsp:forward, the request can be forward to another JSP, a Servlet or a static resource.


#Passing parameters For Other Actions
jsp:param is used to specify additional request parameters for the target resource by appending parameters to the request object.
This element is used in the body of jsp:forward or jsp:include.

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