Session Arrays in JSP

Question

Can someone help me in making a array session in JSP? I want to add an item to the array in some part and later on access the whole value of item in my controller. I know how to do it on singular variables but i want to do it in array. Hoping someone can help me. Thank you so much.

I want to do something like

<%
    session.setAttribute( "theName[]", "sample name" );
%>

But I don't know how to do it.

Do you mean to use list as https://stackoverflow.com/questions/19766963/passing-arraylist-from-servlet-to-jsp — Ori Marko, Nov 18 '18 at 12:06

score 0 · Answer 1 · edited Jun 20 '20 at 09:12

0

Similar to request.setAttribute, you can add Object using setAttribute and get it using getAttribute, e.g. JSP code:

List<String> sample = new ArrayList<>();
sample.add("1");
session.setAttribute( "sampleName",  sample);

And get it later in Controller

ArrayList<String> samples =  (ArrayList<String> sample)session.getAttribute("sampleName");
samples.get(0); // Use get/set to get/update array

Also if you meant to use public java.lang.String[] getValueNames() use getAttributeNames() instead

Deprecated. As of Version 2.2, this method is replaced by getAttributeNames()

edited Jun 20 '20 at 09:12

Community

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answered Nov 18 '18 at 12:22

Ori Marko

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what is "sample" in (ArrayList sample) – trumanblack1025 Nov 18 '18 at 13:32

Session Arrays in JSP

1 Answers1