EasyChat is a real-time chat application backend system built with Java Spring Boot. This project adopts a modern technology architecture, providing complete core features including user authentication, real-time messaging, file transfer, and more. It is designed for building high-performance instant messaging platforms.

• Spring Boot 3.2.0 - Application framework
• MyBatis 3.0.5 - Persistence framework
• MySQL 8.0.33 - Relational database

• Netty 4.1.68.Final - High-performance network communication framework
  • WebSocket server
  • Real-time message push

• Redis 3.0.0 - Caching and session management
• Redisson 3.18.0 - Redis client
  • Pub/sub message distribution
  • Advanced features like distributed locks

• FastJSON 1.2.83 - JSON serialization
• Apache Commons Lang3 3.12.0 - Common utilities
• Apache Commons Codec 1.16.0 - Encoding/decoding tools
• EasyCaptcha 1.6.2 - CAPTCHA generation
• Nashorn 15.4 - JavaScript engine

• Token-based user session management
• Custom annotation interceptors for access control
• Admin role verification mechanism

• WebSocket persistent connection management
• Channel context lifecycle management
• Redis pub/sub for multi-node message distribution
• Support for both private and group chats

• User registration and login
• Contact and friend relationship management
• Chat message persistence
• File upload and download
• Group chat creation and management

• Generic MyBatis base mapper
• Optimized XML mapper configuration

• Multi-tier Redis caching strategy
• Global exception handling
• Application startup validation
• Unified DTO design pattern

easychat/
├── src/main/
│ ├── java/ # Java source code
│ └── resources/ # Configuration files
├── pom.xml # Maven dependency configuration
└── README.md # Project documentation

The project uses Maven for build and dependency management, supporting one-click startup. For detailed configuration and startup guides, please refer to the project documentation.

This project demonstrates a typical architecture for modern Java web applications, combining the development convenience of Spring Boot, the high-performance network communication capabilities of Netty, and the distributed features of Redis. It is a complete enterprise-level instant messaging solution.