在Java中使用DES进行加解密的示例DESUtil.zip

import java.util.Base64; import javax.crypto.Cipher; import javax.crypto.SecretKey; import javax.crypto.spec.SecretKeySpec; public class DESUtil { // 加密 public static String encrypt(String data, String key) throws Exception { byte[] keyBytes = getKeyBytes(key); SecretKey secretKey = new SecretKeySpec(keyBytes, "DES"); Cipher cipher = Cipher.getInstance("DES"); cipher.init(Cipher.ENCRYPT_MODE, secretKey); byte[] encryptedBytes = cipher.doFinal(data.getBytes("UTF-8")); return Base64.getEncoder().encodeToString(encryptedBytes); } // 解密 public static String decrypt(String encryptedData, String key) throws Exception { byte[] keyBytes = getKeyBytes(key); SecretKey secretKey = new SecretKeySpec(keyBytes, "DES"); Cipher cipher = Cipher.getInstance("DES"); cipher.init(Cipher.DECRYPT_MODE, secretKey); byte[] decryptedBytes = cipher.doFinal(Base64.getDecoder().decode(encryptedData)); return new String(decryptedBytes); } // 生成密钥 public static byte[] getKeyBytes(String key) throws Exception { return key.getBytes("UTF-8"); } public static void main(String[] args) { try { String key = "mySecret"; String data = "Hello World!"; // 加密 String encryptedData = encrypt(data, key); System.out.println("Encrypted Data: " + encryptedData); // 解密 String decryptedData = decrypt(encryptedData, key); System.out.println("Decrypted Data: " + decryptedData); } catch (Exception e) { e.printStackTrace(); } } }