public static byte[] compress(byte[] bytes) {
        if (bytes == null) {
            throw new NullPointerException("bytes is null");
        }
        ByteArrayOutputStream bos = new ByteArrayOutputStream();
        try (CBZip2OutputStream bzip2 = new CBZip2OutputStream(bos)) {
            bzip2.write(bytes);
            bzip2.finish();
            return bos.toByteArray();
        } catch (IOException e) {
            throw new RuntimeException("BZip2 compress error", e);
        }
    }
@Test
    public void test_compress() {
        Assertions.assertThrows(NullPointerException.class, () -> {
            BZip2Util.compress(null);
        });
    }