How to access Spring MVC model object in javascript file?

Question

I am using spring 3 MVC and i have below classes.

External system would call my application using below URL:

http://somehost/root/param1/param2/param         


        

Answer 1

in controller:

JSONObject jsonobject=new JSONObject();
jsonobject.put("error","Invalid username");
response.getWriter().write(jsonobject.toString());

in javascript:

f(data!=success){



 var errorMessage=jQuery.parseJson(data);
  alert(errorMessage.error);
}