CODEWITHSUNDEEP
jspjstleljsp-tags
brownmamba
brownmamba

Reputation: 755

What does the dollar curly brackets ${} mean in JSP?

What does ${} means in JSP? For example,

<c:if test="${!empty cookie.lang}">
    <fmt:setLocale value="${cookie.lang.value}" />
</c:if>

Upvotes: 32

Views: 53505

Answers (4)

Jasper de Vries
Jasper de Vries

Reputation: 20198

It's indeed an Expression Language expression. A great resource is the tag on this site, especially the Expression Language wiki is a must read in my opinion.

Upvotes: 1

RRoman
RRoman

Reputation: 751

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, request, or page scope.

Upvotes: 24

Victor
Victor

Reputation: 17097

It is Expression Language. Before EL evolved, the same purpose was achieved by using scriptlets <%=..%>The primary purpose of using this syntax is to avoid scriptlets in jsp. Scriptlets and the enclosed java code is considered bad practise because jsps are not 'supposed' to have java code. At least that is the theory.

Upvotes: 11

Jan Zyka
Jan Zyka

Reputation: 17888

The ${} referes to EL expressions. You usually access some managed beans on the server via the EL expression.

Upvotes: 4

Related Questions