Java使用Cipher.getInstance(“AES/ECB/PKCS5Padding“)；加解密算法工具类实现

public class CipherUtils {
 
  /**
   * 密钥算法
   */
  private static final String ALGORITHM = "AES";
  /**
   * 加解密算法/工作模式/填充方式
   */
  private static final String ALGORITHM_STR = "AES/ECB/PKCS5Padding";
 
  /**
   * SecretKeySpec类是KeySpec接口的实现类,用于构建秘密密钥规范
   */
  private SecretKeySpec key;
 
  public CipherUtils(String hexKey) {
    key = new SecretKeySpec(hexKey.getBytes(), ALGORITHM);
  }
 
  /**
   * AES加密
   * 
   * @param data
   * @return
   */
  public String encryptData(String data) {
    try {
      Cipher cipher = Cipher.getInstance(ALGORITHM_STR); // 创建密码器
      cipher.init(Cipher.ENCRYPT_MODE, key);// 初始化
      return new BASE64Encoder().encode(cipher.doFinal(data.getBytes("utf-8")));
    } catch (Exception e) {
      e.printStackTrace();
      return null;
    }
  }
 
  /**
   * AES解密
   * 
   * @param data
   * @return
   */
  public String decryptData(String data) {
    try {
      Cipher cipher = Cipher.getInstance(ALGORITHM_STR);
      cipher.init(Cipher.DECRYPT_MODE, key);
      return new String(cipher.doFinal(new BASE64Decoder().decodeBuffer(data)), "utf-8");
    } catch (Exception e) {
      e.printStackTrace();
      return null;
    }
  }
 
}