Free: Hutool 3.9 Upd

Hutool 3.9 UPD: A Comprehensive Guide to the Game-Changing Java Utility Upgrade

Notable New Features

• Improved HTTP module:
  • Better connection pooling and timeout handling.
  • Easier SSL/TLS configuration and certificate handling.
  • More flexible request/response handling (custom serializers/deserializers).
• Excel utilities:
  • Enhanced read/write performance for large spreadsheets.
  • More robust cell type detection and styling helpers.
• JSON support:
  • Improved compatibility with multiple JSON libraries; better conversion helpers.
• Date/Time:
  • Utilities that integrate more cleanly with java.time (LocalDate, LocalDateTime, ZonedDateTime).
• Crypto and Security:
  • New helpers for commonly used digest/hmac algorithms and simplified key handling.

2. Upgrade Path: Hutool 3.x to 4.x (The "3.9" Transition)

The move from Hutool 3.x to 4.x was a breaking change. If you are upgrading legacy code, note these critical changes:

The Grand Release

The announcement echoed through Maven Central like a town crier’s bell: Hutool 3.9 UPD

Hutool 3.9 is released! New features, better performance, and cleaner APIs! Hutool 3

The developers rejoiced. They updated their pom.xml files, ran mvn clean install, and watched their tests turn green. The release was smooth. Too smooth. Improved HTTP module: