springMVC 前台向后台传数组

前台：

$(function() {//点击播放按钮执行的事件
                            $("#button").click(function(e) {
                                alert("kaishi chuanzhi ");
                                var ids = [];
                                var i = map.size();
                                var allValue = map.values();
                                for (i; i < allValue.length; i++) {
                                ids.push(allValue[i]);
                                }
                            //  window.href="${ctx}/sitesmanage/video/form?id=${type.id}"
                            //  window.location.href = "videShowChilds.do?id=" + id;
                                $.ajax({
                                 type: 'POST',
                                 url:'${ctx}/sitesmanage/video/videoPlay',
                                 dataType : "json",
                                 data:{titles:ids},
                                  error: function (XMLHttpRequest, textStatus, errorThrown) {
                                      alert(textStatus);
                                  },
                                  success: function (data) {

                                    alert("ok");

                                  }
                              });

                            });

                        });

后台：

@RequestMapping(value = "videoPlays")
    public String videoPlays(HttpServletRequest request,
            HttpServletResponse response, ModelMap model,@RequestParam(value = "titles[]") String[] titles) {
        System.out.println(titles.length+"@@@");
        //return "modules/sitesmanage/videoPlayForm";
    return null;
    }