标签：26 getHits searchRequest System sourceBuilder ---- println RestHighLevelClient o

@SpringBootTest
public class RestHighLevelClientOpsTest {

    private RestHighLevelClient restHighLevelClient;

    @Autowired
    public RestHighLevelClientOpsTest(RestHighLevelClient restHighLevelClient) {
        this.restHighLevelClient = restHighLevelClient;
    }

    /**
     * 查询所有 分页查询 form 起始位置  size 每页展示记录的条数
     */
    @Test
    public void testSearch() throws IOException {
        SearchRequest searchRequest = new SearchRequest("products");
        SearchSourceBuilder sourceBuilder = new SearchSourceBuilder();
        sourceBuilder.query(QueryBuilders.matchAllQuery())
                .from(0)    //起始位置：start=（page-1）*size
                .size(1);   //每页显示条数

        searchRequest.source(sourceBuilder);

        SearchResponse search = restHighLevelClient.search(searchRequest, RequestOptions.DEFAULT);

        System.out.println("总条数：" + search.getHits().getTotalHits().value);
        System.out.println("获取文档最大得分：" + search.getHits().getMaxScore());

        SearchHit[] hits = search.getHits().getHits();
        for (SearchHit hit : hits) {
            System.out.println(hit.getSourceAsString());
        }
    }

    /**
     * 查询结果默认是按分数排序，我们可以手动指定排序规则
     * 排序：按价格排序
     */
    @Test
    public void testSort() throws IOException {
        SearchRequest searchRequest = new SearchRequest("products");
        SearchSourceBuilder sourceBuilder = new SearchSourceBuilder();
        sourceBuilder.query(QueryBuilders.matchAllQuery()).sort("price", SortOrder.ASC);
        searchRequest.source(sourceBuilder);

        SearchResponse searchResponse = restHighLevelClient.search(searchRequest, RequestOptions.DEFAULT);

        System.out.println("总条数：" + searchResponse.getHits().getTotalHits().value);
        System.out.println("最大得分：" + searchResponse.getHits().getMaxScore());

        SearchHit[] hits = searchResponse.getHits().getHits();
        for (SearchHit hit : hits) {
            System.out.println(hit.getSourceAsString());
        }
    }

    /**
     * 指定返回的字段
     */
    @Test
    public void testReturn() throws IOException {
        SearchRequest searchRequest = new SearchRequest("products");
        SearchSourceBuilder sourceBuilder = new SearchSourceBuilder();

        //之所以设置两个数组，是因为如果我们字段很多的时候，我们业务需求只希望查询/排除很少一部分的字段，则只需要在查询/排除数组里面写那仅有的几个字段即可，省时省力
        sourceBuilder.query(QueryBuilders.matchAllQuery()).fetchSource(new String[]{"title"}, new String[]{});//参数1：包含的字段数组   参数2：排除的字段数组

        searchRequest.source(sourceBuilder);

        SearchResponse searchResponse = restHighLevelClient.search(searchRequest, RequestOptions.DEFAULT);

        System.out.println("总条数：" + searchResponse.getHits().getTotalHits().value);
        System.out.println("最大得分：" + searchResponse.getHits().getMaxScore());

        SearchHit[] hits = searchResponse.getHits().getHits();
        for (SearchHit hit : hits) {
            System.out.println(hit.getSourceAsString());
        }
    }

    /**
     * 高亮查询
     */
    @Test
    public void testHighlight() throws IOException {
        SearchRequest searchRequest = new SearchRequest("products");
        SearchSourceBuilder sourceBuilder = new SearchSourceBuilder();

        //高亮器
        HighlightBuilder highlightBuilder = new HighlightBuilder();
        highlightBuilder.requireFieldMatch(false)//因为高亮查询默认是对查询字段即description就行高亮，可以关闭字段匹配，这样就可以对查询到的多个字段（前提是有关键词并且改字段可以分词）进行高亮显示
                        .field("description")//若有关键字切可以分词，则可以高亮，写*可以匹配所有字段
                        .field("title")//若有关键字切可以分词，则可以高亮，写*可以匹配所有字段
                        .preTags("<span style='color:red;'>")//手动前缀标签
                        .postTags("</span>");

        sourceBuilder.query(QueryBuilders.termQuery("description", "好吃")).highlighter(highlightBuilder);///高亮搜索
        searchRequest.source(sourceBuilder);

        SearchResponse searchResponse = restHighLevelClient.search(searchRequest, RequestOptions.DEFAULT);
        SearchHit[] hits = searchResponse.getHits().getHits();
        for (SearchHit hit : hits) {
            //获取高亮字段
            Map<String, HighlightField> highlightFields = hit.getHighlightFields();

            //如果高亮字段包含在description中
            if (highlightFields.containsKey("description")){
                System.out.println("description中有这个字段");
                Text[] fragments = highlightFields.get("description").getFragments();
                for (Text fragment : fragments) {
                    System.out.println(fragment);
                }
            }

            //如果高亮字段包含在title中
            if (highlightFields.containsKey("title")){
                System.out.println("title中有这个字段");
                Text[] fragments = highlightFields.get("title").getFragments();
                for (Text fragment : fragments) {
                    System.out.println(fragment);
                }
            }
        }
    }
}

标签：26,getHits,searchRequest,System,sourceBuilder,----,println,RestHighLevelClient,o
来源： https://www.cnblogs.com/morehair/p/15823879.html

本站声明： 1. iCode9 技术分享网（下文简称本站）提供的所有内容，仅供技术学习、探讨和分享；
2. 关于本站的所有留言、评论、转载及引用，纯属内容发起人的个人观点，与本站观点和立场无关；
3. 关于本站的所有言论和文字，纯属内容发起人的个人观点，与本站观点和立场无关；
4. 本站文章均是网友提供，不完全保证技术分享内容的完整性、准确性、时效性、风险性和版权归属；如您发现该文章侵犯了您的权益，可联系我们第一时间进行删除；
5. 本站为非盈利性的个人网站，所有内容不会用来进行牟利，也不会利用任何形式的广告来间接获益，纯粹是为了广大技术爱好者提供技术内容和技术思想的分享性交流网站。