SprintBoot错误解决办法（一）

Whitelabel Error Page

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

Mon Dec 09 12:21:15 CST 2024

There was an unexpected error (type=Internal Server Error, status=500).

IDEA出现下列错误：

Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is org.springframework.http.converter.HttpMessageConversionException: Type definition error: [simple type, class com.lsj.sbv_wms.entity.User]; nested exception is com.fasterxml.jackson.databind.exc.InvalidDefinitionException: No serializer found for class com.lsj.sbv_wms.entity.User and no properties discovered to create BeanSerializer (to avoid exception, disable SerializationFeature.FAIL_ON_EMPTY_BEANS) (through reference chain: java.util.ArrayList[0])] with root cause

com.fasterxml.jackson.databind.exc.InvalidDefinitionExcepti