jackson-databind - w3toppers.com

How to provide a custom deserializer with Jackson and Spring Boot

Firstly, you need to create your custom DynamoDemoEntityDeserializer like below: class DynamoDemoEntityDeserializer extends JsonDeserializer<DynamoDemoEntity> { @Override public DynamoDemoEntity deserialize(JsonParser p, DeserializationContext ctxt) throws IOException, JsonProcessingException { // return DynamoDemoEntity instance; } } Then you can create bean of com.fasterxml.jackson.databind.Module like below: @Bean public Module dynamoDemoEntityDeserializer() { SimpleModule module = new SimpleModule(); module.addDeserializer(IDemoEntity.class, new DynamoDemoEntityDeserializer()); return … Read more

How to convert JSON string into List of Java object?

You are asking Jackson to parse a StudentList. Tell it to parse a List (of students) instead. Since List is generic you will typically use a TypeReference List<Student> participantJsonList = mapper.readValue(jsonString, new TypeReference<List<Student>>(){});

Jackson/Hibernate, meta get methods and serialization

What I usually do is map Entities to DTOs manually, or with the help of tools such as MapStruct. This will give you maximum flexibility, with a bit of overhead at the beginning, unfortunately. Over time however, you’ll see it was worth it. Jackson, GSON, and other serialization tools are obviously limited in what they … Read more