Hutool 3.9 Upd Fixed Jun 2026

// 3. Image - QR code generation QrCodeUtil.generate("https://hutool.cn", 300, 300, FileUtil.file("qr.png"));

Enhanced handling of JSON data, providing more flexible parsing and generation tools.

import cn.hutool.core.convert.Convert; public class ConversionDemo public static void main(String[] args) String[] numericStrings = "1", "2", "3", "4" ; // Hutool instantly converts arrays without explicit looping Integer[] intArray = Convert.toIntArray(numericStrings); // Convert any value to a localized string representation smoothly String doubleStr = Convert.toStr(45.67); System.out.println("Converted Array Size: " + intArray.length); // Output: 4 Use code with caution. 2. Fluid Date Calculations

: While v3.9 established many of these core patterns, developers are now encouraged to use the v5.x branch available on the Hutool GitHub repository for better performance and support for modern Java versions. hutool/README-EN.md at v5-master - GitHub Hutool 3.9 UPD

: chinabugotech/hutool for source code and contribution. hutool/README-EN.md at v5-master - GitHub

It was a narrow bug. It only appeared on a specific OpenJDK build, on Thursdays, when the system locale was set to "zh_CN" and the moon was waxing gibbous. Well, almost. It was rare, but for the three financial companies using Hutool to process billions of transactions, it was a silent killer.

While the 5.3.9 release is about foundational utilities, modern Hutool versions have introduced significant new modules. The most notable among these is the module, which provides a unified API to interact with various large language models. This module exemplifies the toolkit's evolution to stay relevant with cutting-edge technologies. hutool/README-EN

This comprehensive technical breakdown explores both ecosystems, detailing what these updates bring to their respective development and engineering pipelines. Part 1: The Java Tool Ecosystem (Hutool 3.9.x Framework)

Hutool 3.9 UPD fixed the long-standing DateUtil.offset() timezone bug. More importantly, it added:

ImgUtil.scale( FileUtil.file("test.jpg"), FileUtil.file("scaled.jpg"), 0.5f // Scale to 50% ); Use code with caution. Scenario 3: Console Debugging it added: ImgUtil.scale( FileUtil.file("test.jpg")

: Provides advanced coding solutions via USB for various BMW infotainment features. Practical Guide for Use Hardware Connection

More granular control over connection and read timeouts.