Hutool 3.9 May 2026

// 2. StrUtil: check if string is blank String input = " Hutool 3.9 "; if (StrUtil.isNotBlank(input)) { Console.log("Trimmed: '{}'", StrUtil.trim(input)); }

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public static void main(String[] args) { // 1. DateUtil: parse and format dates String dateStr = "2024-03-09"; Date date = DateUtil.parse(dateStr); Console.log("Parsed date: {}", date); Console.log("Formatted: {}", DateUtil.formatDate(date));

public class Hutool39FeatureDemo {

import cn.hutool.core.collection.CollUtil; import cn.hutool.core.date.DateUtil; import cn.hutool.core.lang.Console; import cn.hutool.core.util.StrUtil; import cn.hutool.crypto.SecureUtil; import java.util.Date; import java.util.List;

// 3. CollUtil: safe operations on collections List<String> list = CollUtil.newArrayList("a", "b", "c"); Console.log("Join result: {}", CollUtil.join(list, "-")); public static void main(String[] args) { // 1

// 4. SecureUtil: simple MD5 String password = "admin123"; String md5Hex = SecureUtil.md5(password); Console.log("MD5 of '{}': {}", password, md5Hex); } }