Hutool 3.9 __top__ Jun 2026

: The methods and classes in Hutool come from years of real-world use and refinement, mitigating the risk of introducing buggy, homegrown custom util classes.

（建议按需引入）：

Hutool 3.9 is structured around the , employing static methods to provide stateless services. Its architecture can be dissected into three primary pillars: Hutool 3.9

Hutool 3.9 provides a wide range of features that make it an indispensable tool for Java developers. Some of the key features include:

If you are still on today, consider upgrading to 5.x or 6.x for: : The methods and classes in Hutool come

Developers spend less time writing custom utility classes ( DBUtil , StringUtil ) that vary across teams. This standardizes the codebase.

Before Java 8's java.time API was universally adopted across legacy projects, developers struggled with the thread-unsafe SimpleDateFormat and complex Calendar APIs. DateUtil in Hutool 3.9 offers safe, intuitive date parsing, formatting, and time-travel mathematics. Some of the key features include: If you

Hutool 3.9涵盖了你日常开发中的几乎所有需求，其丰富的功能模块库涵盖了数十个常用工具类。下面从几个最有代表性的模块来介绍：

If you are evaluating whether to stick with Hutool 3.9 or upgrade, it is vital to contrast architectural changes. Feature / Aspect Hutool 3.9 Hutool 5.x (Modern) Java 7 or higher Requires Java 8 or higher Architecture Monolithic (Single Jar) Modular (Import only what you need) Lambda Support Basic / Intermediate Deeply integrated with functional interfaces Package Names com.xiaoleilu.hutool cn.hutool The Package Namespace Shift

A lightweight JSON parsing engine. It handles conversion between Java beans, maps, and JSON strings seamlessly without dragging in heavy external libraries. 6. Hutool-db