public static String clean(String charsetName) {
        try {
            return forName(charsetName).name();
        } catch (IllegalArgumentException e) {
            return null;
        }
    }
@Test
    public void testFunkyNames() {
        assertEquals(null, CharsetUtils.clean("none"));
        assertEquals(null, CharsetUtils.clean("no"));

        assertEquals("UTF-8", CharsetUtils.clean("utf-8>"));

        assertEquals("ISO-8859-1", CharsetUtils.clean("iso-8851-1"));
        assertEquals("ISO-8859-15", CharsetUtils.clean("8859-15"));

        assertEquals("windows-1251", CharsetUtils.clean("cp-1251"));
        assertEquals("windows-1251", CharsetUtils.clean("win1251"));
        assertEquals("windows-1251", CharsetUtils.clean("WIN-1251"));
        assertEquals("windows-1251", CharsetUtils.clean("win-1251"));
        assertEquals("windows-1252", CharsetUtils.clean("Windows"));

        assertEquals("KOI8-R", CharsetUtils.clean("koi8r"));
    }