RestClient操作文档

最新推荐文章于 2025-12-05 17:02:52 发布

原创最新推荐文章于 2025-12-05 17:02:52 发布 · 235 阅读

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文章标签：

#es #java

本文介绍了如何在SpringBoot项目中使用RestHighLevelClient进行Elasticsearch的CRUD操作，包括初始化客户端、插入、查询、更新和删除文档，以及批量导入数据。

初始化RestClient

@Autowired
    private RestHighLevelClient client;
 @BeforeEach
    void setUp(){
        client = new RestHighLevelClient(RestClient.builder(
                // 这里可以是多个 如果有多个es集群
                HttpHost.create("http://192.168.88.135:9200")
        ));
    }
    @AfterEach
    void setDown(){
        try {
            client.close();
        } catch (IOException e) {
            throw new RuntimeException(e);
        }
    }

新增数据

void testInsert() throws IOException {
		// mybatisplus 查询到表中的数据 
        Hotel hotel = iHotelService.getById(609372L);
        // 转换成与索引库字段相对应的实体类
        HotelDoc hd = new HotelDoc(hotel);
        // POST /hotel/_doc/609372
        IndexRequest request = new IndexRequest("hotel").id(hd.getId()+"");
        // 创建将对象转成JSON对象
        request.source(JSON.toJSONString(hd),XContentType.JSON);
        client.index(request, RequestOptions.DEFAULT);
    }

查询文档

 @Test
    void getDocument() throws IOException {
        // GET /hotel/_doc/609372
        GetRequest request = new GetRequest("hotel","609372");
        // 发送请求并得到响应
        GetResponse res = client.get(request, RequestOptions.DEFAULT);
        // 将 _source里面内容转换成字符串
        String sourceAsString = res.getSourceAsString();
        // JSON解析成对象
        HotelDoc hotelDoc = JSON.parseObject(sourceAsString, HotelDoc.class);
        System.out.println(hotelDoc);
    }

更新文档

 @Test
    void updateDocument() throws IOException {
        UpdateRequest request = new UpdateRequest("hotel","609372");
        //民治街道梅龙路与民旺路交汇处
        request.doc(
                // 他这里是以逗号隔开 逗号的左右为一个键值对
                "address","民治街道梅龙路与民旺路交汇处",
                "price","498"
        );
        client.update(request,RequestOptions.DEFAULT);
    }

删除文档

@Test
    void deleteDocument() throws IOException {
        DeleteRequest request = new DeleteRequest("hotel","609372");
        client.delete(request,RequestOptions.DEFAULT);
    }

批量导入文档数据

 @Test
    void bulkDocument() throws IOException {
        List<Hotel> list = iHotelService.list();
        BulkRequest request = new BulkRequest();
        for (Hotel hotel : list) {
            HotelDoc hd = new HotelDoc(hotel);
            request.add(new IndexRequest("hotel").id(hd.getId()+"")
                    .source(JSON.toJSONString(hd),XContentType.JSON));
        }
        client.bulk(request,RequestOptions.DEFAULT);
    }