Hutool 3.9 was a historical release in the lifecycle of the Hutool project, a popular open-source Java tool library designed to reduce the cost of learning APIs and increase productivity by providing simple static methods for common tasks. Project Philosophy

  • com.xiaoleilu.hutool.util.StrUtil#isNotBlank -> use StrUtil.isNotBlank(CharSequence)
  • Any old package names or class names moved from com.xiaoleilu.* to cn.hutool.* (update imports)

Hutool has become a go-to library for Java developers due to its: Hutool 3.9

// Excel ExcelReader reader = ExcelUtil.getReader("file.xlsx"); List<List<Object>> rows = reader.read(); Hutool 3

Hutool 3.9 May 2026

Hutool 3.9 was a historical release in the lifecycle of the Hutool project, a popular open-source Java tool library designed to reduce the cost of learning APIs and increase productivity by providing simple static methods for common tasks. Project Philosophy

Hutool has become a go-to library for Java developers due to its:

// Excel ExcelReader reader = ExcelUtil.getReader("file.xlsx"); List<List<Object>> rows = reader.read();