Apache Johnzon

Apache Johnzon is a lightweight and extensible Java library that provides implementations of JSON Processing (JSR-353) and JSON Binding (JSON-B) specifications. It offers a modular framework for serializing and deserializing Java objects to and from JSON, with support for RESTful services, WebSocket integration, and advanced customization through annotations and converters.

Features

• Full implementation of JSON-P 2.1 and JSON-B 3.0 specifications
• Object mapping with support for annotations like @JohnzonIgnore, @JohnzonConverter, @JohnzonProperty, and @JohnzonAny
• JAX-RS providers for seamless REST integration
• WebSocket module for JSON-based communication
• Configurable buffer strategies and encoding options
• Support for strict JSON-P compliance and custom JsonPointer behavior
• Modular architecture with core, mapper, JAX-RS, and WebSocket components

Capabilities

• Serialization and deserialization of Java objects to JSON with fine-grained control
• Custom converters and adapters for advanced data transformation
• RESTful service support via JAX-RS providers with wildcard media type handling
• Integration with Jakarta EE and TomEE environments
• Dynamic configuration of JSON mapping behavior
• Support for unknown fields and flexible access modes (field, method, strict-method, both)

Benefits

• Simplifies JSON handling in Java applications
• Reduces boilerplate code with annotation-driven mapping
• Enhances performance with optimized buffer and encoding strategies
• Enables flexible integration with REST and WebSocket APIs
• Promotes maintainability and extensibility through modular design
• Open-source and actively maintained by the Apache Software Foundation