@JsonIgnoreProperties(ignoreUnknown=false) is not working in Spring 4.2.0 and upper version

@JsonIgnoreProperties(ignoreUnknown=false) is not working with spring 4.2.0 and upper version of spring. But it is working with 4.0.4 and 4.0.1 . I am using spring 4.2.8 and Jackson dependencies are used

<dependency> <groupId>com.fasterxml.jackson.core</groupId> <artifactId>jackson-databind</artifactId> <version>2.6.3</version> </dependency> <dependency> <groupId>com.fasterxml.jackson.core</groupId> <artifactId>jackson-core</artifactId> <version>2.6.3</version> </dependency> <dependency> <groupId>com.fasterxml.jackson.core</groupId> <artifactId>jackson-annotations</artifactId> <version>2.6.3</version> </dependency>

If I send json request with invalid fields then it is accepting as a valid request. But it should give the bad request as response. For example: If I have class

public class Student{ private String id; private String name; }

If send valid corresponding json request it should be like

{ "id": "123", "name": "test" }

But even if I send json request with invalid fields like below it is still accepting.

{ "id": "123", "name": "test", "anyinvalidkey": "test" }

But it should give the bad request as response


An annotation based solution to the based on the answer from Aarya can done in the following way:

@Configuration public class Config implements InitializingBean { @Autowired private RequestMappingHandlerAdapter converter; @Override public void afterPropertiesSet() throws Exception { configureJacksonToFailOnUnknownProperties(); } private void configureJacksonToFailOnUnknownProperties() { MappingJackson2HttpMessageConverter httpMessageConverter = converter.getMessageConverters().stream() .filter(mc -> mc.getClass().equals(MappingJackson2HttpMessageConverter.class)) .map(mc -> (MappingJackson2HttpMessageConverter)mc) .findFirst() .get(); httpMessageConverter.getObjectMapper().enable(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES); } }


This is happening because the HttpMessageConverter provided by the earlier versions of spring were using ObjectMapper default configuration. But the newer versions of spring use Jackson2ObjectMapperBulider which has DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES property set to false by default. (Reference link). You can solve this issue by adding the following in your applicationContext.xml:

<bean id="jacksonObjectMapper" class="com.fasterxml.jackson.databind.ObjectMapper" /> <mvc:annotation-driven content-negotiation-manager="contentNegotiationManager"> <mvc:message-converters> <bean class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter"> <property name="objectMapper" ref="jacksonObjectMapper" /> </bean> </mvc:message-converters> </mvc:annotation-driven> <bean id="contentNegotiationManager" class="org.springframework.web.accept.ContentNegotiationManagerFactoryBean"> <property name="favorPathExtension" value="false" /> <property name="mediaTypes"> <value> json=application/json </value> </property> </bean>


@Aarya's answer did not work for me right out of box, but gave me a great hint to look around. So this is what works for me. Given that my Spring is 4.3.12.RELEASE and jackson is 2.9.2

<mvc:annotation-driven> <mvc:message-converters> <bean class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter"> <property name="objectMapper"> <bean class="com.fasterxml.jackson.databind.ObjectMapper" /> </property> </bean> </mvc:message-converters> </mvc:annotation-driven>


Easy annotation driven solution. In a @Configuration:

@Bean @Primary public ObjectMapper objectMapper(Jackson2ObjectMapperBuilder builder) { ObjectMapper objectMapper = builder.createXmlMapper(false).build(); objectMapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, true); return objectMapper; }


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