Java方式des-ecb加密和解密

StringUtil.java

	
	// des-ecb方式加密解密的key
	public static final String DES_ECB_KEY = "01234567";
/**
	 * 采用DES-ECB方式加密
	 * 
	 * @param text
	 * @return
	 */
	public static String encryptText(String text) {
		byte[] key = DES_ECB_KEY.getBytes();
		byte[] plainText = text.getBytes();

		SecretKey secretKey = new SecretKeySpec(key, "DES");
		// encrypt
		Cipher cipher = null;
		try {
			cipher = Cipher.getInstance("DES/ECB/PKCS5Padding");
		} catch (NoSuchAlgorithmException e) {
			e.printStackTrace();
		} catch (NoSuchPaddingException e) {
			e.printStackTrace();
		}
		try {
			cipher.init(Cipher.ENCRYPT_MODE, secretKey);
		} catch (InvalidKeyException e) {
			e.printStackTrace();
		}
		byte[] encryptedData = null;
		try {
			encryptedData = cipher.doFinal(plainText);
		} catch (IllegalBlockSizeException e) {
			e.printStackTrace();
		} catch (BadPaddingException e) {
			e.printStackTrace();
		}
		return Hex.encodeHexString(encryptedData);
	}

	/**
	 * 采用DES-ECB方式解密
	 * 
	 * @param text
	 * @return
	 */
	public static String decryptText(String text) {
		byte[] key = DES_ECB_KEY.getBytes();

		SecretKey secretKey = new SecretKeySpec(key, "DES");
		// encrypt
		Cipher cipher = null;
		try {
			cipher = Cipher.getInstance("DES/ECB/PKCS5Padding");
		} catch (NoSuchAlgorithmException e) {
			e.printStackTrace();
		} catch (NoSuchPaddingException e) {
			e.printStackTrace();
		}
		// decrypt
		try {
			cipher.init(Cipher.DECRYPT_MODE, secretKey);
		} catch (InvalidKeyException e) {
			e.printStackTrace();
		}
		byte[] decryptPlainText = null;
		try {
			decryptPlainText = cipher
					.doFinal(Hex.decodeHex(text.toCharArray()));
		} catch (IllegalBlockSizeException e) {
			e.printStackTrace();
		} catch (BadPaddingException e) {
			e.printStackTrace();
		} catch (DecoderException e) {
			e.printStackTrace();
		}
		return new String(decryptPlainText);
	}