Скачать или смотреть 36 JSP Directive Tags page, include, taglib | JSP Tutorial | 2024 10 10 09 54 58

Important note Points about Yesterdays Evening HTML to JSP with DB Web Appl:
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In the HTML to JSP with Database web application we used all the 3 lifecycle convenience methods.

We embedded JDBC Driver details as init parameter values in web.xml.

Used all types of scripting elements.

Even though implicit objects of JSP (like config) are directly in the declaration tag (%! %) but they can be directly accessed through additional programming done in the declaration tag....

getServletConfig(), getServletContext() methods in declaration tag of JSP are used to get access to ServletConfig, ServletContext objects without depending upon the implicit objects like config, and application.

JSP equivalent servlet Program (JESP) takes care of exception handling only for the code that comes to _jspService(-,-) of scriptlet tag/code, expression code.

For Java code of the declaration tag we must catch and handle the exception.

Note: A very good Java programmer avoids calling out.println() in jis JSP code because its the programmer responsibility to mix up the business logic with presentation logic (HTML )


4) Directive Tags :
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Directive tags give directions / instructions to JSP page compiler to generate appropriate Java code in JSP equivalent servlet program (JESP) as required for application needs


i) page directive:
page directive allows to supply of global information to jsp programs like a package, imports, buffer size, content type & etc....

ii) include directive:
include directive allows to include the code to destination program to the code of source jsp program..

iii) taglib directive:
taglib directive allows to work with custom and third-party JSP tags.



i) page directive:
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page directive allows to supply of global information to jsp program like a package, imports, buffer size, content type &, etc....

Standard Syntax:





XML syntax: