How do you globally set Jackson to ignore unknown properties within Spring?

Question

Jackson has annotations for ignoring unknown properties within a class using:

@JsonIgnoreProperties(ignoreUnknown = true) 

It allows you to ignore a specific property using this annotation:

@JsonIgnore

If you'd like to globally set it you can modify the object mapper:

// jackson 1.9 and before
objectMapper.configure(DeserializationConfig.Feature.FAIL_ON_UNKNOWN_PROPERTIES, false);
// or jackson 2.0
objectMapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);

How do you set this globally using spring so it can be @Autowired at server start up without writing additional classes?

Answer 1

For jackson 1.9x or below you can ignore unknown properties with object mapper provider

@Provider
@Component
public class JerseyObjectMapperProvider implements ContextResolver<ObjectMapper> {

    @Override
    public ObjectMapper getContext(Class<?> type) {

        ObjectMapper result = new ObjectMapper();
        result.configure(DeserializationConfig.Feature.FAIL_ON_UNKNOWN_PROPERTIES, false);
        return result;
    }
}

For jackson 2.x and above you can ignore unknown properties with object mapper provider

@Provider
@Component
public class JerseyObjectMapperProvider implements ContextResolver<ObjectMapper> {

    @Override
    public ObjectMapper getContext(Class<?> type) {

        ObjectMapper result = new ObjectMapper();
        result.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
        return result;
    }
}

Jersey classes are not auto-discovered by Spring. Have to register them manually.

public class JerseyConfig extends ResourceConfig {
    public JerseyConfig() {
        register(JerseyObjectMapperProvider.class);
    }
}