Allows complex file operations in a single line.
Hutool works on a "component-first" ideology. Instead of importing large, heavy dependencies, developers can choose specific micro-utilities:
Hutool is a "Swiss Army Knife" for Java developers. It was designed to reduce the need for repetitive "boilerplate" code. Instead of writing dozens of lines to read a file or send an HTTP request, Hutool allows you to accomplish these tasks with a single method call. The philosophy behind Hutool is simple: Core Modules in the 3.x Era
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 39
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String ip = ServletUtil.getClientIP(request);
Hutool 3.9 excels here, offering recursive directory deletion, file tailing (similar to Linux tail -f ), and readLines with custom callbacks—features critical for log processing and batch jobs. Allows complex file operations in a single line
// ObjectId (MongoDB style) String objectId = IdUtil.objectId();
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
// 文件读写：单行完成 FileUtil.writeString("Hello Hutool", "/tmp/test.txt", CharsetUtil.UTF_8); String content = FileUtil.readUtf8String("/tmp/test.txt"); It was designed to reduce the need for
This release also addresses a range of bugs, enhancing the overall stability of the library:
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.
import cn.hutool.core.date.DateUtil; import java.util.Date;