ajax

  $.ajax({
                                                                            url : 'Admin_User_management?3',
                                                                            type: 'post',
                                                                            data : {id:ids},
                                                                            traditional: true,
                                                                            success : function(data) {
                                                                                //console.info(ids.join(','));
                                                                                //console.log(data)
                                                                                //datagrid.datagrid('load',data);
                                                                                //datagrid.datagrid('reload');// Return the currently selected row
                                                                            }
                                                                        })

servlet code

String[] ids = request.getParameterValues("id");//Get the passed array
        
                 JSONArray jsonData = new JSONArray();//json data
        db_admin.Admin_Del_user(ids);
        PrintWriter out = response.getWriter(); Map<String, Object> map = new
        HashMap<String, Object>(); map.put("msg", "success");
                 jsonData.fluentAdd(map); out.println(jsonData);//return data out.flush();
        out.close();

 //You can also get it like this

 //Shopping cart click to pay
    @RequestMapping("/Cart_Pay.action")
    public String Cart_Pay(HttpServletRequest request, HttpServletResponse respone) {
                 String json_data2 = request.getParameter("json_data");//Get the passed array
        List<HashMap> map = JSONArray.parseArray(json_data2, HashMap.class);
        for(HashMap<String,Object> map1:map) {
            String id = map1.get("id").toString();
            String total = map1.get("total").toString();
            System.out.println(id);
            System.out.println(total);
        }
                 //JSONArray jsonData = new JSONArray();//json data
        
        return "/Cart.jsp";
    }