If you’re already on EL 3.0 (Tomcat 8+, WildFly 8+, GlassFish 4+, Payara 4+, TomEE 7+, etc), which supports new operations on collection objects, you can use ${[…]} syntax to construct a list, and ${{…}} syntax to construct a set. <c:set var=”alphabet” value=”${[‘A’,’B’,’C’,’D’,’E’,’F’,’G’,’H’,’I’,’J’,’K’,’L’,’M’,’N’,’O’,’P’,’Q’,’R’,’S’,’T’,’U’,’V’,’W’,’X’,’Y’,’Z’]}” scope=”application” /> If you’re not on EL 3.0 yet, use the ${fn:split()} … Read more
I know it’s supposed to be on by default, but I run across pages now and again (or even the same page that changes behavior) where the EL processing doesn’t happen. Adding the following to the top of any such pages should resolve the issue: <%@ page isELIgnored=”false” %> I add it to every page … Read more
EL does not support it, no. It’ll always be the first method of the Class#getMethods() array whose name (and amount of arguments) matches the EL method call. Whether it returns the same method everytime or not depends on the JVM make/version used. Perhaps you made a Java SE upgrade in the meanwhile as well. The … Read more
A slightly different question that I looked for here: “How do you pass an object to a tag file?” Answer: Use the “type” attribute of the attribute directive: <%@ attribute name=”field” required=”true” type=”com.mycompany.MyClass” %> The type defaults to java.lang.String, so without it you’ll get an error if you try to access object fields saying that … Read more
You are looking for fn:length(services). Remember to define the fn namespace. http://download.oracle.com/javaee/5/tutorial/doc/bnalg.html
It is an EL expression basically it outputs the value that result from evaluating the expression, to put it simply, it allows you to access the values of the properties of your Java beans using “dots” instead of using getters and setters, using it you can access instances of beans that can be in session, … Read more
It’s just the attribute name as you’ve set yourself here: request.setAttribute(“list”, fooList); It’s thus “list”: ${list} This works the same way for session.setAttribute(“name”, value) and application.setAttribute(“name”, value). The value is in EL available by just ${name}. More detail: EL uses by default PageContext#findAttribute() which scans in subsequently the page, request, session and application scopes for … Read more
The <c:url> does not encode the URI as specified in its value, but just URL request parameters which are specified by a nested <c:param>. The IBM article which you linked also doesn’t tell otherwise. I think that you confused it with “URL rewriting” (which is in essence nothing more than appending the jsessionid whenever necessary). … Read more
javax.el.PropertyNotFoundException: Property ‘foo’ not found on type com.example.Bean This literally means that the mentioned class com.example.Bean doesn’t have a public (non-static!) getter method for the mentioned property foo. Note that the field itself is irrelevant here! The public getter method name must start with get, followed by the property name which is capitalized at only … Read more
As an alternative: <fmt:formatNumber var=”expiry” value=”${(expire.time – now.time) / (60 * 1000)}” maxFractionDigits=”0″ /> This way you do not lose localization (commas and dots).