The latest version associated with "39" for the Hutool library is v5.8.39, released in June 2025.
3. The "Extra" Module and JSON: Hutool 5.8 saw significant maturation in its JSON parsing capabilities. While libraries like Jackson or Gson are industry standards, Hutool’s internal JSON parser is designed for zero-dependency convenience. The 5.8 updates improved its tolerance for malformed JSON and enhanced conversion speeds, making it viable for lightweight applications where importing a massive serialization library feels like overkill. hutool 39 new
Hutool is a lightweight Java toolkit that provides a wide set of utilities to simplify everyday development tasks (I/O, collections, date/time, crypto, HTTP, reflection, etc.). Version 3.9 continues that approach with several notable improvements, bug fixes, and additions that make common operations simpler and safer. The latest version associated with "39" for the
import cn.hutool.json.JSONObject;
Beyond AI, version 5.8.39 brings several requested "quality of life" improvements to its core modules: While libraries like Jackson or Gson are industry
2.10. BeanUtil.copyProperties() – Deep Copy with Cyclic Detection
A long-awaited fix: Hutool 39 can now copy nested objects without stack overflow from cyclic references.
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