Hutool 39 ~repack~ Jun 2026

: Introduced global FetchSize settings to optimize data retrieval during large queries.

// Between long days = DateUtil.between(date1, date2, DateUnit.DAY);

: Performance profiles for XXXToMapCopier schemas have been overhauled to minimize memory overhead when mutating heavy POJOs into Java Maps.

If you are migrating from older versions (v4 or v5.0), note these changes: hutool 39

It taught a generation of coders that When you look at a piece of code written with Hutool, you don't see the plumbing; you see the intent.

ImgUtil.scale(FileUtil.file("origin.jpg"), FileUtil.file("thumb.jpg"), 0.5f);

CharUtil.isBlankChar(char c) : Identifies if a character is a space, tab, or newline. : Introduced global FetchSize settings to optimize data

// String to primitive int num = Convert.toInt("123"); long[] arr = Convert.toLongArray("1,2,3");

FileUtil.readUtf8String(File file) : Reads an entire file directly into a clean UTF-8 String.

import cn.hutool.json.JSONUtil; import cn.hutool.json.JSONObject; import cn.hutool.json.JSONArray; ImgUtil

cn.hutool hutool-all 5.8.39 Use code with caution.

A lightweight JDBC wrapper that simplifies CRUD operations and database interaction without the overhead of Hibernate or MyBatis [5].

DateUtil.parse(CharSequence dateStr) : Intelligently guesses the date format and parses it into a Date object.

对于“Hutool 39”对应的这些版本，以下是一些可以大幅提升开发效率的实用模块。

The release updates several core modules of the library to accommodate modern engineering standards.