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>