Programming Jakarta Struts, Second Edition

Bean Tags

The tags that are part of the Bean tag library are used for accessing JavaBeans and their associated properties as well as for defining new beans that are accessible to the remainder of the page via scripting variables and page-scope attributes. Convenient mechanisms to create new beans based on the values of request cookies, headers, and parameters are also provided. Table 8-9 lists the tags within the Bean tag library.

Table 8-9. Custom tags within the Bean tag library

Tag name	Description
cookie	Define a scripting variable based on the value(s) of the specified request cookie.
define	Define a scripting variable based on the value(s) of the specified bean property.
header	Define a scripting variable based on the value(s) of the specified request header.
include	Load the response from a dynamic application request and make it available as a bean.
message	Render an internationalized message string to the response.
page	Expose a specified item from the page context as a bean.
parameter	Define a scripting variable based on the value(s) of the specified request parameter.
resource	Load a web application resource and make it available as a bean.
size	Define a bean containing the number of elements in a Collection or Map.
struts	Expose a named Struts internal configuration object as a bean.
write	Render the value of the specified bean property.

Warning

Many of the tags in this tag library throw a JspException at runtime when they are used incorrectly ...