des加密

/**
 * 偏移变量，固定占8位字节
 */
private final static String IV_PARAMETER = "aaaaaaaa";
/**
 * 密钥算法
 */
private static final String ALGORITHM = "DES";
/**
 * 加密/解密算法-工作模式-填充模式
 */
private static final String CIPHER_ALGORITHM = "DES/CBC/PKCS5Padding";
/**
 * 默认编码
 */
private static final String CHARSET = "utf-8";

/**
 * 生成key
 *
 * @param password
 * @return
 * @throws Exception
 */
private static Key generateKey(String password) throws Exception {
    DESKeySpec dks = new DESKeySpec(password.getBytes(CHARSET));
    SecretKeyFactory keyFactory = SecretKeyFactory.getInstance(ALGORITHM);
    return keyFactory.generateSecret(dks);
}

/**
 * DES加密字符串
 *
 * @param
 * @param data 待加密字符串
 * @return 加密后内容
 */
public  String encrypt (String data) {
    String password = "mmmmmmmm";//密码
    if (password== null || password.length() < 8) {
        throw new RuntimeException("加密失败，key不能小于8位");
    }
    if (data == null)
        return null;
    try {
        Key secretKey = generateKey(password);
        Cipher cipher = Cipher.getInstance(CIPHER_ALGORITHM);
        IvParameterSpec iv = new IvParameterSpec(IV_PARAMETER.getBytes(CHARSET));
        cipher.init(Cipher.ENCRYPT_MODE, secretKey, iv);
        byte[] bytes = cipher.doFinal(data.getBytes(CHARSET));
        System.out.println(Base64.getEncoder().encode(bytes));
        return new String(Base64.getEncoder().encode(bytes));

    } catch (Exception e) {
        e.printStackTrace();
        return data;
    }
}