java - How to correctly handle this AJAX request that send an array to a Spring MVC controller method? Why it can't work? -

i pretty new in spring mvc , have following problem trying handle ajax request send array of int controller method.

so have following situation. have jquery function:

// global , initiazilized function: var checkedrowlist = new array();  // other code inizialized checkedrowlist array here ............................................... ............................................... ...............................................  $('#validabutton').click(function() {      alert("validazione");     alert("checked rows: " + checkedrowlist.length);     alert(checkedrowlist[0]);      $.ajax({         type: "post",         data: {'checkedrowlist' : checkedrowlist},         url: "validaprogetti"     }).done(function(response) {         alert("success");      }).error(function(xhr) {         alert("error");         manageerror(xhr);     });  }); 

so checkedrowlist correctly initizialized (i checked it) , use ajax() function send toward validaprogetti resource using post request.

then controller class have method have handle previous request:

@requestmapping(value = "validaprogetti", method=requestmethod.post) public string validaprogetti(@requestparam list<integer> checkedrowlist,  model model, httpservletrequest request) {      system.out.println("numero progetti da validare: " + checkedrowlist);      return "blablabla"; } 

as can see handle http post request toward validaprogetti resource. , inside have specify requestparam list checkedrowlist retry array passed ajax request.

but don't work because when ajax request performed don't enter validaprogetti() method , shown alert("success"); popup.

why? missing? how can fix situation?

as see missed 2 things. first 1 in spring web mvc controller. don't pass requestparam requestbody.

@requestmapping(value = "validaprogetti", method=requestmethod.post) public @responsebody string validaprogetti(@requestbody list<integer> checkedrowlist) {      system.out.println("numero progetti da validare: " + checkedrowlist);      return "blablabla"; } 

the second 1 related ajax request. should send javascript array formatted json. done via function json.stringify(), converts js value json.

$('#validabutton').click(function() {      alert("validazione");     alert("checked rows: " + checkedrowlist.length);     alert(checkedrowlist[0]);      $.ajax({         type: "post",         data: json.stringify(checkedrowlist),         url: "validaprogetti",         contenttype:"application/json"     }).done(function(response) {         alert("success");      }).error(function(xhr) {         alert("error");         manageerror(xhr);     });  });