返回状态码规范

<center> 200：获取成功</center>

<center>201：增/删/改 失败，请求参数缺失或类型有误</center>

<center>202：获取失败</center>

<center>301：验证码错误</center>

<center>401：token无效或已过期</center>

<center>402：权限不足</center>

<center>400:执行失败</center>

<center>401:token令牌相关故障</center>