pass a javascript variable to a java servlet? [duplicate]

Question

I want to pass a javascript variable to a java servlet. I am developing a web application. This is my html code:

<p id="test">Some text</p>

And this is what i write in the javascript file:

var myVar = document.getElementById('test').innerText;

$.ajax({
url: 'Test',
data: {
    myPostVar: myVar
},
type: 'POST'
});

And then this in the servlet (in the doGet):

String result = request.getParameter("myPostVar");
System.out.print(result);

And if i run the Test.java to test, it gives me "null". I googled too much but could not find any solution.

Same question as this stackoverflow.com/questions/28100431/… , didnt you get the answer — Santhosh
– Santhosh, Commented Jan 23, 2015 at 8:53
Anyway you have to submit the form. Better make an AJAX POST call and on servlet get the parameter. Same as mentioned by San. — Vaibs
– Vaibs, Commented Jan 23, 2015 at 9:07
No i did not get the answer. maybe you know some other solution that could work — user2959870
– user2959870, Commented Jan 23, 2015 at 9:09
Use this into your javascript window.location.href = 'url?parameter=' + myval — Alist3r
– Alist3r, Commented Jan 28, 2015 at 10:08

Mauricio Fabian · Accepted Answer · 2015-01-23 09:08:35Z

0

You use doGet instead of doPost

type: 'POST'

Change it to GET or use doPost in your Java project

answered Jan 23, 2015 at 9:08

Mauricio Fabian

1

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2 Comments

user2959870 Over a year ago

i tried that, but did not work

Gimby Over a year ago

Which of the two suggestions did you exactly try? You should change the servlet to doPost(). Parameters in a GET request are passed in the url, not in the request body.

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