set

Please make sure you have read the Tag Syntax document and understand how tag attribute syntax works.

Description

The set tag assigns a value to a variable in a specified scope. It is useful when you wish to assign a variable to a complex expression and then simply reference that variable each time rather than the complex expression. This is useful in both cases: when the complex expression takes time (performance improvement) or is hard to read (code readability improvement).

If the tag is used with body content, the evaluation of the value parameter is omitted. Instead, the String to which the body evaluates is set as value for the scoped variable.

The scopes available are as follows:

application - the value will be set in application scope according to servlet spec. using the name as its key
session - the value will be set in session scope according to servlet spec. using the name as key
request - the value will be set in request scope according to servlet spec. using the name as key
page - the value will be set in page scope according to servlet spec. using the name as key (retrieve via #attr)
action - the value will be set in the page scope and Struts’ action context using the name as key

NOTE: If no scope is specified, it will default to action scope. For the set tag specifically, this also places (sets) the generated value into the page scope as well (retrieve via #attr).

Assigns a value to a variable in a specified scope

Attributes

Name	Required	Default	Evaluated	Type	Description
Dynamic Attributes Allowed: false

performClearTagStateForTagPoolingServers	false	false	false	Boolean	Whether to clear all tag state during doEndTag() processing (if applicable)
scope	false	action	false	String	The scope in which to assign the variable. Can be application, session, request, page, or action (action scope also adds it to the page scope).
trimBody	false	true	false	Boolean	Set to false to prevent the default whitespace-trim of this tag's body content
value	false		false	String	The value that is assigned to the variable named name
var	true		false	String	Name used to reference the value pushed into the Value Stack (default scope: action,override with the scope attribute).

Examples

<s:set var="personName" value="person.name"/>
Hello, <s:property value="#personName"/>

<s:set var="janesName">Jane Doe</s:set>
<s:property value="#janesName"/>

set

Description

Attributes

Dynamic Attributes Allowed:

Name

Required

Default

Evaluated

Type

Description

Examples