Ignoring new fields on JSON objects using Jackson [duplicate] Ignoring new fields on JSON objects using Jackson [duplicate] json json

Ignoring new fields on JSON objects using Jackson [duplicate]

Jackson provides an annotation that can be used on class level (JsonIgnoreProperties).

Add the following to the top of your class (not to individual methods):

@JsonIgnoreProperties(ignoreUnknown = true)public class Foo {    ...}

Depending on the jackson version you are using you would have to use a different import in the current version it is:

import com.fasterxml.jackson.annotation.JsonIgnoreProperties;

in older versions it has been:

import org.codehaus.jackson.annotate.JsonIgnoreProperties;

In addition to 2 mechanisms already mentioned, there is also global feature that can be used to suppress all failures caused by unknown (unmapped) properties:

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

This is the default used in absence of annotations, and can be convenient fallback.

Up to date and complete answer with Jackson 2

Using Annotation

import com.fasterxml.jackson.annotation.JsonIgnoreProperties;@JsonIgnoreProperties(ignoreUnknown = true)public class MyMappingClass {}

See JsonIgnoreProperties on Jackson online documentation.

Using Configuration

Less intrusive than annotation.

import com.fasterxml.jackson.databind.DeserializationFeature;import com.fasterxml.jackson.databind.ObjectMapper;import com.fasterxml.jackson.databind.ObjectReader;ObjectMapper objectMapper = new ObjectMapper();objectMapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);ObjectReader objectReader = objectMapper.reader(MyMappingClass.class);MyMappingClass myMappingClass = objectReader.readValue(json);

See FAIL_ON_UNKNOWN_PROPERTIES on Jackson online documentation.