java - Struts2 : map which contain String and double values return null for double values -

i want know how can pass hashmap contain string , double values action javascript code ?

when edit fields double values, have null on fields, how can resolve ?

action :

 public string query() {     service = new serviceimpl();     v = new vehicule();     v= service.getbyimmat(im);     map.put("kilo", v.getkilo()); //double value     /*simpledateformat formatter5=new simpledateformat("yyyy-mm-dd");     string formats1 = formatter5.format(ss1);*/     map.put("datepicker", formats1);     map.put("etat", v.getetat());//string value     map.put("capacite_bagages", v.getcapacite_bagage()); //double value     return "success"; } 

ajax :

$.ajax({     type: 'post',      url  : "<s:url action='query'/>",     datatype : 'json',     data: { imm : selectedvalue},     success: function(result) {         $.each(result, function(key,value){              $("#"+key).val(value);          });     }); 

edit :

i want update values (string,date , double) ,for reason pass parameters map<string,object> action jsp page.

public string query() {         service = new serviceimpl();         v = new vehicule();         v= service.getbyimmat(im);         map.put("kilo", v.getkilo()); //double value         simpledateformat formatter5=new simpledateformat("yyyy-mm-dd");         string formats1 = formatter5.format(v.getdate());         map.put("datepicker", formats1);         map.put("etat", v.getetat());//string value         map.put("capacite_bagages", v.getcapacite_bagage()); //double value         return "success";     } 

i show in jsp,i edit in jsp page,but when want save result, double value take nan !! :

public string modifiervehicule () {          service = new serviceimpl();         v= new vehicule();         v = vehiculeservice.getvehiculebyimmat(immatricul);         v.setkilo((double)getkilo());         v.setdate((date)getdate());         v.setetat(getetat());         v.setcapacite_bagage((double)getcapacite_bagages());          v = service.update(v);         return "success";      } 

kilo field (double) has null value after editing, if edit integer value not have null value,

i think because public double getkilo() should return double not object pass in map !!)

edit 2 :

jsp :

<script type="text/javascript"> $(document).ready(function()      {        $('#imm').change(function()         {             var selectedvalue = $('#imm').val();             if ($.trim(selectedvalue).length > 0)               {                 $.ajax(                 {                     type: 'post',                      url  : "<s:url action='query'/>",                     datatype : 'json',                     data: { imm : selectedvalue},                     success: function(result){                                                                                                              $.each(result, function(key,value)                         {                                                       $("#"+key).val(value);                                                              } );                                     }); </script>  <s:form  cssstyle="border:0;" validate="true" action="modifiervehicule" namespace="/" > <s:select  id="imm" label="immatriculation" list="immatriculs" name="immatricul"></s:select> <s:textfield id="kilo"  name="kil" label="kilometrage" size="15" ></s:textfield> <s:textfield  id="etat" name="etat" label="etat" size="15" ></s:textfield>  <s:textfield  id="datepicker" name="date" label="date"  size="15" ></s:textfield>  <s:textfield id="capacite_bagages" name="capacite_bagages" label="capacité de bagages" size="15"></s:textfield>  <s:submit  style="height:30px; width:125px" name="valider" value="valider"></s:submit> </s:form> 

struts.xml

<action name="query" class="action.gestion" method="query">     <result name="success" type="json" >         <param name="root">map</param>      </result>  </action> 

make map map objects instead of strings. example

map<string, object> map= new hashmap<>(); 

now have put objects inside it, if value null keep value can after json result returned success handler. see how exclude properties null values json result.