Jackson, by default, serializes java.util.Date
instances as numeric timestamps. You can configure Jackson to use a textual representation with
mapper.configure(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS, false); // it's true by default
or provide your own JsonSerializer
.
However, when you are doing the conversion, there is absolutely nothing in the intermediate JSON and in the target type, Map
, to indicate to Jackson that it should deserialize it as a Date
object. Without extra type information, Jackson will always deserialize it using its defaults (long
, double
, String
, LinkedHashMap
).
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