526互联

ES - RestClient 查询文档

发布时间 2023-09-30 20:22:01作者: chuangzhou

目录

快速入门

@SpringBootTest
class SearchfDocTest {

    private RestHighLevelClient client;


    //查询所有文档
    @Test
    public void testMatchAll() throws IOException {
        //1. 准备请求对象
        SearchRequest searchRequest = new SearchRequest("hotel");
        //2. 准备DSL
       searchRequest.source().query(QueryBuilders.matchAllQuery());
        //3. 发送请求
        SearchResponse response = client.search(searchRequest, RequestOptions.DEFAULT);

        //4. 解析响应解锁
        SearchHits hits = response.getHits();
        //4.1 获取搜索到的总条数
        long value = hits.getTotalHits().value;
        System.out.println("共搜索到" + value + "条数据");
        SearchHit[] hitsArr = hits.getHits();
        for (SearchHit hit : hits) {
            //获取文档soure
            String sourceAsString = hit.getSourceAsString();
            //反序列化
            HotelDoc hotel = JSON.parseObject(sourceAsString, HotelDoc.class);
            System.out.println(hotel);
        }
    }

    @BeforeEach
    void setUp() {
        this.client = new RestHighLevelClient(RestClient.builder(
                HttpHost.create("http://192.168.184.152:9200")
        ));
    }
    @AfterEach
    void tearDown() throws IOException {
        this.client.close();
    }
}