request.parameter(String) returns null when called from jquery

Question

I am developing web application.
I am sending json string from one page to another. I have used jquery to send the post data. In the target page I want to retrieve the same data. But I am getting the null value there.

my page which posts json string to page is:

$(document).ready(function () {

    $.post("./ProfileUser.jsp",{jsonData:jsonstr});
    $(location).attr('href',"./ProfileUser.jsp");
});

And in the page ProfileUser.jsp

<%
String jsonData = request.getParameter("jsonData");
String mobile;
if(jsonData == null)  mobile = "something went wrong";
else {
    JSONObject j  =new JSONObject(jsonData);
    mobile = j.getString("mobile");
}
%>

I am getting output as Something went wrong which should be mobile number from the database.
How should I get the json data in jsp?

Thank you

Rohan Kumar · Accepted Answer · 2013-08-05 05:55:26Z

1

First you need to add the third parameter as json in $.post() like,

$.post("./ProfileUser.jsp",{jsonData:jsonstr},'json');

Secondly, in JSP try it like,

JSONObject json      = new JSONObject();
if(!jsonData) {
   json.put("mobile", "111111");
}
else{
   //something;
}
response.setContentType("application/json");
response.getWriter().write(json.toString());

edited Aug 5, 2013 at 5:55

answered Aug 5, 2013 at 5:31

Rohan Kumar

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5 Comments

ajay_t Over a year ago

Thanks for your answer. Here what is the significance of response.* after the is else . I want to get data from json string in else block

Rohan Kumar Over a year ago

What is request parameter` here, response is same like request parameter=> HttpServletResponse Object

Rohan Kumar Over a year ago

Now test the above answer I've made changes in it.

ajay_t Over a year ago

I want ouput as some mobile number as 9922xxxx but i am getting 11111/"something went wrong" ,cause i am not getting json string from jquery

Rohan Kumar Over a year ago

Check by using console what goes to the server?

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