AES加密，CBC模式，0填充

java的aes加密的CBC模式只有NoPadding，PKCS5Padding，PKCS7Padding，所以0填充須要手動更改

public static byte[] encrypt(byte[] data, byte[] iv, byte[] key) {    if(key.length != 16) {        throw new RuntimeException("Invalid AES key length (must be 16 bytes)");    } else {        try {            SecretKeySpec secretKey = new SecretKeySpec(key, "AES");            byte[] enCodeFormat = secretKey.getEncoded();            SecretKeySpec seckey = new SecretKeySpec(enCodeFormat, "AES");            Cipher cipher = Cipher.getInstance("AES/CBC/NoPadding");            int blockSize=cipher.getBlockSize();            int length=data.length;            if(length%blockSize!=0){                length=length+(blockSize-(length%blockSize));            }            byte[] plaintext=new byte[length];            System.arraycopy(data,0,plaintext,0,data.length);            IvParameterSpec ivSpec = new IvParameterSpec(iv);            cipher.init(1, seckey, ivSpec);            byte[] result = cipher.doFinal(plaintext);            return result;        } catch (Exception var9) {            throw new RuntimeException("encrypt fail!", var9);        }    }}