Java 实现 AES 加密及解密

AES加密及解密(请注意方法说明和方法使用)

public class AesUtil {

    static {
        Security.addProvider(new BouncyCastleProvider());
    }

    private static final String ALGORITHM = "AES/ECB/PKCS7Padding";

    /**
     * AES加密
     *
     * @param content 需加密的字符串
     * @param key     密钥
     * @return
     */
    public static byte[] encrypt(String content, String key) {
        try {

            Cipher cipher = Cipher.getInstance(ALGORITHM);
            byte[] byteContent = content.getBytes("utf-8");
            cipher.init(Cipher.ENCRYPT_MODE, new SecretKeySpec(Base64Utils.decodeFromString(key), "AES"));
            byte[] result = cipher.doFinal(byteContent);
            return result;

        } catch (NoSuchPaddingException e) {
            e.printStackTrace();
        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        } catch (InvalidKeyException e) {
            e.printStackTrace();
        } catch (IllegalBlockSizeException e) {
            e.printStackTrace();
        } catch (BadPaddingException e) {
            e.printStackTrace();
        }
        return null;
    }

    /**
     * AES解密
     *
     * @param content 加密后的字节数组
     * @param key
     * @return
     */
    public static byte[] decrypt(byte[] content, String key) {
        try {
            SecretKeySpec secretKey = new SecretKeySpec(Base64Utils.decodeFromString(key), "AES");
            Cipher cipher = Cipher.getInstance(ALGORITHM);
            cipher.init(Cipher.DECRYPT_MODE, secretKey);
            byte[] result = cipher.doFinal(content);
            return result;

        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
        } catch (NoSuchPaddingException e) {
            e.printStackTrace();
        } catch (InvalidKeyException e) {
            e.printStackTrace();
        } catch (IllegalBlockSizeException e) {
            e.printStackTrace();
        } catch (BadPaddingException e) {
            e.printStackTrace();
        }
        return null;
    }

    public static void main(String[] args) {
        // AES加密
        String crm20190608 = Base64Utils.encodeToString(AesUtil.encrypt("Crm20190608", "lRJKZnfee/7jJbuqGY0U8w=="));
        // AES解密
        String decryptres = new String(decrypt AesUtil.decrypt(Base64Utils.decodeFromString(crm20190608), "lRJKZnfee/7jJbuqGY0U8w=="));
    }

}