Examples of EL Expressions

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Examples of EL Expressions

and

not

true

false

null

instanceof

empty

div

mod

Note that many of these words are not in the language now, but they may be in the future, so
you should avoid using them.

Examples of EL Expressions

Table 55

contains example EL expressions and the result of evaluating them.

TABLE 55

Example Expressions

EL Expression

Result

${1 > (4/2)}

false

${4.0 >= 3}

true

${100.0 == 100}

true

${(10*10) ne 100}

false

${'a' < 'b'}

true

${'hip' gt 'hit'}

false

${4 > 3}

true

${1.2E4 + 1.4}

12001.4

${3 div 4}

0.75

${10 mod 4}

${!empty param.Add}

False if the request parameter named Add is null or an empty
string.

${pageContext.request.contextPath}

The context path.

${sessionScope.cart.numberOfItems}

The value of the numberOfItems property of the
session-scoped attribute named cart.

${param['mycom.productId']}

The value of the request parameter named mycom.productId.

${header[

"host"]}

The host.

Unified Expression Language

The Java EE 5 Tutorial · September 2007

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