Hutool 3.9 [patched] Link

// String to Date (Automatic format detection) String dateStr = "2017-03-01 12:30:45"; Date parsedDate = DateUtil.parse(dateStr);

cn.hutool hutool-all 3.9.3 Use code with caution.

implementation 'cn.hutool:hutool-all:3.9.0' Hutool 3.9

Hutool 3.9, a legacy version from late 2017, established the Java library's modular, "Swiss Army Knife" approach to simplifying common development tasks like date handling, file operations, and HTTP client usage. While providing core utilities through modules like hutool-core hutool-crypto

To appreciate Hutool 3.9, we must rewind to the Java landscape of late 2018 and early 2019. JDK 11 was the new kid on the block, but the vast majority of enterprise production systems were still running on JDK 8. Maven/Gradle were standard, but modularization was a headache, not a feature. // String to Date (Automatic format detection) String

: A lightweight HTTP client that supports both GET and POST requests with simple method chaining. It handles headers, cookies, and file uploads without the overhead of heavier libraries like Apache HttpClient.

Hutool 3.9 was the pinnacle of the 3.x branch. It was battle-tested, bug-free (regarding core logic), and required zero configuration. The promise of 3.9 was simple: JDK 11 was the new kid on the

Add cn.hutool:hutool-all:3.9.0 to your project and simplify your Java life.