AES/CBC/PKCS5Padding加密

1、加密代码如下

    public static String encryptAEs_CBC(String data,String key,byte[] iv) {
        Cipher cipher = null;
        try {
            cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
            //位数不够，自动补一个长度
            int blocksize = cipher.getBlockSize();
            byte[] dataBytes = data.getBytes();
            int dataLength = dataBytes.length;
            if (dataLength % blocksize != 0) {
                dataLength = dataLength + (blocksize - (dataLength % blocksize));
                byte[] plaintext = new byte[dataLength];
                System.arraycopy(dataBytes, 0, plaintext, 0, dataBytes.length);
                SecretKeySpec secretKey = new SecretKeySpec(key.getBytes(), &#