public static String getKey(String dataId, String group) {
        StringBuilder sb = new StringBuilder();
        GroupKey.urlEncode(dataId, sb);
        sb.append('+');
        GroupKey.urlEncode(group, sb);
        return sb.toString();
    }
@Test
    public void getKeyTest() {
        String key = Md5ConfigUtil.getKey("DataId", "Group");
        Assert.isTrue(Objects.equals("DataId+Group", key));
    }