在 java 日期格式：com.fasterxml.jackson.databind.exc.InvalidDefinition.timeException：无法构造实例的`LocalDatejava.

Question

In my Java 8 code I'm trying to format string date to LocalDate format. I am using the LocalDateDeserializer.class. I get the error

com.fasterxml.jackson.databind.exc.InvalidDefinitionException: Cannot construct instance of `java.time.LocalDate` (no Creators, like default construct, exist): no String-argument constructor/factory method to deserialize from String value ('19440912').

Can any one tell me what could be the error?

Answer 1

You need to add the datetime module from jackson-modules-java8 :

Datatype module to make Jackson recognize Java 8 Date & Time API data types (JSR-310).

Register it using:

ObjectMapper mapper = new ObjectMapper();
mapper.registerModule(new JavaTimeModule());