public static Class findClassByName(String className) {
        try {
            return Class.forName(className);
        } catch (Exception e) {
            throw new NacosRuntimeException(SERVER_ERROR, "this class name not found");
        }
    }
@Test
    void testFindClassByName2() {
        assertThrows(NacosRuntimeException.class, () -> {
            ClassUtils.findClassByName("not.exist.Class");
        });
    }