object类型list 转为string类型list 以及数组转list

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 List<TbXyhDynamictypeFollowPO> followList=  dynamicinfoService.getDynamictypeFollow(params);
            List<String> sfollowList = new ArrayList<String>();

            List<String> resultList = new ArrayList<String>();
            for(TbXyhDynamictypeFollowPO  follow:followList){
                sfollowList.add(follow.getUserId());
            }

  String[] UserIds= msgUserIds.split("\\|");
            List<String> userList = new ArrayList<String>();
            for (int i=0;i<UserIds.length;i++)
            {
                userList.add(UserIds[i]);
            }