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 ${fn:split()} … Read more
In your specific case, org.apache.jasper.JasperException: The absolute uri: http://java.sun.com/jstl/core cannot be resolved in either web.xml or the jar files deployed with this application that URI is for JSTL 1.0, but you’re actually using JSTL 1.2 which uses URIs with an additional /jsp path. This URI change is because JSTL, who invented EL expressions, was since … Read more
You could do this using JSTL tags, but the result is not optimal: <%@ taglib prefix=”c” uri=”http://java.sun.com/jsp/jstl/core”%> <html> <body> <jsp:useBean id=”numbers” class=”java.util.HashSet” scope=”request”> <% numbers.add(“one”); numbers.add(“two”); numbers.add(“three”); %> </jsp:useBean> <c:forEach items=”${numbers}” var=”value”> <c:if test=”${value == ‘two’}”> <c:set var=”found” value=”true” scope=”request” /> </c:if> </c:forEach> ${found} </body> </html> A better way would be to use a custom … Read more
You are looking for fn:length(services). Remember to define the fn namespace. http://download.oracle.com/javaee/5/tutorial/doc/bnalg.html
Use taglib definition in your JSP or better include it in every page by the first line. <%@ taglib prefix=”c” uri=”http://java.sun.com/jsp/jstl/core” %> There’s also fix jstl-1.2 dependency in your project. Also use servlet specification at least 2.4 in your web.xml. The maven dependencies are (maven is a open source development tool) <dependency> <groupId>jstl</groupId> <artifactId>jstl</artifactId> <version>1.2</version> … Read more
It is an EL expression basically it outputs the value that result from evaluating the expression, to put it simply, it allows you to access the values of the properties of your Java beans using “dots” instead of using getters and setters, using it you can access instances of beans that can be in session, … Read more
Replace object with the bean to determine. <c:set var=”object” value=”${product}” /> Display all declared fields and their values. <c:if test=”${not empty object[‘class’].declaredFields}”> <h2>Declared fields <em>${object.name}</em></h2> <ul> <c:forEach var=”field” items=”${object[‘class’].declaredFields}”> <c:catch><li><span style=”font-weight: bold”> ${field.name}: </span>${object[field.name]}</li> </c:catch> </c:forEach> </ul> </c:if> Display all declared methods. <c:if test=”${not empty object[‘class’].declaredMethods}”> <h2>Declared methods<em><% object.getName() %></em></h2> <ul> <c:forEach var=”method” items=”${object[‘class’].declaredMethods}”> <c:catch><li>${method.name}</li></c:catch> … 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
Here is one: Also I want to add some information about Java EE7: In Java EE 7, no changes were made to JSP and JSTL because these specifications have not been updated. Expression Language has been removed from JSP and now has its own JSR (341). Servlets and JSF have both been updated. WebSocket 1.0 … Read more