Hutool 39 New

// Assert that a collection is empty Collection myCol = new ArrayList<>(); Assert.isEmpty(myCol, "Collection must be empty!"); Use code with caution.

: Native helper methods now streamline Galois/Counter Mode (GCM) operations, simplifying nonces and authentication tags management without manual byte shifting.

| Operation | Hutool 5.x | Hutool 39 New | Improvement | |-----------|------------|--------------|--------------| | File copy (1GB) | 2.3 seconds | 1.4 seconds | | | JSON parse (10k records) | 450 ms | 310 ms | 31% faster | | AES encrypt (100MB) | 890 ms | 620 ms | 30% faster | | Thread pool startup (10k tasks) | 1.2 seconds | 0.4 sec (virtual) | 66% faster |

// Find all log files in nested directories (max depth = 5) List<File> logs = FileUtil.loopFiles(Paths.get("/var/log"), 5, path -> path.toString().endsWith(".log") && FileUtil.size(path) > 1024 ); hutool 39 new

: Enhanced data protection features, including new desensitization methods for sensitive identifiers like passport numbers in DesensitizedUtil .

| Hutool 5.x | Hutool 39 New | Action | |------------|---------------|--------| | SecureUtil.md5() | DigestUtil.md5() | MD5 moved to DigestUtil . | | CollUtil.union() | CollUtil.unionDistinct() | Union now returns duplicates; use unionAll . | | DateUtil.offset() | DateUtil.offset() (signature changed) | Now returns LocalDateTime instead of Date . | | HttpUtil.post() | HttpRequest.post().execute().body() | Sync methods deprecated; use builder pattern. |

To comply with global and localized strict data protection audits, the DesensitizedUtil core utility framework adds an integrated function. It seamlessly handles varying structural formats of international passport IDs, striking a perfect balance between debugging utility and strict data concealment. // Assert that a collection is empty Collection

The underlying FileUtil and IoUtil utilities take direct advantage of newer NIO channel advancements, lowering kernel-to-user-space copying latency. 5. Migration Strategy: Moving safely to the New Era

Hutool provides a migration guide with an automated script (in /bin/migrate-to-6.sh ).

In the bustling tech hub of Neo-Java, a senior developer named Elias sat hunched over his monitor, staring at a mountain of boilerplate code. His team was struggling with a complex integration—dates were failing, file transfers were sluggish, and the encryption logic looked like a bowl of digital spaghetti. | Hutool 5

Parsing data across web environments demands reliable data mapping. Hutool 3.9 drastically stabilizes the hutool-json module, reducing technical friction when building APIs or interacting with unstructured datastores. 1. Robust Document Processing

Incorporate the unified Bill of Materials (BOM) into your dependency management node to keep versions aligned seamlessly across the stack.

// New: Virtual threads (millions of concurrent tasks) try (var executor = ThreadUtil.newVirtualExecutor()) for (int i = 0; i < 100_000; i++) executor.submit(() -> HttpUtil.get("https://api.example.com/users"); );