Getting attribute value through constant variable - JSTL

Question

In my project, I set up the Constant class like this

class Constant {
    public static final String PARA = "para";

    public Integer getPARA () {
        return PARA;
    }
}

in order to access the constant from the jsp through el

<!-- test.jsp -->
<jsp:useBean id="cons" class="com.test.Constant" scope="session"/>

...
${cons.PARA}

Now, in my java code, I set an attribute for that constant

// foo.java
request.setAttribute(Constant.PARA, "this is a param");

To access that attribute in the jsp, we could do ${para} but how can I access the attribute value ("this is a param") through that constant variable cons.PARAM ? In short, how can we convert the following code into jstl ?

<%=request.getAttribute(Constant.PARA)%>

score 3 · Accepted Answer · answered May 06 '13 at 07:20

3

Just found out 1 way to do it

<c:set var='param' value="${cons.PARA}" />

<c:out value="${requestScope[param] }" />

answered May 06 '13 at 07:20

Thai Tran

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1

That's the right way to do it. You can do it in one line with `` – JB Nizet May 06 '13 at 07:22
yup, I just figured out as well :D – Thai Tran May 06 '13 at 07:26

Getting attribute value through constant variable - JSTL

1 Answers1