jackson-modules – Tarik Billa

Jackson JSON deserialization with multiple parameters constructor

September 18, 2023 by Tarik

You need to add the annotation @JsonProperty specifying the name of the json property that needs to be passed to the constructor when creating the object. public class Cruise extends WaterVehicle { private Integer maxSpeed; @JsonCreator public Cruise(@JsonProperty(“name”) String name, @JsonProperty(“maxSpeed”)Integer maxSpeed) { super(name); System.out.println(“Cruise.Cruise”); this.maxSpeed = maxSpeed; } public Integer getMaxSpeed() { return maxSpeed; … Read more

Generate JSON schema from Java class

April 17, 2023 by Tarik

EDIT: as pointed out by commenters, module is being deprecated, not maintained. So, Caveat Emptor etc One such tool is Jackson JSON Schema module: https://github.com/FasterXML/jackson-module-jsonSchema which uses Jackson databind’s POJO introspection to traverse POJO properties, taking into account Jackson annotations, and produces a JSON Schema object, which may then be serialized as JSON or used … Read more

Is there a jackson datatype module for JDK8 java.time?

February 11, 2023 by Tarik

As already mentioned, Jackson-Datatype-JSR310 provides support for Java 8 Time. Since Jackson 2.6.0 the “old” JSR310Module is deprecated. It is replaced by JavaTimeModule. Maven dependency is the same (you can find the current version in Maven Central): <dependency> <groupId>com.fasterxml.jackson.datatype</groupId> <artifactId>jackson-datatype-jsr310</artifactId> <version>2.6.0</version> </dependency> You have to register the module like this: ObjectMapper mapper = new ObjectMapper(); … Read more