基于solr 的分组排序

	 // 最近7天 && source != 3 ;   按照attention_uid  分组，安装 count(uid) 排序
 public List<Map<String, Object>> findWeekAttentionList(Integer index, Integer row, int appType) {

        long pass7Day = DateUtils.addDays(new Date(), -7).getTime();

        List<Map<String, Object>> list = new ArrayList<>();

        SolrQuery solrQuery = new SolrQuery();
//        solrQuery.set("q", "*:*" );

        solrQuery.setParam("facet", true);//是否分组
        solrQuery.set("df", "attention_uid,count");
        solrQuery.setParam("facet.field", "attention_uid");//分组的域
        solrQuery.setParam("facet.sort", "true");
        solrQuery.setParam("facet.mincount", "1");
        solrQuery.setParam("facet.offset", String.valueOf(index));
        solrQuery.setParam("facet.limit", String.valueOf(row));// <0 全部

        String createTimeCondition = String.format("create_time:[%s TO *]", pass7Day);
        String sourceCondition = " -source: 3  ";

        String q = sourceCondition + " AND " + createTimeCondition;
        solrQuery.set("q", q);


        solrQuery.setStart(0);
        solrQuery.setRows(0);

        QueryResponse resp = null;
        try {
            resp = solrClient.query(solrQuery);
        } catch (SolrServerException e) {
            throw new RuntimeException(e);
        } catch (IOException e) {
            throw new RuntimeException(e);
        }
        List<FacetField> facetFields = resp.getFacetFields();
        if (CollectionUtils.isEmpty(facetFields)) return list;


        Optional<FacetField> first = facetFields.stream().findFirst();
        FacetField facetField = first.get();
        if (facetField == null) return list;

        List<FacetField.Count> values = facetField.getValues();


        Map<String, Object> item = null;
        for (FacetField.Count countItem : values) {
            item = new HashMap<>();
            item.put("attentionUid", countItem.getName());
            item.put("num", countItem.getCount());
            list.add(item);
        }
        return list;
    }