// Get current date as string String now = DateUtil.now(); // Parse strings easily DateTime date = DateUtil.parse("2023-10-01"); // Calculate age int age = DateUtil.age(date, DateUtil.date()); Use code with caution. Copied to clipboard 2. File Operations
Third-party library wrappers for mail, templates, and QR codes. code example
Whether you are upgrading from an or integrating it into a fresh deployment? Share public link
For new projects, consider (actively maintained). But for a solid, battle-tested utility library that just works , 3.9 remains a hidden gem.
: Always ensure you are using the latest stable version (currently in the 5.x range) to benefit from the latest security patches and performance improvements. Conclusion hutool 39
import cn.hutool.core.bean.BeanUtil; public class ProductionDemo public static void main(String[] args) UserDTO userDTO = new UserDTO("Alex Dev", "dev@example.com", 29); // Deep copy properties from DTO to Entity instantly UserEntity userEntity = new UserEntity(); BeanUtil.copyProperties(userDTO, userEntity); System.out.println("Mapped Name: " + userEntity.getName()); Use code with caution. 2. Fluent, Boilerplate-Free HTTP Requests
// ObjectId (MongoDB style) String objectId = IdUtil.objectId();
By upgrading to , you gain access to a more robust, AI-ready toolkit that minimizes bugs by using pre-tested, high-quality community-driven code. Central Repository: cn/hutool/hutool-system/5.8.39
This is the standout feature of this release. The hutool-ai module is designed to be a unified API for interacting with various large language models (LLMs). With it, developers can effortlessly switch between multiple AI services without needing to learn different SDKs. As of this release, it supports major models like DeepSeek, OpenAI, Grok, and ByteDance's Doubao . // Get current date as string String now = DateUtil
As of its recent stable release, (released June 2025) continues to serve as a comprehensive "Swiss Army Knife" for Java development. By encapsulating complex logic into simple static methods, it reduces the cost of learning APIs and makes Java feel as elegant as a functional language. What’s New in Hutool 5.8.39?
NumberUtil.isNumber(CharSequence str) : Validates if a string represents a valid number.
Kai was a software tinkerer by trade, though he’d been slipping into other trades lately: reverse-engineering, firmware archaeology, bartering rare modules to pay rent. He set the device on a bench beside his terminal and booted an old laptop, half-expecting nothing to happen. The dial flickered once, showing a precise green pulse that matched the heartbeat of his monitor.
This release expanded Hutool's reach into generative AI while continuing to refine its massive collection of "util" packages. Expanded AI Capabilities New HutoolAI Platform code example Whether you are upgrading from an
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// Convert strings to primitives safely int num = Convert.toInt("123", 0); Date d = Convert.toDate("2021-12-01"); String[] arr = Convert.toStrArray("[a, b, c]");
: If you only need the Date utilities, only import hutool-core rather than the entire library suite to keep your dependencies lean.
A lightweight HTTP client capable of processing RESTful API queries and complex multi-part form file uploads without external dependencies.
Provides quick validation and conversion helpers for primitive char data types.