Jackson cannot parse body of a POST request

I am using Spring Boot to implement two web services, User and Book, and I am implementing the POST methods. When I send a POST request, i include the hard-coded JSON object in the HTTP Body: I am …

Nested generic types in static method

I was looking for a solution to this problem, I need to build the method so that it returns someObject, I was thinking about building something like this: public static <T, K&…

How to create Array of Objects using the Jackson Streaming API

I am trying to create a JSON using the Jackson Streaming API. I know how to create an array of elements in JSON using Jackson as we have plenty of examples related to it. But I am a bit confused about …

Spring Jackson deserialize object with reference to existing object by Id

I have three entity classes of the following: Shipments Entity: @Entity @Table(name = “SHIPMENT”) public class Shipment implements Serializable { @Id @GeneratedValue(strategy = …

Lombok returns null as a value of response

I’ve got a problem with my Api tests. When i’m trying to get data from api, lombok returns null as an acceptance value, but there are values with real numbers in api. Screenchot: https://prnt.sc/…

Restrict string data type to only string types for request body in Spring boot 2.4 (Jackson)

I have created my request POJO as follows @JsonInclude(JsonInclude.Include.NON_NULL) public class Notification { @NotNull private String clientId; private String userId; @NotNull …

Unable to find data in DTO from JSON object – parsing error ZonedDateTime

I am trying to convert the JSON timestamp object into Java I have researched converting a JSON string to java but unsure what I’m looking for. I can get it to work if the JSON uses an array but …

How to serialize a class that extends TreeSet with Jackson?

Class A looks like this: @EqualsAndHashCode(callSuper = true) @Data @AllArgsConstructor public final class A extends TreeSet { private final a; private b; private c; public …