Java使用AES加密

public class AESUtil {
 
    public static final String algorithm = "AES";
    // AES/CBC/NOPaddin
    // AES 默认模式
    // 使用CBC模式, 在初始化Cipher对象时, 需要增加参数, 初始化向量IV : IvParameterSpec iv = new
    // IvParameterSpec(key.getBytes());
    // NOPadding: 使用NOPadding模式时, 原文长度必须是8byte的整数倍
    // PKCS5Padding: 自动填充
    public static final String transformation = "AES/CBC/PKCS5Padding";
    public static final String key = "1234567812345678";
 
    /***
     * 加密
     * @param original 需要加密的参数（注意必须是16位）
     * @return
     * @throws Exception
     */
    public static String encryptByAES(String original) throws Exception {
        // 获取Cipher
        Cipher cipher = Cipher.getInstance(transformation);
        // 生成密钥
        SecretKeySpec keySpec = new SecretKeySpec(key.getBytes(), algorithm);
        // 指定模式(加密)和密钥
        // 创建初始化向量
        IvParameterSpec iv = new IvParameterSpec(key.getBytes());
        cipher.init(Cipher.ENCRYPT_MODE, keySpec, iv);
        // cipher.init(Cipher.ENCRYPT_MODE, keySpec);
        // 加密
        byte[] bytes = cipher.doFinal(original.getBytes());
 
        return encryptBASE64(bytes);
    }
 
    /**
     * 解密
     * @param encrypted 需要解密的参数
     * @return
     * @throws Exception
     */
    public static String decryptByAES(String encrypted) throws Exception {
        // 获取Cipher
        Cipher cipher = Cipher.getInstance(transformation);
        // 生成密钥
        SecretKeySpec keySpec = new SecretKeySpec(key.getBytes(), algorithm);
        // 指定模式(解密)和密钥
        // 创建初始化向量
        IvParameterSpec iv = new IvParameterSpec(key.getBytes());
        cipher.init(Cipher.DECRYPT_MODE, keySpec, iv);
        // cipher.init(Cipher.DECRYPT_MODE, keySpec);
        // 解密
 
        byte[] bytes = cipher.doFinal(decryBASE64(encrypted));
 
        return new String(bytes);
    }
 
    /***
     * BASE64解密
     * @param key
     * @return
     * @throws Exception
     */
    public static byte[] decryBASE64(String key) throws Exception{
        return (new BASE64Decoder()).decodeBuffer(key);
    }
 
    /***
     * BASE64加密
     * @param key
     * @return
     * @throws Exception
     */
    public static String encryptBASE64(byte[] key) throws Exception{
        return (new BASE64Encoder()).encode(key);
    }
 
 
}