set value for java variable from javascript function

Question

I have a aui select field(drop-down), & I want to perform some operation if drop-down option changes.

So my aui select field shows like this:

<form action="<liferay-portlet:actionURL name="saveInfo" />"

    <aui:select name="selectAmount" inlineLabel="true" label="select-amount" onChange="performOperationsOnInputField()">
        <aui:option value="0"></aui:option>
        <aui:option value="1">1</aui:option>
        <aui:option value="2">2</aui:option>
        <aui:option value="3">3</aui:option>
        <aui:option value="4">4</aui:option>
        <aui:option value="5">5</aui:option>
    </aui:select>

</form>

and script is :

<script type="text/javascript">
     function performOperationsOnInputField() {
         var portletNamespace = '<portlet:namespace />';
         var selectedValue = $('#selectAmount').val();

         if(selectedValue == '0') {
            // set a java variable value which can be access fro any java file(like static variable) or any best way so that we can access it from any java/jsp file

            });                   
        } 
    }
</script>

Can we set a java variable value from script so that we can access value of this fields globally from any java file & from any jsp page?

Suresh Atta · Accepted Answer · 2013-10-15 06:44:16Z

1

// set a java variable value which can be access fro any java file(like static variable) or any best way so that we can access it from any java/jsp file

No you cannot.

You might misunderstand that JSP and JavaScript existed on same document. Yes but JSP part compiles on server side itself comes to client.

Javascript Plays on client side and JSP plays on server side.

What you need to do is you have to make a server request. And send that string as a query parameter or form or Ajax.

edited Oct 15, 2013 at 6:44

answered Oct 15, 2013 at 6:28

Suresh Atta

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Comments

Mrigank Kishore Varma · Accepted Answer · 2013-10-22 13:35:29Z

0

doing an ajax based call to server will pass your data from java-script to java.

answered Oct 22, 2013 at 13:35

Mrigank Kishore Varma

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Pankaj Tiwari · Accepted Answer · 2013-10-22 13:43:21Z

0

You can use ajax based call and can pass the values by appending into queryString

answered Oct 22, 2013 at 13:43

Pankaj Tiwari

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