代码优化：日志的输出要注意级别

当前的日志级别是error

LOGGER.info("保存出错！" + user);

应该改为：

LOGGER.error("保存出错！" + user);

例1：日志级别为error

public Result resetUserPwd(User user) {
        Result rs = new Result();
        try {
            User loginUser = (User) SessionCache.get();
            user.setUpdateBy(loginUser.getUserName());
            userMapper.updateByPrimaryKeySelective(user);
        } catch (Exception e) {
            logger.error("重置密码出错-->" + e.getMessage());
            rs.setSuccess(false);
            rs.setMsg(e.getMessage());
        }
        return rs;
    }

例2：日志级别为info

if (userId == null) {
            logger.info("userId不能为空");
            return Result.operating("userId不能为空", false, ResultCode.SUCCESS);
        }