read jquery data send from AJAX to java servlet

Question

Here is my AJAX code which triggers the Servlet 'CalculateLace'

laceTd.dblclick(function() {
    var jsonObj= { jsonObj: [ {"rowID": $(nRow).attr('id')}  ]};                                    
    $.ajax({
        data: JSON.stringify(jsonObj),
        contentType: "application/json; charset=utf-8",
        traditional: true,
        url: "CalculateLace"
    });
});

And here is my Java Servlet code:

protected void doGet(HttpServletRequest req, HttpServletResponse resp)
            throws ServletException, IOException {
      String id = req.getParameter("rowId");
      //do something
}

But I keep getting String id as null. I also tried

String id = req.getParameter("id");

but to no avail. What am I doing wrong here?

You are passing one parameter, jsonObj, an array with one object inside with one property "rowID". — Brad M
– Brad M, Commented Apr 16, 2013 at 20:09
I have been using this example: stackoverflow.com/questions/15837842/… — naddnan
– naddnan, Commented Apr 16, 2013 at 20:11
As Mike mentioned you need to decode the JSON on the servlet, in order to be able to read the attributes such as rowId . — tomor
– tomor, Commented Apr 16, 2013 at 20:14

Adil Shaikh · Accepted Answer · 2013-04-16 20:23:46Z

2

Try this way -

var jsonObj= {"rowId": $(nRow).attr('id')};

and get rowID in your servlet this way - You can get library to parse your json here JSON.org

req.getParameter("rowId");

edited Apr 16, 2013 at 20:23

answered Apr 16, 2013 at 20:17

Adil Shaikh

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1 Comment

naddnan Over a year ago

Thanks. This also worked for me: data: "rowID=" + $(nRow).attr('id'),

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