EL Functions
Starting with JSTL 1.1, one tag library contains a set of functions for use in EL expressions. The description of each function follows a similar pattern as the action descriptions: an overview, a syntax reference, a parameter table, and an example. The syntax reference section shows the return type, followed by the function name and the parameters in italics within parentheses.
Unless otherwise stated, a parameter value of null
is treated as an empty string.
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