assertEquals("1", "xml", ResourceUtil.getExtension("aaa/bbb.xml"));
        assertEquals("2", null, ResourceUtil.getExtension("aaa"));
    }

    /**
     * @throws Exception
     */
    public void testRemoteExtension() throws Exception {
        assertEquals("1", "aaa/bbb", ResourceUtil.removeExtension("aaa/bbb.xml"));
        assertEquals("2", "aaa/bbb", ResourceUtil.removeExtension("aaa/bbb"));
    }

    /**