// Reads all lines from a UTF-8 file. Auto-closes. List<String> lines = FileUtil.readLines("config/users.txt", "UTF-8");
Handles stream operations (input/output streams, readers/writers) concisely, ensuring streams are closed correctly. 5. Encryption and Decryption ( SecureUtil ) Provides a unified interface for common algorithms. Supported: AES, DES, RSA, MD5, SHA-1. Hutool 3.9
A common question is how Hutool 3.9 compares against native language upgrades and rival toolkits. // Reads all lines from a UTF-8 file
While version 3.9 has since been succeeded by major versions like Hutool 5.x , the library's foundational tools established during the 3.x era remain central to its identity: A common question is how Hutool 3
import cn.hutool.crypto.SecureUtil; import cn.hutool.crypto.symmetric.SymmetricAlgorithm; import cn.hutool.crypto.symmetric.SymmetricCrypto; public class CryptoExample public static void main(String[] args) String secretData = "SensitiveUserPassword123"; // 1. Fast MD5 / SHA-256 Hashing String md5Hex = SecureUtil.md5(secretData); String sha256Hex = SecureUtil.sha256(secretData); // 2. AES Encryption and Decryption byte[] key = SecureUtil.generateKey(SymmetricAlgorithm.AES.getValue()).getEncoded(); SymmetricCrypto aes = SecureUtil.aes(key); // Encrypt String encryptedHex = aes.encryptHex(secretData); // Decrypt String decryptedStr = aes.decryptStr(encryptedHex); System.out.println("Decrypted Match: " + secretData.equals(decryptedStr)); Use code with caution. Module D: Lightweight HTTP Engine ( HttpUtil )