What libraries are there in Flutter for mapping JSON data to Dart objects?

In Flutter, there are several commonly used libraries for mapping JSON data to Dart objects. Here are some of these popular libraries:

1. json_serializable: This is an official library provided by the Dart team that uses annotations to generate code that interoperates with JSON. You can @JsonSerializablemark classes to be serialized/deserialized by adding annotations and generate the necessary conversion methods. This library is required to be build_runnerused with .

2. json_annotation: This is json_serializableone of the dependent libraries of , which provides annotations related to JSON serialization and deserialization. You can @JsonSerializableannotate classes to indicate that serialization/deserialization code needs to be generated.

3. dartson: This is a simple and easy-to-use library that supports mapping JSON data to Dart objects. You can @Entity()mark classes with annotations and use fromJson()and toJson()methods for transformations.

4. built_value: This is a powerful library for generating immutable Dart value types. It supports converting JSON data to and from Dart objects, and provides good support for nested and complex data structures.

These libraries all provide convenient ways to map JSON data to Dart objects, and handle the details of serialization and deserialization for you. You can choose a suitable library to process JSON data according to project requirements.