Struts logic tag equals not working

问题

Very quick questions. Could someone explain to me why this code does not work?

<%@ taglib prefix="logic"   uri="/WEB-INF/struts-logic.tld" %>

<%
    int myValue= 2;
%>

myValue: <%=myValue%>
<br/>
<logic:equal name="myValue" value="2" scope="session">
    logic:equal works!
</logic:equal>

Even if I change myValue to a String is still doesn't work

Quite frustrating, cause I know it's going to be something obvious.

Thanks in advance

KS

---

Working example!

<%@ taglib prefix="logic" uri="/WEB-INF/struts-logic.tld" %>

<%
    request.setAttribute("myValue", 2);
%>

myValue - <%=request.getAttribute("myValue")%>]]

<br/>
<logic:equal name="myValue" value="2" scope="request">
    logic:equal works!
</logic:equal>

回答1:

<logic:equal name="myValue" value="2" scope="session">

This tag looks for a session attribute named "myValue". Not for a local variable named "myValue".

The real question is: why are you using a tag library which is marked as deprecated in favor of the JSTL, this library being part of a framework which is officially abandoned?

回答2:

Scriptlet variables is not accessible to any scope. You can only use them with scriptlet expressions.

In the Struts is possible to use JSTL along with Struts tags

<c:set var="myValue" value="2"/>
<c:if test="${myValue == 2}">
  if test works!
</c:if>

来源：https://stackoverflow.com/questions/19979470/struts-logic-tag-equals-not-working