Directives in JSP

Brief about Directives in JSP:

Directives are direction providers which also provides instructions to the container and help finding files and methods and etc. They tell how to handle a particular request and JSP processing.There are three directives and they are:


The page Directive: This directives are used to provide information to container which belongs to the present JSP page , page Directive might be coded anywhere in the page.The attributes for page directive are:

Attribute	Purpose
buffer	This specifies a buffering model for the output stream.
autoFlush	It controls the behavior of the servlet output buffer.
contentType	This defines the character encoding scheme.
errorPage	This defines the URL of another JSP that reports on Java unchecked runtime exceptions.
isErrorPage	It indicates if this JSP page is a URL specified by another JSP page's errorPage attribute.
extends	This specifies a superclass that the generated servlet must extend
import	This specifies a list of packages or classes for use in the JSP as the Java import statement does for Java classes.
info	This defines a string that can be accessed with the servlet's getServletInfo() method.
isThreadSafe	This defines the threading model for the generated servlet.
language	This defines the programming language used in the JSP page.
session	This specifies whether or not the JSP page participates in HTTP sessions
isELIgnored	This specifies whether or not EL expression within the JSP page will be ignored.
isScriptingEnabled	It determines if scripting elements are allowed for use.

The include Directive:  These Directives are used to include files during translation phase.

The taglib Directive : The taglib directive declares that your JSP page uses a set of custom tags, identifies the location of the library, and provides a means for identifying the custom tags in your JSP page.