Send list with ajax to my Spring Controller

You will have to convert to the list to json if you sending via ajax, this From the spring blog itself :

$("#account").submit(function() {
    var account = $(this).serializeObject();
    $.postJSON("account", account, function(data) {
        $("#assignedId").val(data.id);
        showPopup();
    });
    return false;
});


@RequestMapping(method=RequestMethod.POST)
public @ResponseBody Map<String, ? extends Object> create(@RequestBody Account account, HttpServletResponse response) {
    Set<ConstraintViolation<Account>> failures = validator.validate(account);
    if (!failures.isEmpty()) {
        response.setStatus(HttpServletResponse.SC_BAD_REQUEST);
        return validationMessages(failures);
    } else {
        accounts.put(account.assignId(), account);
        return Collections.singletonMap("id", account.getId());
    }
}

You have to convert your list to JSON String , before using it as an AJAX parameter

This answer in SO might help

jquery ajax on client side

$.ajax({
        type: "POST",
        url: "submit",
        data:JSON.stringify(detailsArr),
        success: function(html){
          alert( "Submitted");
            }
      });

and on server side

@RequestMapping(value = "/search", method=RequestMethod.POST)
public String yourMethod(@RequestBody String body){
//convert body to array using JSONLib, FlexJSON or Gson
}