JAVA AES加密 NoPadding的填充方式

public class AESUtil {
	// 加密
	public static byte[] Encrypt(String sSrc, String sKey) throws Exception {
		if (sKey == null) {
			System.out.print("Key爲空null");
			return null;
		}

		byte[] raw = new byte[16];
		byte[] src = new byte[16];

		if (sKey.length() == 16) {
			raw = sKey.getBytes("utf-8");
		}
		if (sKey.length() < 16 && sKey.length() > 0) {
			byte[] bytes = sKey.getBytes();
			int length = bytes.length;
			byte[] data2 = new byte[16 - length];
			raw = StringUtils.addBytes(bytes, data2);
		}
		if (sSrc.length() == 16) {
			src = sKey.getBytes("utf-8");
		}
		if (sSrc.length() < 16 && sSrc.length() > 0) {
			byte[] bytes = sSrc.getBytes();
			int length = bytes.length;
			byte[] data2 = new byte[16 - length];
			src = StringUtils.addBytes(bytes, data2);  //數組合並，主要是補齊到16位，這裏必須是16位的整數
		}

		SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES");
		Cipher cipher = Cipher.getInstance("AES/ECB/NoPadding");// "算法/模式/補碼方式"
		cipher.init(Cipher.ENCRYPT_MODE, skeySpec);
		byte[] encrypted = cipher.doFinal(src);
		return encrypted;

	}

	// 解密
	public static String Decrypt(byte[] sSrc, String sKey) throws Exception {
		try {
			if (sKey == null) {
				System.out.print("Key爲空null");
				return null;
			}

			byte[] raw = new byte[16];

			if (sKey.length() == 16) {
				raw = sKey.getBytes("utf-8");
			}
			if (sKey.length() < 16 && sKey.length() > 0) {
				byte[] bytes = sKey.getBytes();
				int length = bytes.length;
				byte[] data2 = new byte[16 - length];
				raw = StringUtils.addBytes(bytes, data2);
			}

			// byte[] raw = sKey.getBytes();
			SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES");
			Cipher cipher = Cipher.getInstance("AES/ECB/NoPadding");
			cipher.init(Cipher.DECRYPT_MODE, skeySpec);
			// byte[] encrypted1 = new Base64().decode(sSrc);// 先用base64解密

			try {
				byte[] original = cipher.doFinal(sSrc);

				return new String(original);
			} catch (Exception e) {
				System.out.println(e.toString());
				return null;
			}
		} catch (Exception ex) {
			System.out.println(ex.toString());
			return null;
		}
	}

	public static void main(String[] args) throws Exception {

		/*
		 * 此處使用AES-128-ECB加密模式，key需要爲16位。
		 */
		String cKey = "cdwzdl.cn";
		// 需要加密的字串
		String cSrc = "20191029111204";
		byte[] bytes = cSrc.getBytes();

		System.out.println(cSrc);
		// 加密
		byte[] enString = AESUtil.Encrypt(cSrc, cKey);

		byte[] hexString2Bytes = StringUtils
				.HexString2Bytes("2cb12e2aa8b2fe51f4dab67b18ac3b9a"
						.toUpperCase());
		// 解密
		String DeString = AESUtil.Decrypt(enString, cKey);
		System.out.println("解密後的字串是：" + DeString);

		String DeString111 = AESUtil.Decrypt(hexString2Bytes, cKey);
		System.out.println("解密後的字串是1111：" + DeString111);

	}