如何在Jersey JAX-RS实现中编组空字段？

Question

In a Glassfish/Jersey JAX-RS web application, how can I instruct the JSON provider (which defaults to MOXy in Jersey 2.22) to marshall null fields with JSON null value instead of skip them? I understand the use of @XmlElement(nillable = true) , but since I need it for all classes fields it would be quite cumbersome to add it everywhere.

Answer 1

You can use MOXy @XmlNullPolicy :

@XmlNullPolicy(emptyNodeRepresentsNull = true, nullRepresentationForXml = XmlMarshalNullRepresentation.EMPTY_NODE)

Taken from: https://stackoverflow.com/a/11748678/1986499 (Option #2)