How to use jsp variable in javascript array?

Question

Hi I have a jsp page where I have some variable. I want to access the variable in a javascript array. How can I get this?

Demo.jsp

<%@page contentType="text/html" pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
    <head>
        <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
        <title>JSP Page</title>
    </head>
    <body>
       <%
int i=1;
int j=2;
int k=3;
int l=4;
%> 

   </body>
</html>

I want to use these 4 variables in the javascript array and print them. How can I achieve this?

stackoverflow.com/questions/15523379/…

Govind Singh
– Govind Singh

2014-05-01 11:24:10 +00:00
Commented May 1, 2014 at 11:24 — Govind Singh
– Govind Singh, Commented May 1, 2014 at 11:24
i dont have an array in jsp only variable

user3585120
– user3585120

2014-05-01 11:27:24 +00:00
Commented May 1, 2014 at 11:27 — user3585120
– user3585120, Commented May 1, 2014 at 11:27

Rakesh KR · Accepted Answer · 2014-05-01 11:28:56Z

2

Try,

<script language="JavaScript">  
    var Arr = new Array(); 
    Arr[0] = '<%=i %>';
    Arr[1] = '<%=j %>';
    Arr[2] = '<%=k %>';
    Arr[3] = '<%=l %>';
</script>

answered May 1, 2014 at 11:28

Rakesh KR

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user3145373 ツ · Accepted Answer · 2014-05-01 11:34:30Z

2

In Java script you have to use scriplet tag to use jsp data.

<%
  Integet a = i ; //here i is your jsp variable
%>

In order to make this work you should declare the variable before using it (as always):

<%
    String myVar="blabla";
%>
<script type="text/javascript">
    foo();
    function foo() {
        var value = "<%=myVar%>";
        alert(value);
    }
</script>

Or :

var result = [];
result.push(<%i%>);
result.push(<%j%>);
result.push(<%k%>);
result.push(<%l%>);

edited May 1, 2014 at 11:34

answered May 1, 2014 at 11:27

user3145373 ツ

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Comments

Asif Bhutto · Accepted Answer · 2014-05-01 11:42:41Z

0

You can access it using JSTL.

set java variable to JSTL variable
Access it in Java script as
var x='${jstl_varialbe_goes_here }'; alert(x);

answered May 1, 2014 at 11:42

Asif Bhutto

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