[大数据]八、范围查询

范围查询：range

• es中任何查询都能排序
• gte：设置下限
• lte：设置上限

GET goods/_search
{
  "query": {
    "range": {
      "price": {
        "gte": 100,
        "lte": 500
      }
    }
  }
}

也可以设置排序规则：

GET goods/_search
{
  "query": {
    "range": {
      "price": {
        "gte": 100,
        "lte": 500
      }
    }
  },
  "sort": [
    {
      "saleNum": {
        "order": "desc"
      }
    }
  ]
}

    /**
     * 范围查询：rangeQuery
     */
    @Test
    public void testRangeQuery() throws IOException {
        SearchRequest searchRequest = new SearchRequest("goods");
        SearchSourceBuilder sourceBuilder = new SearchSourceBuilder();
        RangeQueryBuilder rangeQuery = QueryBuilders.rangeQuery("price");
        // 指定下限
        rangeQuery.gte(100);
        // 指定上限
        rangeQuery.lte(500);

        sourceBuilder.query(rangeQuery);
        sourceBuilder.sort("saleNum", SortOrder.DESC);

        searchRequest.source(sourceBuilder);
        SearchResponse searchResponse = client.search(searchRequest, RequestOptions.DEFAULT);
        SearchHits searchHits = searchResponse.getHits();
        long value = searchHits.getTotalHits().value;
        System.out.println("总记录数:" + value);
        SearchHit[] hits = searchHits.getHits();
        List<Goods> goodsList = new ArrayList<>();
        for (SearchHit hit : hits) {
            String sourceAsString = hit.getSourceAsString();
            Goods goods = JSON.parseObject(sourceAsString, Goods.class);
            goodsList.add(goods);
        }
        goodsList.forEach(c -> System.out.println(JSON.toJSONString(c)));
    }