While newer versions like 5.x and 6.x are now available, the 3.9 era established the foundational modules that remain the bedrock of the library:
: It was a stable choice for projects still running on older Java environments before the library's full shift to Java 8 features in version 4.x . Hutool 3.9
: Simplifies complex encryption tasks like MD5 and SHA256 with one-line methods. While newer versions like 5