How to use Java 8 LocalTime in RequestBody of a Spring Boot REST Endpoint

Question

I am trying to use Java 8 LocalTime as an attribute in a request object. It seems JSON parsing is not working properly and I get a HTTPStatus 400. My model object:

import java.time.LocalTime;

public class Location {
private String name;
private LocalTime openTime;
....
    }

I am using Swagger to document and use the REST apis. This is how the model object looks in Swagger.

{
 "name": "string",
"openTime": {
  "hour": 8,
  "minute": 0,
  "nano": 0,
  "second": 0
 }
}

I am using JSR310 dependency for jackson

   <dependency>
        <groupId>com.fasterxml.jackson.datatype</groupId>
        <artifactId>jackson-datatype-jsr310</artifactId>
    </dependency>

Spring Boot version is 1.5.9.RELEASE

I have the following questions:

1. How do I make the parsing work?

2. I just need hour and minute. How can I configure it?

3. How do I get more detail about the nature of the exception here. My application logs are clean. I have an RestControllerAdvice configured for exception handling, which does not handle it

   @RestControllerAdvice
   public class CustomResponseEntityExceptionHandler extends ResponseEntityExceptionHandler{
   @ExceptionHandler({ JsonMappingException.class })
   @ResponseStatus(HttpStatus.BAD_REQUEST)
     public List<ApplicationErrorDto> handle(JsonMappingException exception) {
     ApplicationErrorDto applicationErrorDto =  new ApplicationErrorDto();
     applicationErrorDto.setMessage("Request body is malformed");
     logger.info("Request body is malformed: " ,exception);
     return Arrays.asList(applicationErrorDto);
   }
   //methods for other exceptions
   }
   

   I tried following a similar link, but unable to solve it for myself so far: JSON Java 8 LocalDateTime format in Spring Boot

EDIT-1------------------------------------------------------------

I took @JBNizet's advice, returned Locatime from an controller(not an object containing LocalTime). This is what I get:

[
  13,
  42,
  38,
  550000000
]

That's my local time. Then I used the following property in application.properties

spring.jackson.serialization.write_dates_as_timestamps=false

Using the property helped me to change the localtime to a more readable format: "13:48:04.207"

However, a POST endpoint that expects a LocalTime object, is interpreted by Swagger as:

{
 "hour": 0,
 "minute": 0,
 "nano": 0,
 "second": 0
}

Using this schema to POST a LocalTime throws the same 400 error. So, I just copied the structure I was getting in my GET URL and it started working. Both of the following work:

1. "13:48:04.207"
2. "13:48"