Hutool 3.9 __exclusive__ Jun 2026

在3.9版本中，类型转换模块通过注册转换器链和类型推断机制，支持任意类型间的智能转换。 Convert 类的使用非常便捷：

Handles null values safely and provides robust conversions between strings, numbers, dates, and collections. 2. Date and Time Management ( DateUtil )

// Quick MD5 hash generation String md5Hex = SecureUtil.md5("my_secure_password"); // Quick SHA-256 String sha256Hex = SecureUtil.sha256("my_secure_password"); // Symmetric Encryption (AES) AES aes = SecureUtil.aes(); byte[] encryptBytes = aes.encrypt("Secret Data"); String decryptStr = aes.decryptStr(encryptBytes); Use code with caution. ⚖️ Hutool 3.9 vs. Modern Hutool (5.x / 6.x) Hutool 3.9

URL url = new URL("https://example.com"); URLConnection conn = url.openConnection(); InputStream in = conn.getInputStream(); FileOutputStream out = new FileOutputStream("local_data.json"); byte[] buffer = new byte[1024]; int bytesRead; while ((bytesRead = in.read(buffer)) != -1) out.write(buffer, 0, bytesRead); out.close(); in.close(); Use code with caution.

Showcase how to handle using Hutool tools. Share public link ⚖️ Hutool 3

: General efficiency improvements across the entire utility suite to reduce overhead in high-concurrency applications. Java 11 Compatibility

如果要快速上手，也可以使用聚合包 hutool-all 引入所有模块： Share public link : General efficiency improvements across

While modern Java handles functional pipelines perfectly, it still lacks native structural methods for quick actions like regex extraction, automated formatting, or deep object cloning—areas where Hutool continues to shine. 5. Summary and Best Practices

If you are maintaining a project that requires this specific version, you can add it via Maven:

: A highly intelligent type-conversion utility. It goes far beyond standard casting, allowing seamless conversion between strings, primitives, arrays, collections, and even custom Beans without throwing standard casting exceptions.