There was an unexpected error (type=Internal Server Error, status=500). Circular view path [success]

Whitelabel Error Page
This application has no explicit mapping for /error, so you are seeing this as a fallback.

Fri Feb 21 19:40:39 CST 2020
There was an unexpected error (type=Internal Server Error, status=500).
Circular view path [success]: would dispatch back to the current handler URL [/success] again. Check your ViewResolver setup! (Hint: This may be the result of an unspecified view, due to default view name generation.)
主要原因是映射地址混乱，
解决办法：在每一个方法体上面都加入@ResponseBody