How to pass an integer value from one jsp page to other jsp page?

Question

i have two file abc.jsp & def.jsp. in abc.jsp, it contains this code:

<%
        String selectedCourse = request.getParameter("course");
        int count = 0;

        if(selectedCourse.equals("PHP")){
            count = count + 1;
        }

    %>

i want this count value in def.jsp, so how can i pass this value?

Check this one https://stackoverflow.com/questions/18763168/sending-variable-from-one-jsp-to-another-jsp — Sana, Jul 15 '19 at 10:09
i want to pass integer, i can pass string, but can't pass integer! — Axon, Jul 15 '19 at 10:28
Exactly the same way, just use `Integer` and not `int` (i.e. object, not the primitive type). — Jozef Chocholacek, Jul 15 '19 at 10:53
Everytime you come to `abc.jsp` page you intialize your count to `0` , So previous value it has in it will get lost .Try to store `count` in `session` and retreive count from `session` and then add it with `1` , also has `count` is already in session you can get that in any page i.e by writing `int count = session.getAttribute("count"); ` . — Swati, Jul 15 '19 at 11:32

score 1 · Answer 1 · answered Jul 15 '19 at 11:41

abc.jsp

<%!
private synchronized void incrementCounter() {
  Integer count = session.getAttribute("count");
  if (count == null) {
    count = new Integer(0);
  }
  count++;
  session.setAttribute("count", new Integer(count));
}
%>

<%
String selectedCourse = request.getParameter("course");
if(selectedCourse.equals("PHP")){
  incrementCounter();
}
%>

def.jsp

<%
int count = session.getAttribute("count"); 
%>

Anyway, such logic should not be in JSP, but belongs into a controller (servlet).

Sana · Answer 2 · 2019-07-15T11:38:51.987

0

Use Session Attributes

abc.jsp

<%
    String selectedCourse = request.getParameter("course");
    int count = 0;

    if(selectedCourse.equals("PHP")){
        count = count + 1;
    }
     session.setAttribute("count", count);
%>

def.jsp

int count1 = Integer.parseInt(session.getAttribute("count").toString());

out.write("count:"+count1);

edited Jul 15 '19 at 11:38

answered Jul 15 '19 at 11:11

Sana

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not working, getting the initialize value of count 0 always! – Axon Jul 15 '19 at 11:15
int count1 = Integer.parseInt(session.getAttribute("count").toString()); out.write("count:"+count1); – Sana Jul 15 '19 at 11:37
int count1 = Integer.parseInt(session.getAttribute("count").toString()); is not working, it catches nullPointerException after running! – Axon Jul 15 '19 at 16:42

How to pass an integer value from one jsp page to other jsp page?

2 Answers2