public static boolean isContains(String values, String value) {
        return isNotEmpty(values) && isContains(COMMA_SPLIT_PATTERN.split(values), value);
    }
@Test
    void testIsContains() throws Exception {
        assertThat(StringUtils.isContains("a,b, c", "b"), is(true));
        assertThat(StringUtils.isContains("", "b"), is(false));
        assertThat(StringUtils.isContains(new String[] {"a", "b", "c"}, "b"), is(true));
        assertThat(StringUtils.isContains((String[]) null, null), is(false));

        assertTrue(StringUtils.isContains("abc", 'a'));
        assertFalse(StringUtils.isContains("abc", 'd'));
        assertFalse(StringUtils.isContains("", 'a'));
        assertFalse(StringUtils.isContains(null, 'a'));

        assertTrue(StringUtils.isNotContains("abc", 'd'));
        assertFalse(StringUtils.isNotContains("abc", 'a'));
        assertTrue(StringUtils.isNotContains("", 'a'));
        assertTrue(StringUtils.isNotContains(null, 'a'));
    }