j2ee: JSP Directives [13/20]

Directives are page dependent properties that are passed on to the JSP container

3 Types

• page
• include
• taglib

Syntax:<%@ directive { attr="value" }* %>

Page

Syntax:<%@ page page_directive_attr_list %>

        page_directive_attr_list ::= { language="java"}
        { extends="className" } - JSP base class
        { import="importList" } 
            -java.lang.*, javax.servlet.*, javax.servlet.jsp.* and javax.servlet.http.*
        { session="true|false" } 
            - whether the page participates in a session
        { buffer="none| 8kb |sizekb" }
        { autoFlush="true|false" } 
            -illegal to make buffer = none when autoflush is false
        { isThreadSafe="true|false" }
        { info="info_text" }
        { errorPage="error_url" }
        { isErrorPage="true|false" }
        { contentType="ctinfo" } - "text/html"
        { pageEncoding="peinfo" } - "ISO-8859-1"
        

Taglib

Syntax:<%@ taglib uri="tagLibraryURI" prefix="tagPrefix" %>

Example:

        <%@ taglib uri="http://www.mycompany.com/supertags" prefix="myco" />
            ...
            <myco:TagName>
            ...
            </myco:TagName>
        

Include

Syntax:<%@ include file="relativeURLspec" %>

Example:

        <%@ include file="copyright.html" %>
        

Requests the inclusion of the file at translation time