Java Reference
In-Depth Information
Table 3-6.
JSTL Core Library
Functional Areas
Description
General-purpose actions
Used to manipulate the scoped variables
Conditional actions
Used for conditional processing within a JSP page
Iterator actions
Used to iterate through collections of objects
URL-related actions
Used for dealing with URL resources in a JSP page
General-Purpose Actions
The general-purpose actions provide the means to work with scoped variables. Table
3-7
describes
the general-purpose actions in the core tag library.
Table 3-7.
General-Purpose Actions
Action
Description
<c:out>
Evaluates an expression and outputs the result to the
JspWriter
object
<c:set>
Sets the value of a scoped variable or a property of a target object
<c:remove>
Removes a scoped variable
<c:catch>
Catches a
java.lang.Throwable
thrown by any of its nested actions
The <c:out> Action
The
<c:out>
action evaluates an expression and displays the result. It's equivalent to the JSP syntax
<%= expression %>
.
Here's the syntax without a body:
<c:out value="value" [escapeXml="{true|false}"][default="defaultValue"] />
Here's the syntax with a body:
<c:out value="value" [escapeXml="{true|false}"]>
default value
</c:out>Items in brackets are optional
Table
3-8
describes the attributes of
<c:out>
. Since this chapter covers JSTL comprehensively,
I recommend you read the JSTL specification
3
for a thorough understanding of how to use JSTL
attributes.
3
