JavaServer Pages, Second Edition

Name

<c:out>

Synopsis

The <c:out> action adds the evaluation result of an expression to the current response buffer (JspWriter), or a default value if the main expression evaluates to null. The evaluation result is always converted to a String; it follows the coercing rules described in Appendix C.

Syntax 1: Without a body

<c:out value="expression" [escapeXml="[true|false]"]
  [default="defaultExpression"] />

Syntax 2: With a body

<c:out value="expression" [escapeXml="[true|false]"]>
  defaultExpression
</c:out>

Attributes

Attributename	Java type	Dynamic valueaccepted	Description
value	Object	Yes	The expression to evaluate.
escapeXml	boolean	Yes	If true, the characters < > & ' " are converted to the corresponding XML character entity codes.
default	Object	Yes	The default expression to use if the expression defined by value evaluates to null. If no default is specified, the empty string is used as the ultimate default.

Example

<c:out value="${param.phone}" default="No phone" />
  
<c:out value="${user.imageURL}">
  <c:url value="/defaultUserImage.jpg" />
</c:out>