CODEWITHSUNDEEP
jspjakarta-eejstlel
user1471159
user1471159

Reputation:

method for passing java variable value to jstl in jsp page

I found out the code to pass a java variable to jstl like this :-

<%
String str = "abc";
pageContext.setAttribute("str", str);
%>

and to get that value in jstl tags we will have to use the code like this :-

<c:out value="${str}"/>

My main question is that, if there any other method to do so to pass on the values, from java to jstl?

Upvotes: 0

Views: 5112

Answers (2)

Jigar Joshi
Jigar Joshi

Reputation: 240890

it looks for pageContext, request attributes, session attributes, application context for variable resolution, so you can put the value in any of this

in this example you are putting it in pageContext

From our EL wiki

${str}

does basically the same as the following in "raw" scriptlet code (the below example is for simplicity, in reality the reflection API is used to obtain the methods and invoke them):

where PageContext#findAttribute() scans the attributes of respectively the PageContext (page scope), HttpServletRequest (request scope), HttpSession (session scope) and ServletContext (application scope) until the first non-null value is found. Please note that it thus doesn't print "null" when the value is null nor throws a NullPointerException unlike as when using scriptlets. In other words, EL is null-safe.

Upvotes: 2

AllTooSir
AllTooSir

Reputation: 49372

You are not passing values to JSTL , you are setting scoped attributes . You can set attributes to request,session and context or you can pass request parameters to the JSP.

Upvotes: 0

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