session 放了一个List<Map<String,Object>> 怎样取值

     @RequestMapping("/usercentersava.xhtml")
    @ResponseBody
    public List<Map<String,Object>> sava(HttpServletRequest request) throws IllegalAccessException {
        UsercenterEntity usercenter=new UsercenterEntity();

        List<Map<String,Object>> list= (List<Map<String, Object>>) request.getSession().getAttribute("usercenter");

        for (Map<String, Object> stringObjectMap : list) {
            System.out.println(stringObjectMap);
        }

        return baseServiceUtil.query4list(usercenter);
    }

仿照下面代码：****

    Map map = new HashMap<String, Object>();
map.put("1", "fds");
map.put("2", "valu");
List<Map<String, Object>> list = new ArrayList<Map<String, Object>>();
list.add(map);
for (Map<String, Object> m : list)
{
  for (String k : m.keySet())
  {
    System.out.println(k + " : " + m.get(k));
  }

}