alibaba/fastjson2

Features

• JSON-to-Object Mappers - Transforms JSON strings and byte arrays into specific Java object types using class references.
• JSON Deserializers - Transforms JSON strings and byte arrays into Java objects or maps for application processing.
• Binary Deserialization - Reconstructs Java objects from binary data using embedded type information for automatic resolution.
• Binary JSON Serialization - Converts objects into an optimized binary JSON format (JSONB) to reduce payload size and increase speed.
• Binary Serialization Formats - Encodes Java objects into optimized binary formats to reduce payload size and increase processing speed.
• JSONPath Extraction - Implements a JSONPath query engine to extract specific values from documents without full deserialization.
• High-Performance JSON Encoders - Implements highly optimized encoding processes to convert data structures into JSON with minimal overhead.
• Class Instance Binary Serializers - Transforms Java objects into UTF-8 byte arrays for efficient caching and RPC communication.
• JSON Serializers - Converts Java objects into JSON strings or byte arrays for storage and network transmission.
• JSON Libraries - Provides a high-performance suite of parsing, generation, and object mapping capabilities for JSON in Java.
• JsonPath Implementations - Implements the JSONPath expression language to extract specific data and fields from JSON documents.
• Bytecode Generation - Implements high-performance object mapping by generating specialized Java bytecode at runtime to bypass reflection.
• Compact Binary Object Encoding - Provides optimized conversion of Java objects into minimized binary formats to reduce payload size.
• Class Instance Binary Serializers - Converts typed class instances to compact binary representations while preserving class information for automatic type resolution.
• Generic Map Deserialization - Transforms JSON strings into generic map structures for flexible and dynamic data access.
• Direct Memory Buffers - Utilizes direct memory buffers to write UTF-8 bytes, minimizing object allocation and garbage collection pressure.
• Object Hierarchy Querying - Evaluates JSONPath expressions against Java object hierarchies to retrieve specific data.
• Data Type Serialization Configurations - Allows configuration of serialization behavior, including null handling, formatting, and matching logic.
• Custom Serialization Interfaces - Provides dedicated reader and writer interfaces for implementing custom serialization logic for complex data types.
• Custom Serializer Implementations - Enables the creation of custom serializers by implementing dedicated reading and writing logic.
• Custom Field Mapping - Supports customizing field names, date formats, and visibility rules through class annotations.
• Schema Validators - Provides a JSON schema validator to ensure incoming data conforms to a predefined structural template.
• Token-Based Streaming Parsers - Implements token-based stream parsing to process JSON documents incrementally and reduce memory usage.
• Type-to-Schema Generation - Generates standard JSON schema formats directly from Java type definitions to share data contracts.
• Type Preservation - Maintains full type information during conversion to ensure complex objects are restored exactly as stored.
• Data Validation Schemas - Checks input JSON data against defined schemas to ensure structural correctness and type safety.
• JSON Schema Validation - Validates the integrity and presence of required fields in JSON data against a defined schema.

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