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Appendix A

Servlet and JSP Quick Reference

The session Attribute

<%@ page session="true" %> <%!   Default   %>

<%@ page session="false" %>

The buffer Attribute

<%@ page buffer="sizekb" %>

<%@ page buffer="none" %>

  Servers can use a larger buffer than you specify, but not a smaller one. 

For example, 

<%@ page buffer="32kb" %>

 means the document 

content should be buffered and not sent to the client until at least 32 

kilobytes have been accumulated or the page is completed.

The autoflush Attribute

<%@ page autoflush="true" %> <%!   Default   %>

<%@ page autoflush="false" %>

  A value of 

false

 is illegal when 

buffer="none"

 is also used. 

The extends Attribute

<%@ page extends="package.class" %>

The info Attribute

<%@ page info="Some Message" %>

The errorPage Attribute

<%@ page errorPage="Relative URL" %>

  The exception thrown will be automatically available to the designated 

error page by means of the 

exception

 variable. See Listings 11.5 and 

11.6 for examples.

The isErrorPage Attribute

<%@ page isErrorPage="true" %>

<%@ page isErrorPage="false" %> <%!   Default   %>

  See Listings 11.5 and 11.6 for examples.

The language Attribute

<%@ page language="cobol" %>

  For now, don t bother with this attribute since 

java

 is both the default 

and the only legal choice. 

Second edition of this book: www.coreservlets.com; Sequel: www.moreservlets.com.

Servlet and JSP training courses by book's author: courses.coreservlets.com.