Assigning javascript variable to java variable

Question

I know I can't use javascript variable inside java code so can anyone explain me what I can do instead?

    function init(srcc) {
<%if (session.getAttribute("status") != null && session.getAttribute("status").equals("member")) {%>
    alert(srcc + " ");
<%application.setAttribute(session.getAttribute("currentuser"), srcc);%>
<%}%>

in this line:

 <%application.setAttribute(session.getAttribute("currentuser"), srcc);%>

I can't read the srcc variable as it's assigned in javascript, this function called when I press a button in jquery, code:

var $lightbox = $("<div class='lightbox'></div>");
var $img = $("<img>");
var $caption = $("<p class='caption'></p>");
var $btn = $("<div align='center'> <INPUT TYPE='BUTTON' VALUE='Add to cart'></div>");
$lightbox.append($img).append($caption).append($btn);
$('body').append($lightbox);
$('.gallery li').click(function(e) {
    e.preventDefault();
    var src = $(this).children('img').attr("src");
    var cap = $(this).children('img').attr("alt");
    $btn.off('click').on('click', function(da) {
        $(document).ready(function() {
            init(src);
        });
    });
    $img.attr('src', src);
    $caption.text(cap);
    $lightbox.fadeIn('fast');
    $lightbox.click(function() {
        $lightbox.fadeOut('fast');
    });
});

I use it in an "add to cart" button, I want the server to keep data of whom added it to the cart and what he added. (srcc equals what he added and session.getAttribute("currentuser") is whom added). Thanks guys.

Send the variable from JavaScript to Java using an AJAX request? — leroydev
– leroydev, Commented May 31, 2016 at 15:34

leroydev · Accepted Answer · 2016-05-31 15:41:03Z

1

You can send that JavaScript variable to Java using an AJAX request

You would have to have a serverside route set up to handle this request coming in and process the sent data.

Since I already see jQuery being used in your code, I'll use this AJAX function in my example code. You can send an HTTP request without your browser reloading the page in this way:

$.get("/urlOfCartHandler/?parameterName=" + javaScriptVariableContainingDataYouWantToSend, function(data) {
    //Request was a success
}).fail(function() {
    //Request failed
});

answered May 31, 2016 at 15:41

leroydev

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