Ajax Post请求到Servlet？

Question

Hi I have been trying to pass value from ajax to servlet ,have used JQUERY jquery-1.3.2 & query-1.3.2.min .I am successfully able to send the data but if i print the value in servlet getting null

Here is my js event

    <script type="text/javascript" src="js/jquery-1.3.2.js"></script>
    <script type="text/javascript" src="js/myjquery.js"></script>
    <script type="text/javascript" src="js/jquery-1.3.2.min.js"></script>
    <script type="text/javascript" >


    function AddNext(event)
    {
       MQA.EventManager.addListener(map, 'click', AddNext);
        var lata = event.ll.getLatitude();
        var lnga = event.ll.getLongitude();

        var latlon=lata+"|"+lnga;
        addpasslatlon(latlon);
        MQA.EventManager.clearAllListeners( map);
        exit();
      };   

myjquery.js-

    function addpasslatlon(latlon) 
    {           
           var value=latlon;
           $.ajax({
             url:'insertPos',
             type:'POST',
             data:value,
             success : function(data){
                 alert('success'+data);
             }
           });
    }

MY servlet class-

    public class InsertPos extends HttpServlet {
        private static final long serialVersionUID = 1L;


        protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException
        {
            response.setContentType("text/html;charset=UTF-8");
            PrintWriter out = response.getWriter();

            String a =request.getParameter("value");
            System.out.println(a);
        }

    }

web.xml-

    <url-pattern>/insertPos</url-pattern>

O/P- null

Answer 1

You have to send an object in data:

data:{value : value},
//----^^^^^-------------this is the key which you refered in your servlet.

and at your backend you should get it with key value as you are currently doing.