Mapping Date Strings to Dates including Time with Jackson in Spring - spring

Question

I'm using Spring Boot 1.4 and the following works. I have this #Bean defined:
#Bean
public MappingJackson2HttpMessageConverter mappingJackson2HttpMessageConverter() {
ObjectMapper mapper = new ObjectMapper();
mapper.setDateFormat(new SimpleDateFormat("yyyy-MM-dd"));
mapper.registerModule(new JodaModule());
return new MappingJackson2HttpMessageConverter(mapper);
}
And I have this DTO defined:
public class ReportRequest implements Serializable {
private LocalDate startDate;
private LocalDate endDate;
// additional fields and getters/setters omitted
}
I'm submitting this data into a controller with #RequestBody ReportRequest with the following json in the body of the request:
{
"startDate": "2016-09-01",
"endDate": "2016-09-12"
}
Works great. However, I need to also include the time. So I changed everything to look like this:
mapper.setDateFormat(new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"));
private LocalDateTime startDate;
private LocalDateTime endDate;
{
"startDate": "2016-09-01 02:00:00",
"endDate": "2016-09-12 23:59:59"
}
This does not work. I'm getting:
Could not read document: Invalid format: \"2016-09-01 02:00:00\" is malformed at \" 02:00:00\" (through reference chain: com.hightouchinc.dto.ReportRequest[\"startDate\"]); nested exception is com.fasterxml.jackson.databind.JsonMappingException: Invalid format: \"2016-09-01 02:00:00\" is malformed at \" 02:00:00\" (through reference chain: com.hightouchinc.dto.ReportRequest[\"startDate\"])
Update: I modified the following:
mapper.setDateFormat(new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss"));
And can send "2016-09-01T02:00:00" and it works. But removing the T from both continues to break.

Answer 1

It doesn't appear that LocalDateTimeDeserializer respects the value passed to setDateFormat(), as can be seen in JodaModule:
addDeserializer(LocalDateTime.class, new LocalDateTimeDeserializer());
What you can do is override the default deserializer in the module before registering it:
JodaModule jodaModule = new JodaModule();
JacksonJodaDateFormat format = new JacksonJodaDateFormat("yyyy-MM-dd HH:mm:ss");
jodaModule.addDeserializer(LocalDateTime.class, new LocalDateTimeDeserializer(format)));
mapper.registerModule(jodaModule);
and that should use the correct pattern to deserialize your LocalDateTime instances.