Hutool 3.9 Upd Updated May 2026

Hutool version 3.9 is an older release of the popular Java utility library. The Hutool project is currently maintained in v5-master, with newer releases significantly expanding its modular capabilities.

<dependency>
    <groupId>cn.hutool</groupId>
    <artifactId>hutool-all</artifactId>
    <version>3.9.UPD</version>
</dependency>

A debate erupted. Semantic versioning purists argued that .UPD wasn't valid Maven coordinates. Maven Central, in fact, rejected the UPD classifier. So Xiaohong did something radical: he hosted the .UPD artifacts on a separate CDN, signed with his personal GPG key. A banner on the official repo read: "For Maven Central, use 3.9.1. For those who want the real fix, use 3.9.UPD." Hutool 3.9 UPD

The Grand Release

The announcement echoed through Maven Central like a town crier’s bell: Hutool version 3

Enhanced Bean Tools: Improvements were made to BeanUtil, specifically regarding more flexible property copying and deep conversion between Java beans and maps. A debate erupted

The announcement went live at 3:00 AM on a Tuesday.

Hutool 3.9 UPD
Hutool 3.9 UPD