全文检索：

两种查询：
1，macth
2，multi_match （多字段查询）查询与match_all的API基本一致
都是属于query的部分
而两种查询的
差异在于类型和条件上。
请求方式一样路径一样

全文查询 match 和multi_match 查询与match_all的API基本一致
差别是查询条件 也就是query、的部分

精确查询：

term查询和range查询 同样利用QueryBuilders实现：

符合查询—boolean query

@SpringBootTest
class HotelSearchTest {
    //l利用service来完成增删改查
    @Autowired
    private IHotelService hotelService;
    private RestHighLevelClient client;
    @Test
    void testMatchAll() throws IOException {
        //准备request对象
        SearchRequest request = new SearchRequest("hotel");
        //准备DSL
        request.source().query(QueryBuilders.matchAllQuery());
        //发送请求
        SearchResponse response = client.search(request, RequestOptions.DEFAULT);
        AllMatch(response);
    }
    @Test
    void testmatch() throws IOException {
        //准备REQUEST
        SearchRequest request = new SearchRequest("hotel");
        //准备DSL
        request.source().query(QueryBuilders.matchQuery("all","如家"));
        //发送请求
        SearchResponse response = client.search(request, RequestOptions.DEFAULT);
            AllMatch(response);
    }
    private void AllMatch(SearchResponse response) {
        //解析响应的json
        SearchHits hits = response.getHits();
        //拉取总条数
        long value = hits.getTotalHits().value;
        //来取文档数组
        SearchHit[] hits1 = hits.getHits();
        //遍历数组进行反序列化
        for (SearchHit documentFields : hits1) {
            //读取文档score
            String json = documentFields.getSourceAsString();
            HotelDoc hotelDoc = JSON.parseObject(json, HotelDoc.class);
        }
        System.out.println(response);
    }
    @Test
    private void testBool() throws IOException {
        //准备REQUEST
        SearchRequest request = new SearchRequest("hotel");
        //准备DSL
            //BooleanQuery
        BoolQueryBuilder boolQueryBuilder = QueryBuilders.boolQuery();
            //添加term
        boolQueryBuilder.must(QueryBuilders.termQuery("city","杭州"));
        //添加range
        boolQueryBuilder.must(QueryBuilders.rangeQuery("parice").lt("杭州"));
        //发送请求
        SearchResponse response = client.search(request, RequestOptions.DEFAULT);
        AllMatch(response);
    }
    @BeforeEach
    void setUp() {
        client = new RestHighLevelClient(RestClient.builder(
                HttpHost.create("http://114.55.210.174:9200")
        ));
    }
    @AfterEach
    void tearDown() throws IOException {
        client.close();
    }
}