List<Map<String, String>> jsonArray = new ArrayList<Map<String,String>>();
        for(TSUser tsUser:userList){
            Map<String, String> map = new HashMap<String, String>();
            map.put("id", tsUser.getId());
            map.put("name", tsUser.getRealName());
            jsonArray.add(map);
        }
        return JSON.toJSONString(jsonArray);

 function (json) {
                alert(json) 
                var obj = eval(‘(‘ + json + ‘)‘);