LocalDateTimeDeserialization issue-Expected array or String

[kaushik tiwari]

Hi all, I m facing LocalDateTimeDeserialization issue,gone through with various blogs but didn't found the solution which can work for me.

Added JSR310 dependency as well.

Json which I want to get deserialized is in this form: 

{"year":2018,"month":
"JULY","monthValue":7,"dayOfMonth":20,"hour":20,"minute":3,"second":33,"nano":653000000,"dayOfWeek":"FRIDAY","dayOfYear":201,"chronology":{"calendarType":"iso8601","id":"ISO"}}}  

stack trace:

Caused by: com.fasterxml.jackson.databind.exc.MismatchedInputException: Expected array or string.

 at [Source: (PushbackInputStream); line: 1, column: 1332] (through reference chain: 

com.abc.123["value"])

        at com.fasterxml.jackson.databind.exc.MismatchedInputException.from(MismatchedInputException.java:59)

        at com.fasterxml.jackson.databind.DeserializationContext.reportInputMismatch(DeserializationContext.java:1445)

        at com.fasterxml.jackson.databind.DeserializationContext.handleUnexpectedToken(DeserializationContext.java:1219)

        at com.fasterxml.jackson.databind.DeserializationContext.handleUnexpectedToken(DeserializationContext.java:1151)

        at com.fasterxml.jackson.datatype.jsr310.deser.JSR310DeserializerBase._handleUnexpectedToken(JSR310DeserializerBase.java:105)

        at com.fasterxml.jackson.datatype.jsr310.deser.LocalDateTimeDeserializer.deserialize(LocalDateTimeDeserializer.java:155)

        at com.fasterxml.jackson.datatype.jsr310.deser.LocalDateTimeDeserializer.deserialize(LocalDateTimeDeserializer.java:38)

        at com.fasterxml.jackson.databind.deser.impl.MethodProperty.deserializeAndSet(MethodProperty.java:129)

        at com.fasterxml.jackson.databind.deser.BeanDeserializer.deserializeFromObject(BeanDeserializer.java:369)

        at com.fasterxml.jackson.databind.deser.BeanDeserializer.deserialize(BeanDeserializer.java:159)

        at com.fasterxml.jackson.databind.deser.impl.MethodProperty.deserializeAndSet(MethodProperty.java:129)

        at com.fasterxml.jackson.databind.deser.BeanDeserializer.deserializeFromObject(BeanDeserializer.java:369)

        at com.fasterxml.jackson.databind.deser.BeanDeserializer.deserialize(BeanDeserializer.java:159)

        at com.fasterxml.jackson.databind.deser.impl.MethodProperty.deserializeAndSet(MethodProperty.java:129)

        at com.fasterxml.jackson.databind.deser.BeanDeserializer.deserializeFromObject(BeanDeserializer.java:369)

        at com.fasterxml.jackson.databind.deser.BeanDeserializer.deserialize(BeanDeserializer.java:159)

        at com.fasterxml.jackson.databind.deser.std.CollectionDeserializer.deserialize(CollectionDeserializer.java:286)

        at com.fasterxml.jackson.databind.deser.std.CollectionDeserializer.deserialize(CollectionDeserializer.java:245)

        at com.fasterxml.jackson.databind.deser.std.CollectionDeserializer.deserialize(CollectionDeserializer.java:27)

        at com.fasterxml.jackson.databind.deser.impl.MethodProperty.deserializeAndSet(MethodProperty.java:129)

        at com.fasterxml.jackson.databind.deser.BeanDeserializer.deserializeFromObject(BeanDeserializer.java:369)

        at com.fasterxml.jackson.databind.deser.BeanDeserializer.deserialize(BeanDeserializer.java:159)

        at com.fasterxml.jackson.databind.deser.impl.MethodProperty.deserializeAndSet(MethodProperty.java:129)

        at com.fasterxml.jackson.databind.deser.BeanDeserializer.deserializeFromObject(BeanDeserializer.java:369)

        at com.fasterxml.jackson.databind.deser.BeanDeserializer.deserialize(BeanDeserializer.java:159)

        at com.fasterxml.jackson.databind.deser.std.CollectionDeserializer.deserialize(CollectionDeserializer.java:286)

        at com.fasterxml.jackson.databind.deser.std.CollectionDeserializer.deserialize(CollectionDeserializer.java:245)

        at com.fasterxml.jackson.databind.deser.std.CollectionDeserializer.deserialize(CollectionDeserializer.java:27)

        at com.fasterxml.jackson.databind.deser.impl.MethodProperty.deserializeAndSet(MethodProperty.java:129)

        at com.fasterxml.jackson.databind.deser.BeanDeserializer.deserializeFromObject(BeanDeserializer.java:369)

        at com.fasterxml.jackson.databind.deser.BeanDeserializer.deserialize(BeanDeserializer.java:159)

        at com.fasterxml.jackson.databind.deser.impl.MethodProperty.deserializeAndSet(MethodProperty.java:129)

        at com.fasterxml.jackson.databind.deser.BeanDeserializer.deserializeFromObject(BeanDeserializer.java:369)

        at com.fasterxml.jackson.databind.deser.BeanDeserializer.deserialize(BeanDeserializer.java:159)

        at com.fasterxml.jackson.databind.deser.std.CollectionDeserializer.deserialize(CollectionDeserializer.java:286)

        at com.fasterxml.jackson.databind.deser.std.CollectionDeserializer.deserialize(CollectionDeserializer.java:245)

        at com.fasterxml.jackson.databind.deser.std.CollectionDeserializer.deserialize(CollectionDeserializer.java:27)

        at com.fasterxml.jackson.databind.deser.impl.MethodProperty.deserializeAndSet(MethodProperty.java:129)

        at com.fasterxml.jackson.databind.deser.BeanDeserializer.deserializeFromObject(BeanDeserializer.java:369)

        at com.fasterxml.jackson.databind.deser.BeanDeserializer.deserialize(BeanDeserializer.java:159)

        at com.fasterxml.jackson.databind.ObjectMapper._readMapAndClose(ObjectMapper.java:4218)

        at com.fasterxml.jackson.databind.ObjectMapper.readValue(ObjectMapper.java:3267)

        at org.springframework.http.converter.json.AbstractJackson2HttpMessageConverter.readJavaType(AbstractJackson2HttpMessageConverter.java:239)

 

[Tatu Saloranta]

On Tue, Oct 27, 2020 at 9:33 AM kaushik tiwari <kaush...@gmail.com> wrote:

Hi all, I m facing LocalDateTimeDeserialization issue,gone through with various blogs but didn't found the solution which can work for me.

Added JSR310 dependency as well.

Json which I want to get deserialized is in this form: 

{"year":2018,"month":
"JULY","monthValue":7,"dayOfMonth":20,"hour":20,"minute":3,"second":33,"nano":653000000,"dayOfWeek":"FRIDAY","dayOfYear":201,"chronology":{"calendarType":"iso8601","id":"ISO"}}} 

That is not a format that JSR-310 module supports for `LocalDateTime`, so it will not work without a custom deserializer of some kind.

It looks like someone serializing LocalDateTime without using jsr310 module, and it getting treated as POJO.

You could either write a custom JsonDeserializer or, maybe, create a POJO that maps those fields and then write code to construct matching value instance (actually that would be similar to `Converter` and `StdConvertingDeserializer` approach).

-+ Tatu +-

 

[kaushik tiwari]

The default jackson serialization of LocalDateTime is the format which I had sended above, so why  it doesn't deserializing the same format. Can there be some dependency or annotations which can take care of this?

[Drew Stephens]

You'll need to add the JSR-310 module to the program that is creating that JSON.

-Drew

[kaushik tiwari]

Hi drewgs, yeah that is one option .But thing is in that I can't do anything, because that Json is coming from other service. And I can't do any manipulations in that service  .So I have to do something here only to get this LocalDateTime form  deserialized.

[Drew Stephens]

Got it, you'll have to write a custom deserializer, then:

https://www.baeldung.com/jackson-deserialization

-Drew

[kaushik tiwari]

Thanks for sharing this blog , I will try this out