Question

This is what i’m trying to do and its pretty simple but i’m getting stuck: I’m trying to send a JSON object formed in JSP to a server side servlet and parse it .

What i’ve done till now:

• Constructed the json.
• sending the json to the backend

$.ajax({
            data: jsontosend,
            url: 'MYSERVLET?name=asdf',
            success: function(res){
                alert('posted');
            }
        })

Problem:

• What name is this JSON refrenced by so i can get it in the servlet using the request.getParameter() ?
• When i print request.getParameterNames() , i get the parameter name as the JSON string itself so the output of all parameter names inside the MYSERVLET looks like this

Parameter = name
Parameter = {"ticker":"asd","date":"asd","bucket":"300","entry":[{"type":"asd","indicator":"asd","condition":"asd"}],"exit":[{"type":"qwe","indicator":"qwe","condition":"qwe"}]}

Anyone have an idea as to what the problem is ?

Also i tried looking at this question here on stackoverflow but the same problem exists there too. Also there is a duplicate question which hasn’t been answered .

Help! 🙁

Answer 1

Read http://api.jquery.com/jQuery.ajax/#sending-data-to-server:

The data option can contain either a query string of the form
key1=value1&key2=value2, or a map of the form {key1: ‘value1’, key2:
‘value2’}. If the latter form is used, the data is converted into a
query string using jQuery.param() before it is sent.

So, you should use

$.ajax({
        data: {theNameOfTheParameter : jsontosend,
               name : 'asdf'},
        url: 'MYSERVLET',
        success: function(res){
            alert('posted');
        }
    })

and use request.getParameter("theNameOfTheParameter") to get the JSON string.