final HogeDto2 hoge = new HogeDto2();
        hoge.aaa = "1";
        hoge.search_bbb = "2";
        hoge.search_ccc$ddd = "3";
        final Map<String, Object> map = BeanUtil.copyBeanToNewMap(hoge);
        assertThat(map.size(), is(4));
        assertThat(map.get("aaa"), is((Object) "1"));
        assertThat(map.get("search_bbb"), is((Object) "2"));
        assertThat(map.get("search_ccc.ddd"), is((Object) "3"));