Introducing Hutool: A Comprehensive Java Utility Library

Recently a compact yet comprehensive Java utility library called Hutool has gained popularity, with nearly 14 K stars on GitHub, and it is recommended to avoid reinventing common tools.

Hutool packages a wide range of JDK functionalities—file handling, streams, encryption, encoding, regular expressions, threading, XML, etc.—into convenient utility classes, and its name combines “Hu” (a playful reference) with “tool”.

The library’s goal is to replace repetitive code snippets with single method calls, thereby reducing copy‑paste and search effort; for example, computing an MD5 hash can be done with SecureUtil.md5() instead of manually writing the algorithm.

Hutool is modular, offering components such as hutool‑aop (dynamic proxy), hutool‑bloomFilter, hutool‑cache, hutool‑core, hutool‑cron, hutool‑crypto, hutool‑db, hutool‑dfa, hutool‑extra (third‑party wrappers), hutool‑http, hutool‑log, hutool‑script, hutool‑setting, hutool‑system, hutool‑json, hutool‑captcha, hutool‑poi, and hutool‑socket.

To add Hutool to a project, include the following Maven dependency:

<dependency>
    <groupId>cn.hutool</groupId>
    <artifactId>hutool-all</artifactId>
    <version>5.3.10</version>
</dependency>

Or for Gradle:

compile 'cn.hutool:hutool-all:5.3.10'

The library is open‑source, hosted on GitHub (https://github.com/looly/hutool) with an official site at https://hutool.cn, and contributions are welcomed under a strict PR guideline.