el 식

contains() --> ${fn:contains('Hello', 'el')}<br>
containsIgnoreCase() --> ${fn:containsIgnoreCase('HELLO', 'el')}<br>
endsWith() --> ${fn:endsWith('Hello', 'llo')}<br>
escapeXml() --> ${fn:escapeXml('1<>3')}<br>
indexOf() --> ${fn:indexOf('Hello', 'el')}<br>
join()/split() --> ${fn:join(fn:split('/1/2/3/4/5', '/'), ':')}<br>
length() --> ${fn:length('Hello')}<br>
replace() --> ${fn:replace('Hello', 'H', 'J')}<br>
startsWith() --> ${fn:startsWith('Hello', 'He')}<br>
substring() --> ${fn:substring('Hello', 2, 4)}<br>
substringAfter() --> ${fn:substringAfter('Hello', 'el')}<br>
substringBefore() --> ${fn:substringBefore('Hello', 'el')}<br>
toLowerCase() --> ${fn:toLowerCase('HELLO')}<br>
toUpperCase() --> ${fn:toUpperCase('hello')}<br>
trim() --> ${fn:trim('  hello  ')}<br>