alibaba/fastjsonArchived
25,625 stars·6,409 forks·Java·Apache-2.0·14 viewsgithub.com/alibaba/fastjson2/wiki/fastjson_1_upgrade_cn↗
Fastjson
Fastjson is a Java data binding framework and serialization library designed to convert objects to JSON strings and parse JSON data into typed objects. It functions as a JSON parser and stream processor capable of transforming JSON strings into data structures.
The project emphasizes high performance JSON processing and memory management, specifically through the use of a pipeline to stream oversized JSON objects and texts to prevent memory exhaustion.
It provides capabilities for JSON data serialization and deserialization workflows, including custom JSON data mapping and the ability to define specific object representations.
Features
- JSON Serialization Libraries - Provides high-performance capabilities to transform JSON strings into typed Java objects.
- JSON Data Parsers - Transforms JSON strings back into typed Java objects by mapping data structures to specific classes.
- JSON Parsers - Functions as a high-performance JSON parser capable of transforming JSON strings into data structures.
- High-Performance Parsers - Optimizes JSON processing for speed and minimal memory overhead to handle large data volumes.
- JSON - Implements streaming parsers to incrementally process oversized JSON datasets and prevent memory exhaustion.
- Memory-Efficient Streaming - Prevents application memory exhaustion by streaming oversized JSON objects and texts through a processing pipeline.
- Direct Buffer Processing - Processes large JSON datasets using direct memory buffers to minimize heap allocation and prevent memory exhaustion.
- Data Binding Frameworks - Acts as a Java data binding framework that maps JSON data to Java classes using annotations.
- Object Representation Mapping - Enables the definition of specific object representations to maintain consistent data structures during JSON conversion.
- Custom Field Mapping - Controls precisely which object fields appear in the JSON output through annotations and custom date formatting.
- Output Filtering - Allows filtering specific fields using annotations to determine exactly which data appears in the final JSON structure.
- Field Mapping Optimizations - Implements bytecode-based field mapping to avoid the performance overhead of repeated reflection calls.
- Serialization Control - Provides annotation-driven control over field visibility and output formatting during JSON serialization.
- Circular Reference Detection - Prevents infinite loops during serialization by tracking object identity hashes for self-referencing data structures.
- Generic Type Resolution - Ensures correct object instantiation for nested collections by resolving complex generic type arguments during deserialization.
- Databases and Storage - High-performance Java JSON parsing and serialization library.
- JSON - 功能完善且性能卓越的JSON处理库。
- JSON Processing - Fast JSON processor with minimal dependencies.
- Code Quality and Patterns - High-performance JSON processing library for Java.
- Java and JVM Ecosystem - Library for converting Java objects to JSON.
- ProGuard Configurations - Provides JSON parsing configuration rules.
