// 2. 日期处理 String now = DateUtil.now(); // 得到"2026-05-29 14:30:00" System.out.println("当前时间：" + now);
Below is an outline and key sections for a technical paper or blog post titled
: Covers everything from JSON parsing and XML handling to Cron job scheduling and HTTP clients. code example for one of these modules, or are you looking for a summary of changes compared to a later version like 5.x? openai-sdk-java/pom.xml at master - GitHub
Transitioning to a multi-module Maven structure (starting in 4.x) to allow developers to pick only what they need. Hutool 3.9
(derived from the Chinese Hu + Tool , meaning "A Tool for All") emerged as a solution to this fragmentation. Version 3.9 represents a stable iteration in the library's lifecycle where core functionalities were consolidated. This paper investigates the library's impact on code maintainability and developer efficiency, specifically analyzing its API design choices and its role in standardizing common enterprise operations.
To help refine how you use this library, could you let me know:
Version 3.9 solidified many of the core modules that developers still rely on today: hutool-core (The Heart) openai-sdk-java/pom
CollUtil 大大简化了集合的处理逻辑，统一了集合操作API，同时有效规避了NPE风险。
任何流行的开源库都可能面临安全问题，Hutool也不例外。最新版本（5.8.x）中修复了一些已知漏洞，如CVE-2025-56769（通过QLExpressEngine类可能导致远程代码执行），以及 ZipUtil 和 XmlUtil 相关的风险。
Hutool 3.9 includes a simple yet powerful HTTP client that makes RESTful API calls straightforward. This paper investigates the library's impact on code
Hutool 3.9 provides a wide range of features that make it an indispensable tool for Java developers. Some of the key features include:
Excessive try-catch blocks and manual stream closing.
Java’s native type casting can trigger unexpected ClassCastException errors. The Convert utility handles safe, intelligent type transformations across arrays, collections, and primitives.
In Hutool 3.9, the simplest way to perform a request is by using the HttpUtil.post
Hutool is a popular Java library that provides a wide range of utility functions and tools to simplify Java development. Here are some key features and updates in Hutool 3.9:
