/**
     * AES 解密 以String密文输入,String明文输出
     * 
     * @param strMi
     *            加密后转换为base64格式的字符串
     * @param strKey
     *            加密用的Key
     * @return 解密的字符串 首先base64解密，而后在用key解密
     */
    public static String getDecString(String strMi, String strKey) {

        try {
            SecretKey secretKey = getKey(strKey);
            byte[] enCodeFormat = secretKey.getEncoded();
            SecretKeySpec key = new SecretKeySpec(enCodeFormat, "AES");
            Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding");// 创建密码器
            cipher.init(Cipher.DECRYPT_MODE, key);// 初始化
            byte[] bytes = Base64.decode(strMi);
            byte[] result = cipher.doFinal(bytes);
            String strMing = new String(result, "utf-8");

            return strMing; // 解密
        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;

    }

    /**
     * 
     * @param strKey  密钥
     * @return 安全密钥
     * 指定具体产生key的算法，跨操作系统产生 SecretKey，如果不指定，各种操作系统产生的安全key不一致。
     */
    public static SecretKey getKey(String strKey) {
        try {
            KeyGenerator _generator = KeyGenerator.getInstance("AES");
            SecureRandom secureRandom = SecureRandom.getInstance("SHA1PRNG");
            secureRandom.setSeed(strKey.getBytes());
            _generator.init(128, secureRandom);
            return _generator.generateKey();
        } catch (Exception e) {
            throw new RuntimeException("初始化密钥出现异常");
        }
    }

    /**
     * 加密以String明文输入,String密文输出
     * 
     * @param strContent
     *            待加密字符串
     * @param strKey
     *            加密用的Key
     * @return 加密后转换为base64格式字符串
     */
    public static String getEncString(String strContent, String strKey) {
        String strMi = "";
        try {
            SecretKey secretKey = getKey(strKey);
            byte[] enCodeFormat = secretKey.getEncoded();
            SecretKeySpec key = new SecretKeySpec(enCodeFormat, "AES");
            Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding");// 创建密码器
            byte[] byteContent = strContent.getBytes("utf-8");
            cipher.init(Cipher.ENCRYPT_MODE, key);// 初始化
            byte[] result = cipher.doFinal(byteContent);

            strMi = Base64.encode(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();
        } catch (Exception e) {
            e.printStackTrace();
        }
        return strMi; // 加密
    }