Class EvalTag

  • All Implemented Interfaces:, IterationTag, JspTag, Tag, TryCatchFinally

    public class EvalTag
    extends HtmlEscapingAwareTag
    The <eval> tag evaluates a Spring expression (SpEL) and either prints the result or assigns it to a variable. Supports the standard JSP evaluation context consisting of implicit variables and scoped attributes.
    Attribute Summary
    Attribute Required? Runtime Expression? Description
    expression true true The expression to evaluate.
    htmlEscape false true Set HTML escaping for this tag, as a boolean value. Overrides the default HTML escaping setting for the current page.
    javaScriptEscape false true Set JavaScript escaping for this tag, as a boolean value. Default is false.
    scope false true The scope for the var. 'application', 'session', 'request' and 'page' scopes are supported. Defaults to page scope. This attribute has no effect unless the var attribute is also defined.
    var false true The name of the variable to export the evaluation result to. If not specified the evaluation result is converted to a String and written as output.
    Keith Donald, Juergen Hoeller
    See Also:
    Serialized Form
    • Constructor Detail

      • EvalTag

        public EvalTag()
    • Method Detail

      • setExpression

        public void setExpression(java.lang.String expression)
        Set the expression to evaluate.
      • setVar

        public void setVar(java.lang.String var)
        Set the variable name to expose the evaluation result under. Defaults to rendering the result to the current JspWriter.
      • setScope

        public void setScope(java.lang.String scope)
        Set the scope to export the evaluation result to. This attribute has no meaning unless var is also defined.
      • setJavaScriptEscape

        public void setJavaScriptEscape(boolean javaScriptEscape)
                                 throws JspException
        Set JavaScript escaping for this tag, as boolean value. Default is "false".