You can use session.setAttribute() and session.getAttribute() methods. In your action class,

String[] arr = {"A","B","C","D"};
for (int x = 0; x < arr .length; x++) {
out.println(arr[x]);
}
session.setAttribute("names", arr);

And through your jsp page, get array values.

<%
try {

String[] str = (String[]) session.getAttribute("names");

for (int x = 0; x < str.length; x++) {
out.println(str[x]);
}

} catch (Exception e) {
out.println(e);
}
%>

but, we can not use java code in jsp. with out using java code in jsp, is it possible?