ajax 提交返回map集合 獲取不到值

後臺java代碼

@RequestMapping("/cameraList")
    @ResponseBody
    public Map<String, Object> cameraListForPage(@RequestParam(defaultValue = "1", value = "page") Integer page
            , @RequestParam(defaultValue = "10", value = "limit") Integer limit
            , String storageCenterId,  String startDate,String endDate) {
        Map<String, Object> parameter = new HashMap<>(16);
        parameter.put("storageCenterId", storageCenterId);
        parameter.put("page", (page - 1) * limit);
        parameter.put("limit", 99999);
        parameter.put("isExist", 1);
        Map<String, Object> map = new HashMap<>(16);
        // 統計列表條數
        List<MonitorBaseInfo> resultList = monitorBaseInfoService.getAllMonitorBaseInfoListForPage(parameter);
        // 測試
        MonitorBaseInfo m = resultList.get(0);
        String data = HikvisionUtil.getCameras(m.getLoginUsername(), m.getLoginPassword(), m.getIp(), m.getPort(), page, limit);
        String result = HikvisionUtil.getStringData(data);
        Integer countTotal = HikvisionUtil.getCountCamera(data);
        if (countTotal > 0) {
            map.put("code", 0);
            map.put("msg", "獲取視頻成功");
            map.put("count", countTotal);
            map.put("data", result);
        } else {
            map.put("code", 0);
            map.put("msg", "暫無數據");
            map.put("count", countTotal);
        }
        return map;
    }

頁面ajax代碼：

$.ajax({
		type:"get",
		url:"/monitorManage/cameraList",
		success:function(result){
			//解決數據疊加問題
			var data = JSON.parse(result);
			$('.vs-list').empty();
            var list = JSON.parse(data.data);
			list.forEach(function(item){
				console.log(item);
				var id = item.cameraUuid;
				var name = item.cameraName;
				//var videoUrl = item.videoUrl;
				//var data = item.data;
				//var time = item.time;
				//var week = item.week;
				var type = item.cameraType;
				其餘業務處理……

注意
var data = JSON.parse(result); 此處不轉json獲取不到之值，
var list = JSON.parse(data.data); 不轉json獲取不到之值，
不轉json獲取不到之值！！！

result.code or result.msg or result.data或者是
result["code"],result["msg"],result["data"]都獲取不到值。
緣由不詳，用的layui框架！