<%@ page language="java" contentType="text/html;charset=Windows-31J"%> <%@ taglib prefix="fn" uri="http://java.sun.com/jsp/jstl/functions"%>
<html><body>
${ fn:substringBefore( 'aaabbbccc' , 'bbb' ) } ・・・ 「aaa」を返す
</body></html>