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目录

12.5 RestClient操作索引库

12.5.1创建库

12.5.2 删除索引库

12.5.3 判断是否存在

12.6 RestClient操作文档

12.6.1 新增文档

12.6.2 查询文档

12.6.3 修改文档

12.6.4 删除文档

12.6.5 批量导入文档

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12.5 RestClient操作索引库

酒店mapping映射

  ​PUT /hotel{"mappings": {"properties": {"id": {"type": "keyword","copy_to": "all"},"name": {"type": "text","analyzer": "ik_max_word"},"address": {"type": "keyword","index": false},"price": {"type": "integer"},"score": {"type": "integer"},"brand": {"type": "keyword","copy_to": "all"},"city": {"type": "keyword"},"starName": {"type": "keyword"},"business": {"type": "keyword"},"location": {"type": "geo_point"},"pic": {"type": "keyword","index": false},"all": {"type": "text","analyzer": "ik_max_word"}}}}

导入依赖

  <!--elasticSearch依赖--><dependency><groupId>org.elasticsearch.client</groupId><artifactId>elasticsearch-rest-high-level-client</artifactId><version>7.12.1</version></dependency>

  <properties><java.version>1.8</java.version><elasticsearch.version>7.12.1</elasticsearch.version></properties>

创建对象

  @SpringBootTestclass HotelIndexTest {private RestHighLevelClient client;​// 客户端初始化@BeforeEachvoid setUp(){this.client = new RestHighLevelClient(RestClient.builder(HttpHost.create("http://192.168.142.129:9200")));}​@Testvoid tetsInit(){System.out.println(client);}​// 客户端销毁@AfterEachvoid tearDown() throws IOException {this.client.close();}}

client.indices()包含了操作索引库的所有方法

12.5.1创建库

  @Testvoid testCreateHotelIndex() throws IOException {// 1. 创建Request对象CreateIndexRequest request = new CreateIndexRequest("hotel");// 2. 准备请求的参数request.source(MAPPING_TEMPLATE,XContentType.JSON);// 3. 发送请求    client.indices()的返回值包含了索引库额所有操作client.indices().create(request,RequestOptions.DEFAULT);}

MAPPING_TEMPLATE是自定义的常量，也就是上面创建索引库的语句

12.5.2 删除索引库

  @Testvoid testDeleteIndex() throws IOException {// 1. 创建request对象DeleteIndexRequest request = new DeleteIndexRequest("hotel");// 2. 发送请求client.indices().delete(request,RequestOptions.DEFAULT);}

12.5.3 判断是否存在

  @Testvoid testExistIndex() throws IOException {// 1. 创建request对象GetIndexRequest request = new GetIndexRequest("hotel");// 2. 发送请求boolean exists = client.indices().exists(request, RequestOptions.DEFAULT);// 3. 输出System.out.println(exists ? "索引库存在" : "索引库不存在");}

12.6 RestClient操作文档

12.6.1 新增文档

  @Testvoid testIndexDocument() throws IOException {// 在数据库查到数据Hotel hotel = iHotelService.getById(61083L);HotelDoc hotelDoc = new HotelDoc(hotel); // 经度 + 纬度 拼接之后的对象 ,即索引库需要的类型// 1. 创建请求对象IndexRequest request = new IndexRequest("hotel").id(hotel.getId().toString());// 2. 准备json文档 把查到的对象转换成json对象request.source(JSON.toJSONString(hotelDoc),XContentType.JSON);// 3. 发送请求client.index(request,RequestOptions.DEFAULT);}

12.6.2 查询文档

  @Testvoid testGetDocumentById() throws IOException {// 1. 准备requestGetRequest request = new GetRequest("hotel", "61083");// 2. 发送请求GetResponse response = client.get(request, RequestOptions.DEFAULT);// 3. 从响应中解析对象String json = response.getSourceAsString();// 4. 把json转成HotelDoc对象HotelDoc hotelDoc = JSON.parseObject(json, HotelDoc.class);System.out.println(hotelDoc);}

12.6.3 修改文档

第二种更新方式，即局部更新的代码 :

  @Testvoid testUpdateDocumentById() throws IOException {// 1. 准备RequestUpdateRequest request = new UpdateRequest("hotel", "61083");// 2. 准备请求参数request.doc("age", 18,"name","Rose");// 3. 发送请求client.update(request,RequestOptions.DEFAULT);}

12.6.4 删除文档

  @Testvoid testDeleteDocumentById() throws IOException {// 1. 准备requestDeleteRequest request = new DeleteRequest("hotel","61083");// 2. 发送请求client.delete(request,RequestOptions.DEFAULT);}

12.6.5 批量导入文档

  @Testvoid testBulk() throws IOException {// 批量查询酒店数据List<Hotel> hotels = iHotelService.list();// 1. 创建Bulk请求BulkRequest request = new BulkRequest();// 2. 准备参数  添加多个新增的requestfor (Hotel hotel : hotels) {// 把hotel转成hotelDoc对象HotelDoc hotelDoc = new HotelDoc(hotel);request.add(new IndexRequest("hotel").id(hotelDoc.getId().toString()).source(JSON.toJSONString(hotelDoc),XContentType.JSON));}​// 3. 发送请求client.bulk(request,RequestOptions.DEFAULT);}