Use a variable in javascript function inside Java code

Question

I have a javascript function as below.

<script type="text/javascript">
    window.addEventListener ("message", OnMessage, false);
    function OnMessage (event) {
        var test = event.data;
        <%
             ReadCookiesServlet readCookiesServlet=new ReadCookiesServlet();
             readCookiesServlet.doGet(<%=test%>,response);
       %>
    }
</script>

What I actually needs is to pass the value of event.data to the method doGet.How can I pass this value?

Thanks.

i guess the only way you have is to make a HTTP call to the doGet method....better if an AJAX call — Angelo Immediata, Mar 29 '15 at 15:08
`readCookiesServlet.doGet(<%=test%>,response);` wtf dude? you shouldn't call `doPost` and `doGet` servlet methods yourself. — Everv0id, Mar 29 '15 at 15:11
yep :) Just a sample code. What I need is to use javascript variable inside java code — Hasanthi, Mar 29 '15 at 15:14
So use ajax call. Something like jQuery's [`$.get`](http://api.jquery.com/jquery.get/) will do the work. — Everv0id, Mar 29 '15 at 15:20
Everv0id, Im just a newbie for ajax. Can you please help me to use ajax here — Hasanthi, Mar 29 '15 at 15:23

score 3 · Answer 1 · edited May 23 '17 at 12:30

3

You can use ajax

The problem with you approach is that the java code is compiled before any javascript function is created so it doesnt know what test and will pass <%=test%> as a string to function

Btw readCookiesServlet.doGet(<%=test%>,response); will give you a compile time error because test is not defined in java code it is defined in javascript code and also for its type.

edited May 23 '17 at 12:30

Community

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answered Mar 29 '15 at 15:09

singhakash

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@Hasanthi if you find my answer helful consider accepting it – singhakash Mar 29 '15 at 15:17
Can You please help me to write an ajax call for this – Hasanthi Mar 29 '15 at 15:20
@Hasanthi yes ufcorse check the link in my answer if you find any trouble then let me know. – singhakash Mar 29 '15 at 15:23

Use a variable in javascript function inside Java code

1 Answers1