java 下的 AES javax.crypto包 加密解密算法示例

Java Aes-CBC加密，用JAVA原生的lib做的加密解密示例，这里需要注意的是，加密的结果需要转换一下格式

//    private static String sKey="123456";
	private static final byte[] INIT_VECTOR = { 0x31, 0x37, 0x36, 0x35, 
                                                0x34, 0x33, 0x32, 0x31, 
                                                0x38, 0x27, 0x36, 0x35, 
                                                0x33, 0x23, 0x32, 0x33 };

    public static String encrypt(String sSrc, String sKey) throws Exception {
        Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
        byte[] raw = sKey.getBytes();
        SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES");
        IvParameterSpec iv = new IvParameterSpec(INIT_VECTOR);
        cipher.init(Cipher.ENCRYPT_MODE, skeySpec, iv);
        byte[] encrypted = cipher.doFinal(sSrc.getBytes());
        return byteToHexString(encrypted);
}


    public static String decrypt(String sSrc, String sKey) throws Exception {
        try {
            byte[] raw = sKey.getBytes();
            SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES");
            Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
            IvParameterSpec iv = new IvParameterSpec(INIT_VECTOR);
            cipher.init(Cipher.DECRYPT_MODE, skeySpec, iv);
            byte[] encrypted1 = hexToBytes(sSrc);
            byte[] original = cipher.doFinal(encrypted1);
            return new String(hexToBytes(byteToHexString(original)));
        } catch (Exception ex) {
            return null;
        }
}
    public static String byteToHexString(byte[] bytes) {  
        StringBuffer sb = new StringBuffer(bytes.length);  
        String sTemp;  
        for (int i = 0; i < bytes.length; i++) {  
            sTemp = Integer.toHexString(0xFF & bytes[i]);  
            if (sTemp.length() < 2)  
                sb.append(0);  
            sb.append(sTemp.toLowerCase());  
        }  
        return sb.toString();  
    }  
    
	public static byte[] hexToBytes(String s) {
		s = s.toUpperCase();
		int len = s.length() / 2;
		int ii = 0;
		byte[] bs = new byte[len];
		char c;
		int h;
		for (int i = 0; i < len; i++) {
			c = s.charAt(ii++);
			if (c <= '9') {
				h = c - '0';
			} else {
				h = c - 'A' + 10;
			}
			h <<= 4;
			c = s.charAt(ii++);
			if (c <= '9') {
				h |= c - '0';
			} else {
				h |= c - 'A' + 10;
			}
			bs[i] = (byte) h;
		}
		return bs;
	}