How to Deserialize Arrays or Lists of Objects with Jackson?

Deserializing Arrays of Objects with Jackson

Jackson, a popular data binding library, provides the ability to deserialize arrays of objects, offering flexibility in data handling. Here's how to approach this:

Creating a Mapper

As a first step, create an object mapper using the ObjectMapper class:

import com.fasterxml.jackson.databind.ObjectMapper; // in Play 2.3
ObjectMapper mapper = new ObjectMapper();

Deserializing as an Array

To deserialize an array of objects, specify the array type:

MyClass[] myObjects = mapper.readValue(jsonInput, MyClass[].class);

Deserializing as a List

If you prefer to deserialize as a list, there are several options:

Type Reference Method:

List<MyClass> myObjects = mapper.readValue(jsonInput, new TypeReference<List<MyClass>>() {});

Constructing Collection Type:

List<MyClass> myObjects = mapper.readValue(jsonInput, mapper.getTypeFactory().constructCollectionType(List.class, MyClass.class));

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