Hutool 39 🎁 Secure
Hutool 5.8.39 is the latest stable release (as of June 2025) of the popular open-source Java tool library. It serves as a comprehensive "util" package alternative designed to reduce code complexity and increase development efficiency.
Hutool is built on the philosophy of making Java "sweet" by encapsulating complex underlying code into simple, elegant static methods. It covers nearly every aspect of Java development, from basic string manipulation to advanced database and network operations. Key Features in Version 5.8.39
The 5.8.39 release continues the library's trend of modularity, allowing developers to import only the components they need: hutool-all : The complete suite of tools. hutool-http : Simplifies HTTP requests and response handling. : Provides an easy-to-use database manipulation layer. hutool-extra
: Integrates third-party tools like Mail, QR codes, and Template engines. Why Use Hutool? Reduced Learning Curve
: It abstracts difficult Java APIs into intuitive methods, lowering the barrier for entry on complex tasks. Productivity
: By providing pre-built solutions for "small problems" like file I/O, date formatting, and encryption, developers can focus entirely on business logic. Low Maintenance
: Using a well-tested library reduces the risk of bugs that often occur in custom-rolled utility classes. Getting Started
To include Hutool 5.8.39 in your project, add the following dependency to your dependency >cn.hutoolhutool-all
You can find further documentation and the source code on the Hutool GitHub Repository code examples
for a specific module, such as HTTP requests or database operations? Central Repository: cn/hutool/hutool-extra/5.8.39 Central Repository: cn/hutool/hutool-extra/5.8. 39. Central Repository: cn/hutool/hutool-db/5.8.39 Central Repository: cn/hutool/hutool-db/5.8. 39. hutool-all » 5.8.39 - Maven Repository
39. Hutool是一个小而全的Java工具类库，通过静态方法封装，降低相关API的学习成本，提高工作效率，使Java拥有函数式语言般的优雅，让Java语言也可以“甜甜的”。 Maven Repository hutool/README-EN.md at v5-master - GitHub
Hutool 3.9 is a "just works" utility library. It does not chase trends but solves real Java frustrations with concise, well-tested code. If you are maintaining a Java 8 codebase and need a Swiss army knife for common tasks, Hutool 3.9 delivers without bloat.
Hutool 39, officially known as the "Hutool 39-Step Journey," represents one of the most comprehensive and community-driven roadmaps in the evolution of open-source Java utility libraries. Created as a celebration of the project’s growth, this initiative serves as both a technical checklist and a symbolic milestone for developers who seek to simplify the complexities of the Java ecosystem. By examining the 39 points of focus within the Hutool ecosystem, one can understand the broader philosophy of modern software development: reducing boilerplate code while maintaining high performance and modular flexibility.
The core essence of Hutool 39 lies in its commitment to "completeness." Java developers often struggle with the "dependency hell" that comes from importing dozens of specialized libraries for common tasks like cryptography, file manipulation, or date formatting. Hutool’s 39-step vision addresses this by consolidating these needs into a single, cohesive framework. Each step in the journey represents a refinement of a specific utility module, ensuring that the library remains lightweight enough for microservices but robust enough for enterprise-level applications. This balance is what has allowed Hutool to become a staple in the Chinese developer community and increasingly across the global landscape.
Beyond the technical specifications, Hutool 39 embodies the spirit of open-source pragmatism. The developers behind the project focus on "Humanized" code—API designs that are intuitive and readable. For instance, rather than navigating the verbose standard libraries of JDK, a Hutool user can accomplish complex network requests or Excel parsing in a single, readable line of code. The 39 steps prioritize these "sweet spots" of development, identifying the most frequent friction points in a programmer’s daily life and providing elegant, pre-tested solutions. This approach not only increases productivity but also reduces the likelihood of bugs that often creep into custom-written utility methods.
In conclusion, Hutool 39 is more than just a version update or a feature list; it is a manifesto for efficient Java development. It advocates for a world where developers spend less time reinventing the wheel and more time solving unique business problems. As the project continues to evolve through these 39 milestones, it reinforces the idea that the best tools are those that disappear into the background, providing silent, reliable support to the architects of the digital world. Through its dedication to simplicity and modularity, Hutool 39 ensures that Java remains a competitive and modern language for years to come.
The query "hutool 39" most likely refers to Hutool version 5.8.39, a release of the popular Hutool Java tool library that introduces significant AI integration and core utility enhancements.
Below is a structured "paper" (technical summary) detailing the key features and updates in this version. Technical Overview: Hutool v5.8.39 1. Introduction
Hutool is a comprehensive Java utility library designed to simplify common development tasks through static method encapsulation, reducing the complexity of standard Java APIs. Released on June 23, 2025, version 5.8.39 represents a major step forward in modernizing the library with AI-driven capabilities and performance optimizations. 2. Key Features and Enhancements AI Integration (hutool-ai)
This release focuses heavily on artificial intelligence, expanding the library's ability to interact with modern AI platforms: hutool 39
SSE Streaming: Added support for Server-Sent Events (SSE) with a callback parameter for real-time streaming responses.
New Platform Support: Integrated Grok and Doubao (ByteDance), including text-to-image and video generation support.
HutoolAI Platform: Introduction of a unified platform for AI operations within the ecosystem. Core Utility Improvements (hutool-core)
Hutool remains a "Swiss Army Knife" for Java developers, with this version adding several safety and performance features:
Data Desensitization: Added specific passport number desensitization to the DesensitizedUtil.
Performance Optimization: Enhanced the XXXToMapCopier for faster object-to-map conversions.
New Assertions: Added methods to Assert to check if collections are empty, alongside comprehensive unit test cases.
Concurrency: Added RecyclableBatchThreadPoolExecutor, a batch processing thread pool designed for high-efficiency task recycling. Database and Network Updates
Database (DB): Introduced global FetchSize settings to optimize data retrieval during large queries.
HTTP Client: The HttpConfig now allows ignoring the Content-Length header in responses, increasing flexibility for non-standard servers. 3. Usage and Implementation
Developers can integrate Hutool 5.8.39 via Maven by adding the following dependency to their pom.xml:
Version 5.8.39 solidifies Hutool's position as an essential library for Java developers by bridging the gap between traditional utility methods and modern AI requirements. Its focus on "making Java sweet" continues through its commitment to reducing boilerplate and improving developer productivity. hutool-all » 5.8.39 - Maven Repository
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
: A centralized platform for interacting with various AI models. Enhanced Stream Support parameters for SSE (Server-Sent Events) streaming returns. New Integrations
: Added text-to-image interfaces for Doubao and Grok, as well as model support for Doubao's video generation. Core Utility Enhancements Data Desensitization : Added passport number masking to DesensitizedUtil for better data privacy. Performance Optimization : Improved the performance of the XXXToMapCopier for faster object-to-map conversions. New Threading Tools : Introduced RecyclableBatchThreadPoolExecutor
, a recallable batch thread pool for more efficient resource management. Improved Assertions and HTTP Empty Collection Assertions methods to verify if a given collection is empty. Flexible HTTP Headers setIgnoreContentLength HttpConfig , allowing users to optionally ignore the contentLength header when reading responses. Database Management Global FetchSize : Added a global setting for
module to better control how many rows are fetched from the database at once. Overview of the Hutool Library
Hutool is widely used in the Java community as a "Swiss Army Knife" for developers, aiming to reduce the cost of learning complex APIs and increasing productivity by providing thousands of "out-of-the-box" methods. Core Functionality hutool-core Hutool 5
Foundational tools for collections, strings, beans, and assertions. hutool-http A lightweight HTTP client for making web requests. hutool-crypto Simplified encryption and decryption tools. hutool-json Easy-to-use JSON parsing and encapsulation. hutool-extra
Third-party library wrappers for mail, templates, and QR codes. code example
showing how to implement one of these new 5.8.39 features, such as the passport desensitization AI responses may include mistakes. Learn more hutool/README-EN.md at v5-master - GitHub
Hutool 3.9: A Comprehensive PHP Framework for Efficient Development
Hutool 3.9 is the latest version of the widely-used PHP development framework, Hutool. This framework has been a favorite among PHP developers for its simplicity, flexibility, and extensive feature set. With Hutool 3.9, developers can build robust, scalable, and maintainable applications with ease.
Key Features of Hutool 3.9
What's New in Hutool 3.9?
Benefits of Using Hutool 3.9
In conclusion, Hutool 3.9 is a powerful and feature-rich PHP framework that is well-suited for building a wide range of applications. Its modular design, improved performance, and enhanced security features make it an excellent choice for developers. Whether you're building a small web application or a large-scale enterprise system, Hutool 3.9 is definitely worth considering.
Hutool version 5.8.39 is the latest stable release of this comprehensive Java tool library, designed to simplify development by wrapping complex JDK APIs into elegant static methods. Core "Sweet" Features
Hutool is built on the philosophy of making Java "sweet" and functional-style, focusing on three main goals:
Reduced Learning Cost: It encapsulates low-level Java code (like IO, networking, and reflection) into intuitive static methods, so you don't have to memorize complex standard library patterns.
Plug-and-Play Modules: The library is modular. You can import the full suite or specific tools like hutool-crypto for encryption, hutool-http for easy web requests, or hutool-db for simplified database operations.
Zero Dependency: Most modules have no external dependencies, keeping your project's footprint small and avoiding "dependency hell". Highlighted Toolsets
Hutool-Core: The foundation, including high-performance tools for Bean manipulation, Date/Time formatting, and advanced String utilities.
Hutool-Crypto: Simplifies symmetric and asymmetric encryption (AES, RSA) and hashing (MD5, SHA) into single-line calls.
Hutool-JSON: A lightweight, fast JSON parser and serializer that integrates seamlessly with Java Beans.
Hutool-System: Provides detailed hardware and JVM information, including CPU, memory, and OS details.
For the most up-to-date documentation and examples, you can visit the Official Hutool Documentation or check the latest releases on the Hutool Maven Repository. What's New in Hutool 3
is a maintenance release of the popular Java utility library, published on June 20, 2025
. It focuses on expanding AI integration, improving core performance, and adding practical utility methods. 🤖 AI & SSE Enhancements SSE Support parameter to Server-Sent Events (SSE) streaming functions. Timeout Config : New configuration options for stream timeouts. New Interfaces : Added "Text-to-Image" (文生图) support for Video Generation : Added model support for Doubao video generation. HutoolAI Platform
: Introduction of a dedicated platform module for AI operations. 🛠️ Core & Utility Updates Desensitization DesensitizedUtil now includes a method for passport number Performance : Optimized the XXXToMapCopier for faster object-to-map conversions. Assertions
methods to verify if a collection is empty, including new unit tests. : Introduced RecyclableBatchThreadPoolExecutor for handling recyclable batch tasks. 🌐 HTTP & Database HTTP Config setIgnoreContentLength parameter to optionally ignore response length headers. now supports global settings to optimize large query performance. ⚠️ Security & Compatibility Vulnerability Checks : As of this release, tools like CVE Details
monitor this version for potential security issues; always check the latest security advisories before deployment. JDK Support : Version 5.x requires Maven Central : Available under the group ID hutool-all Full library bundle hutool-core Basic tools (Array, String, Date, etc.) hutool-http Client-side HTTP requests JDBC wrapper & SQL execution If you're using an older version, would you like a migration guide dependency snippet cn.hutool:hutool-extra 5.8.39 vulnerabilities | Snyk
If you meant version 3.9 specifically (not 4.x or 5.x), this post highlights the features that made that release line so popular.
Let’s combine multiple methods from the “Hutool 39” set to build a user import script:
public class UserImporter { public static void main(String[] args) { // #10, #11: Create and read a file FileUtil.touch("users.csv"); String csvContent = FileUtil.readUtf8String("users.csv");// #32: Parse CSV CsvReader reader = CsvUtil.getReader(); List<CsvRow> rows = reader.read(StrUtil.getReader(csvContent)); // #6, #7: Collection handling List<User> users = CollUtil.newArrayList(); for (CsvRow row : rows) if (CollUtil.isEmpty(row)) continue; // #1: Safe conversion String name = Convert.toStr(row.get(0), "Anonymous"); String birthStr = row.get(1); // #19, #22: Date parsing and age calculation DateTime birth = DateUtil.parse(birthStr); int age = DateUtil.ageOfNow(birth); // #36: Unique ID String userId = IdUtil.fastSimpleUUID(); User u = new User(userId, name, age); users.add(u); // #30: Bean copy to DTO List<UserDTO> dtos = CollUtil.newArrayList(); for (User u : users) UserDTO dto = new UserDTO(); BeanUtil.copyProperties(u, dto); dtos.add(dto); // #18: Notification via embedded server (simulated) HttpUtil.post("http://localhost:8080/api/import", BeanUtil.beanToMap(dtos)); System.out.println(StrUtil.format("Imported {} users", users.size())); }
}
This 20-line script replaces nearly 150 lines of traditional Java with BufferedReader, SimpleDateFormat, try-catch-finally, and manual JSON serialization.
While MapStruct is great for complex mappings, sometimes you just need to convert a Map to a Bean or vice versa.
// Map to Bean Map<String, Object> map = new HashMap<>(); map.put("name", "John"); map.put("age", 25);User user = BeanUtil.toBean(map, User.class);
// Bean to Map Map<String, Object> userMap = BeanUtil.beanToMap(user);
// GET String result = HttpUtil.get("https://api.example.com");
// POST form HashMap<String, Object> paramMap = new HashMap<>(); paramMap.put("key", "value"); String postResult = HttpUtil.post("https://httpbin.org/post", paramMap);
Like all Hutool versions, 3.9 adheres to the principle of "utilizing the smallest static method to accomplish complex tasks." It does not aim to replace frameworks like Spring or Guava but rather complements them by addressing everyday tasks—file operations, network requests, data conversion, and encoding—with simple, chainable utilities.
Simplifies the notoriously difficult Java Date API.
import cn.hutool.core.date.DateUtil;
import java.util.Date;
// 1. Current Date
Date now = DateUtil.date();
// 2. Parse String to Date (Auto-detect format)
Date parsedDate = DateUtil.parse("2023-10-01");
// 3. Format Date to String
String formatted = DateUtil.format(now, "yyyy/MM/dd HH:mm:ss");
// 4. Date Offset (Yesterday, Tomorrow, Offset)
Date yesterday = DateUtil.yesterday();
Date future = DateUtil.offsetDay(now, 5); // 5 days later
