加解密工具类CryptoAesUtils

public class CryptoAesUtils {

    private static final String AES = "AES";

    /**
     * 算法
     */
    private static final String ALGORITHM = "AES/ECB/PKCS5Padding";

    /**
     * 将bytes转为各种进制的字符串
     *
     * @param bytes byte[]
     * @param radix 可以转换进制的范围，从Character.MIN_RADIX到Character.MAX_RADIX，超出范围后变为10进制
     * @return String
     */
    public static String binary(byte[] bytes, int radix) {
        //1代表正数
        return new BigInteger(1, bytes).toString(radix);
    }

    /**
     * base64编码
     *
     * @param src 待编码的byte[]
     * @return 编码后的base64
     */
    public static String base64Encode(byte[] src) {
        return Base64.getEncoder().encodeToString(src);
    }

    /**
     * base64解码
     *
     * @param src 待解码的base64
     * @return 解码后的byte[]
     */
    public static byte[] base64Decode(String src) {
        return Base64.getDecoder().decode(src);
    }

    /**
     * AES加密
     *
     * @param content 加密内容
     * @param key     密钥
     * @return 加密后的byte[]
     */
    public static byte[] encryptToBytes(String content, String key) throws NoSuchAlgorithmException, NoSuchPaddingException, InvalidKeyException, UnsupportedEncodingException, BadPaddingException, IllegalBlockSizeException {
        KeyGenerator keyGenerator = KeyGenerator.getInstance(AES);
        keyGenerator.init(128);
        Cipher cipher = Cipher.getInstance(ALGORITHM);
        cipher.init(Cipher.ENCRYPT_MODE, new SecretKeySpec(key.getBytes(), AES));
        return cipher.doFinal(content.getBytes(StandardCharsets.UTF_8));
    }

    /**
     * AES加密
     *
     * @param content 加密内容
     * @param key     密钥
     * @return 加密后的String
     */
    public static String encrypt(String content, String key) throws NoSuchPaddingException, BadPaddingException, NoSuchAlgorithmException, IllegalBlockSizeException, UnsupportedEncodingException, InvalidKeyException {
        return base64Encode(encryptToBytes(content, key));
    }

    /**
     * AES解密
     *
     * @param bytes 解密的byte[]
     * @param key   密钥
     * @return 解密后的String
     */
    public static String decryptByBytes(byte[] bytes, String key) throws NoSuchAlgorithmException, NoSuchPaddingException, InvalidKeyException, BadPaddingException, IllegalBlockSizeException {
        KeyGenerator keyGenerator = KeyGenerator.getInstance(AES);
        keyGenerator.init(128);
        Cipher cipher = Cipher.getInstance(ALGORITHM);
        cipher.init(Cipher.DECRYPT_MODE, new SecretKeySpec(key.getBytes(), AES));
        byte[] decryptBytes = cipher.doFinal(bytes);
        return new String(decryptBytes);
    }

    /**
     * AES解密
     *
     * @param encryptStr 解密内容
     * @param key        密钥
     * @return 解密后的String
     */
    public static String decrypt(String encryptStr, String key) throws IllegalBlockSizeException, InvalidKeyException, BadPaddingException, NoSuchAlgorithmException, NoSuchPaddingException {
        return StringUtils.isEmpty(encryptStr) ? null : decryptByBytes(base64Decode(encryptStr), key);
    }