Error: Cannot create inner bean ‘org.springframework.http.converter.json.MappingJackson2HttpMessageConverter#0
The spring-mvc.xml configuration file is written like this
<bean class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter"> <property name="objectMapper"> <bean class="org.springframework.http.converter.json.Jackson2ObjectMapperFactoryBean"> <property name="failOnEmptyBeans" value="false"/> </bean> </property> </bean>
reason:
Only the fastjosn dependency is imported, and the following dependency is not imported
<dependency> <groupId>com.fasterxml.jackson.core</groupId> <artifactId>jackson-databind</artifactId> <version>2.12.4</version> </dependency>
These three jar packages are missing from the generated package
jackson-annotations-2.12.4.jar jackson-databind-2.12.4.jar jackson-core-2.12.4.jar
The problem is solved after importing dependencies.
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