There is such a MappingJacksonHttpMessageConverter class defined in Spring 3. I translate the project to Spring 4 at this place in spring-servlet.xml

<mvc:annotation-driven> <mvc:message-converters> <bean id="jsonConverter" class="org.springframework.http.converter.json.MappingJacksonHttpMessageConverter"> </bean> </mvc:message-converters> </mvc:annotation-driven>

an error

ERROR [org.springframework.web.context.ContextLoader] (ServerService Thread Pool - 11) Context initialization failed: org.springframework.beans.factory.BeanDefinitionStoreException: Unexpected exception parsing XML document from ServletContext resource [/ WEB-INF / spring- servlet.xml]; nested exception is java.lang.NoClassDefFoundError: org / springframework / http / converter / json / MappingJacksonHttpMessageConverter

 <dependency> <groupId>org.springframework</groupId> <artifactId>spring-web</artifactId> <version>4.3.17.RELEASE</version> </dependency>

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