java实现AES算法

private static final int BIT = 128;
	
	public static void main(String []args) {
		long start = System.nanoTime();
		AESDataTransformer des = new AESDataTransformer("811");
		StringBuffer content = new StringBuffer();
		content.append("BEGIN:VCARD");
		content.append("VERSION:2.1");
		content.append("N;ENCODING=QUOTED-PRINTABLE;CHARSET=UTF-8:;=E6=AC=A7=E9=98=B3=E9=94=8B;;;");
		content.append("FN;ENCODING=QUOTED-PRINTABLE;CHARSET=UTF-8:=E6=AC=A7=E9=98=B3=E9=94=8B");
		content.append("TEL;CELL:13163209158");
		content.append("END:VCARD");
		
		try {
//			System.out.println(StringTools.getUTF8String(des.encode(StringTools.getUTF8Bytes(content.toString()))));
			byte [] decodeContent = des.decode(des.encode(StringTools.getUTF8Bytes(content.toString())));
			System.out.println(StringTools.getUTF8String(decodeContent));
		} catch (TransformerException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		System.out.println("time=" + ((System.nanoTime() - start)/ (1000 * 1000)));
	}
	public AESDataTransformer(String key) {
		super(key);
		// TODO Auto-generated constructor stub
	}
	public AESDataTransformer(String key, String name) {
		super(key, name);
	}
	@Override
	public byte[] encode(byte[] data) throws TransformerException {
		KeyGenerator kgen;
		try {
			kgen = KeyGenerator.getInstance("AES");
			SecureRandom secureRandom = SecureRandom.getInstance("SHA1PRNG");
			secureRandom.setSeed(StringTools.getUTF8Bytes(this.key));
			kgen.init(BIT, secureRandom);
			SecretKey secretKey = kgen.generateKey();
			byte[] enCodeFormat = secretKey.getEncoded();
			SecretKeySpec key = new SecretKeySpec(enCodeFormat, "AES");
			Cipher cipher = Cipher.getInstance("AES");// ﾴﾴﾽﾨￃￜￂ￫ￆ￷
			cipher.init(Cipher.ENCRYPT_MODE, key);// ﾳ￵ￊﾼﾻﾯ
			return StringTools.getUTF8Bytes(StringTools.byte2hex(cipher.doFinal(data))); // ﾼￓￃￜ
		} catch (Exception e) {
			throw new TransformerException("Transformation error: ", e);
		}
	}
	@Override
	public String encode(String data) throws TransformerException {
		return StringTools.getUTF8String(encode(StringTools.getUTF8Bytes(data)));
	}
	@Override
	public byte[] decode(byte[] data) throws TransformerException {
		KeyGenerator kgen;
		try {
			kgen = KeyGenerator.getInstance("AES");
			SecureRandom secureRandom = SecureRandom.getInstance("SHA1PRNG");
			secureRandom.setSeed(StringTools.getUTF8Bytes(this.key));
			kgen.init(BIT, secureRandom);
			SecretKey secretKey = kgen.generateKey();
			byte[] enCodeFormat = secretKey.getEncoded();
			SecretKeySpec key = new SecretKeySpec(enCodeFormat, "AES");
			Cipher cipher = Cipher.getInstance("AES");// ﾴﾴﾽﾨￃￜￂ￫ￆ￷
			cipher.init(Cipher.DECRYPT_MODE, key);// ﾳ￵ￊﾼﾻﾯ
			return cipher.doFinal(StringTools.hex2byte(data)); // ﾽ￢ￃￜ
		} catch (Exception e) {
			throw new TransformerException("Transformation error: ", e);
		}
	}
	@Override
	public String decode(String data) throws TransformerException {
		return StringTools.getUTF8String(decode(StringTools.getUTF8Bytes(data)));
	}