public static void touch(String path, String fileName) throws IOException {
        FileUtils.touch(Paths.get(path, fileName).toFile());
    }
@Test
    void testTouch() throws IOException {
        File file = Paths.get(EnvUtil.getNacosTmpDir(), "touch.ut").toFile();
        assertFalse(file.exists());
        DiskUtils.touch(file);
        assertTrue(file.exists());
        file.deleteOnExit();
    }