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 getKeySpecialTest() {
        String key = Md5ConfigUtil.getKey("DataId+", "Group");
        Assert.isTrue(Objects.equals("DataId%2B+Group", key));

        String key1 = Md5ConfigUtil.getKey("DataId%", "Group");
        Assert.isTrue(Objects.equals("DataId%25+Group", key1));
    }