org.codehaus.jackson.map.JsonMappingException: No serializer found for class org.springframework.validation.DefaultMessageCodesResolver and no properties discovered to create BeanSerializer (to avoid exception, disable SerializationConfig.Feature.FAIL_ON_EMPTY_BEANS) ) (through reference chain: org.springframework.validation.support.BindingAwareModelMap["org.springframework.validation.BindingResult.staff"]->org.springframework.validation.BeanPropertyBindingResult["messageCodesResolver"]) org.codehaus.jackson.map.JsonMappingException:
阅读背景：
org.codehaus.jackson.map.JsonMappingException: No serializer found for class org
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