JsonDeserialize not work for LocalDateTime

Question

I would like to send POST request from my client to my backend, and in the POJO I have two fields LocalDate and LocalDateTime as follows:

@JsonDeserialize(using = LocalDateTimeDeserializer.class)
@JsonFormat(shape = JsonFormat.Shape.STRING, pattern = "dd.MM.yyyy - hh:mm:ss")
private LocalDateTime createdTimestamp;

@JsonDeserialize(using = LocalDateDeserializer.class)
@JsonFormat(shape = JsonFormat.Shape.STRING, pattern = "dd.MM.yyyy")
private LocalDate expiredDate;

The client will send request with body like:

{
    "expiredDate" : "01.01.2020",
    "createdTimestamp" : "01.02.2020 - 10:10:10"  
}

In the backend, however, I got an exception:

java.lang.NoSuchMethodError:
com.fasterxml.jackson.databind.DeserializationContext.handleWeirdStringValue(Ljava/lang/Class;Ljava/lang/String;Ljava/lang/String;[Ljava/lang/Object;)Ljava/lang/Object;

And if I leave the createdTimestamp out of request's body then it worked. It seems that only the annotation @JsonDeserialize(using = LocalDateDeserializer.class) worked, while the @JsonDeserialize(using = LocalDateTimeDeserializer.class) did not work.

Does anyone have an idea why this happened?

You have a lowercase `h` for hours in your pattern, but there's no `a` specifying if those hours are `AM` or `PM`. That might be a problem, but I am not sure. Make the hours be uppercase `H` to describe hours in 24h-format and try again. Could work... — deHaar, Aug 27 '20 at 10:53
yes as said @deHaar your POJO properties does not match the one of your client : `createdTimestamp != createTimestamp` or is that a typo ? — Logan Wlv, Aug 27 '20 at 11:11
Sorry the createdTimestamp is my typo, the solution from deHaar worked for me. Thank you very much! — Ock, Aug 27 '20 at 11:52

score 3 · Accepted Answer · answered Aug 27 '20 at 12:16

You are using the symbol for hours in 12h format (hh) in your pattern, but the pattern is incomplete because it is missing an indicator for AM/PM, which would be an a. Leaving that indicator makes the time expression ambiguous, it could be 10 AM or 10 PM (22 in 24h-format).

You could just switch the format to 24h format (HH), which would make the time unambiguous.

Like this:

@JsonDeserialize(using = LocalDateTimeDeserializer.class)
@JsonFormat(shape = JsonFormat.Shape.STRING, pattern = "dd.MM.yyyy - HH:mm:ss")
private LocalDateTime createdTimestamp;

JsonDeserialize not work for LocalDateTime

1 Answers1