swagger使用报错：No enum constant org.springframework.web.bind.annotation.RequestMethod.get

@ApiOperation(value = "xxx功能", httpMethod = "GET")

httpMethod 的值需要纯大写就可以了
我这里有一个写成了get小写形式就报错了

httpMethod可用的值

"POST",
"GET",
"PUT",
"PATCH",
"DELETE",
"HEAD",
"OPTIONS"