関連ワード:  spring boot postmapping example    spring boot postmapping json example    spring boot restcontroller postmapping example    spring boot controller postmapping example    spring boot postmapping requestbody example    spring boot postmapping requestparam example    spring boot post mapping with parameters example    spring boot @postmapping 405 method not allowed    spring boot rest api example @postmapping    @postmapping annotation in spring boot example