Hutool 39 Patched May 2026

Yes—Hutool contains a lightweight embedded HTTP server for prototyping. Category 5: Date & Time (5 methods) 19. DateUtil.parse("2024-12-25") Parses most common date formats automatically (ISO, yyyy-MM-dd, yyyy/MM/dd).

Industry-standard password hashing with auto-salt and work factor. Category 7: Reflection & Bean Operations (4 methods) 28. BeanUtil.beanToMap(user) Convert a POJO to a Map<String, Object> , including inherited fields.

This article breaks down those 3 layers and 9 sub-modules—totaling 39 essential methods—to help you write cleaner, shorter, and more reliable Java code. Before we dive into the methods, understand the three philosophical layers that make Hutool unique. Layer 1: Type Conversion ( Convert ) Java is strongly typed, but data comes from external sources (HTTP, files, databases) as strings or objects. Convert removes the try-catch hell of SimpleDateFormat or Integer.parseInt . Layer 2: IO & File Handling ( FileUtil , IoUtil ) Working with files in raw Java requires FileInputStream , BufferedReader , and manual resource closing. Hutool reduces 10 lines of code to 1. Layer 3: Network & Tools ( HttpUtil , SecureUtil , CsvUtil ) From sending HTTP requests to generating MD5 hashes, these modules handle infrastructure-level tasks. hutool 39

Checks for null , empty string, or strings containing only whitespace (tab, space, newline). This is safer than StringUtils.isEmpty() .

Sort a list of objects by a field name using reflection—no Comparator boilerplate. Category 3: File Operations (5 methods) 10. FileUtil.touch("path/to/file.txt") Creates a file and all non-existent parent directories. Like Unix touch . Yes—Hutool contains a lightweight embedded HTTP server for

In the world of Java development, the java.util package provides the basics, but real-world projects often require 10x more boilerplate code. Enter Hutool —a tiny but powerful Java library that has been described as "the best friend of a pragmatic developer."

A lightweight alternative to String.format() with less verbosity and no positional index errors. This article breaks down those 3 layers and

Writes a collection of strings to a file, one per line.