Jackson ObjectMapper DeserializationConfig.Feature.ACCEPT_EMPTY_STRING_AS_NULL_OBJECT

by

Note the javadoc of ACCEPT_EMPTY_STRING_AS_NULL_OBJECT

Feature that can be enabled to allow JSON empty String value (“”) to be bound to POJOs as null.

So an empty String can be used to map null to a POJO. A String is not a POJO, it is considered a JSON primitive value.

You cannot use that here.

ACCEPT_EMPTY_STRING_AS_NULL_OBJECT would work for something like

{"name":"First Name","phone":"","unknown":"test"}

Where you would make the TestBean.phone field of some POJO type like

class Phone {
    private String number;
}

Then deserializing would make the phone field be null.

More Related Contents:

  1. Is Jackson’s @JsonSubTypes still necessary for polymorphic deserialization?
  2. Can not deserialize instance of java.util.ArrayList out of VALUE_STRING
  3. Ignoring new fields on JSON objects using Jackson [duplicate]
  4. Only using @JsonIgnore during serialization, but not deserialization
  5. How can I include raw JSON in an object using Jackson?
  6. Jackson Vs. Gson [closed]
  7. Jackson and generic type reference
  8. How to deserialise a subclass in Firebase using getValue(Subclass.class)
  9. Serializing with Jackson (JSON) – getting “No serializer found”?
  10. Convert JSON String to Pretty Print JSON output using Jackson
  11. Why when a constructor is annotated with @JsonCreator, its arguments must be annotated with @JsonProperty?
  12. directly convert CSV file to JSON file using the Jackson library
  13. How can I tell jackson to ignore a property for which I don’t have control over the source code?
  14. Java: Jackson polymorphic JSON deserialization of an object with an interface property?
  15. How do I obtain the Jackson ObjectMapper in use by Spring 4.1?
  16. Jackson JSON field mapping capitalization?
  17. Strange Jackson exception being thrown when serializing Hibernate object
  18. Jackson JSON library: how to instantiate a class that contains abstract fields
  19. How to access default jackson serialization in a custom serializer
  20. Jackson 3rd Party Class With No Default Constructor
  21. Merging Two JSON Documents Using Jackson
  22. Use class name as root key for JSON Jackson serialization
  23. How to deserialize a blank JSON string value to null for java.lang.String?
  24. How to compare JSON documents and return the differences with Jackson or Gson?
  25. Jackson list deserialization. nested Lists
  26. Custom Jackson Serializer for a specific type in a particular class
  27. JSON Jackson parse different keys into same field
  28. How to efficiently map a org.json.JSONObject to a POJO?
  29. Jackson JSON Deserialization: array elements in each line
  30. How to prevent null values inside a Map and null fields inside a bean from getting serialized through Jackson

Leave a Comment