public static boolean isNormalizedPathOutsideWorkingDir(String path) {
        final String normalize = FilenameUtils.normalize(path);
        final String prefix = FilenameUtils.getPrefix(normalize);
        return (normalize != null && StringUtils.isBlank(prefix));
    }
@Test
    public void shouldReturnFalseEvenIfAnAbsolutePathKeepsYouInsideSandbox() {
        File file = new File("somethingInsideCurrentFolder");
        assertThat(FilenameUtil.isNormalizedPathOutsideWorkingDir(file.getAbsolutePath()), is(false));
    }