【Elasticsearch】es基础入门-03.RestClient操作文档

RestClient操作文档

示例：

一.初始化JavaRestClient

（一）引入es的RestHighLevelClient依赖

<!--elasticsearch-->
<dependency><groupId>org.elasticsearch.client</groupId><artifactId>elasticsearch-rest-high-level-client</artifactId>
</dependency>

（二）因为SpringBoot默认的ES版本是7.6.2，所以我们需要覆盖默认的ES版本:

<properties><elasticsearch.version>7.17.21</elasticsearch.version>
</properties>

（三）新建一个测试类，初始化JavaRestClient

public class HotelDocumentTest {private RestHighLevelClient client;@BeforeEachvoid setUp() {client = new RestHighLevelClient(RestClient.builder(HttpHost.create("http://192.168.174.129:9200")));}@AfterEachvoid tearDown() throws IOException {client.close();}
}

二.添加酒店数据到文档

（一）数据库文件

-- ----------------------------
-- 创建表
-- ----------------------------
DROP TABLE IF EXISTS `tb_hotel`;
CREATE TABLE `tb_hotel`  (`id` bigint(20) NOT NULL COMMENT '酒店id',`name` varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NOT NULL COMMENT '酒店名称',`address` varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NOT NULL COMMENT '酒店地址',`price` int(10) NOT NULL COMMENT '酒店价格',`score` int(2) NOT NULL COMMENT '酒店评分',`brand` varchar(32) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NOT NULL COMMENT '酒店品牌',`city` varchar(32) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NOT NULL COMMENT '所在城市',`star_name` varchar(16) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NULL DEFAULT NULL COMMENT '酒店星级，1星到5星，1钻到5钻',`business` varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NULL DEFAULT NULL COMMENT '商圈',`latitude` varchar(32) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NOT NULL COMMENT '纬度',`longitude` varchar(32) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NOT NULL COMMENT '经度',`pic` varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NULL DEFAULT NULL COMMENT '酒店图片',PRIMARY KEY (`id`) USING BTREE
) ENGINE = InnoDB CHARACTER SET = utf8mb4 COLLATE = utf8mb4_general_ci ROW_FORMAT = Compact;-- ----------------------------
-- 插入一点数据
-- ----------------------------
INSERT INTO `tb_hotel` VALUES (36934, '7天连锁酒店(上海宝山路地铁站店)', '静安交通路40号', 336, 37, '7天酒店', '上海', '二钻', '四川北路商业区', '31.251433', '121.47522', 'https://m.tuniucdn.com/fb2/t1/G1/M00/3E/40/Cii9EVkyLrKIXo1vAAHgrxo_pUcAALcKQLD688AAeDH564_w200_h200_c1_t0.jpg');
INSERT INTO `tb_hotel` VALUES (38609, '速8酒店(上海赤峰路店)', '广灵二路126号', 249, 35, '速8', '上海', '二钻', '四川北路商业区', '31.282444', '121.479385', 'https://m.tuniucdn.com/fb2/t1/G2/M00/DF/96/Cii-TFkx0ImIQZeiAAITil0LM7cAALCYwKXHQ4AAhOi377_w200_h200_c1_t0.jpg');
INSERT INTO `tb_hotel` VALUES (38665, '速8酒店上海中山北路兰田路店', '兰田路38号', 226, 35, '速8', '上海', '二钻', '长风公园地区', '31.244288', '121.422419', 'https://m.tuniucdn.com/fb2/t1/G2/M00/EF/86/Cii-Tlk2mV2IMZ-_AAEucgG3dx4AALaawEjiycAAS6K083_w200_h200_c1_t0.jpg');
INSERT INTO `tb_hotel` VALUES (38812, '7天连锁酒店(上海漕溪路地铁站店)', '徐汇龙华西路315弄58号', 298, 37, '7天酒店', '上海', '二钻', '八万人体育场地区', '31.174377', '121.442875', 'https://m.tuniucdn.com/fb2/t1/G2/M00/E0/0E/Cii-TlkyIr2IEWNoAAHQYv7i5CkAALD-QP2iJwAAdB6245_w200_h200_c1_t0.jpg');
INSERT INTO `tb_hotel` VALUES (39106, '7天连锁酒店（上海莘庄地铁站店）', '闵行莘庄镇七莘路299号', 348, 41, '7天酒店', '上海', '二钻', '莘庄工业区', '31.113812', '121.375869', 'https://m.tuniucdn.com/fb2/t1/G2/M00/D8/11/Cii-T1ku2zGIGR7uAAF1NYY9clwAAKxZAHO8HgAAXVN368_w200_h200_c1_t0.jpg');
INSERT INTO `tb_hotel` VALUES (39141, '7天连锁酒店(上海五角场复旦同济大学店)', '杨浦国权路315号', 349, 38, '7天酒店', '上海', '二钻', '江湾、五角场商业区', '31.290057', '121.508804', 'https://m.tuniucdn.com/fb2/t1/G2/M00/C7/E3/Cii-T1knFXCIJzNYAAFB8-uFNAEAAKYkQPcw1IAAUIL012_w200_h200_c1_t0.jpg');
INSERT INTO `tb_hotel` VALUES (45845, '上海西藏大厦万怡酒店', '虹桥路100号', 589, 45, '万怡', '上海', '四钻', '徐家汇地区', '31.192714', '121.434717', 'https://m.tuniucdn.com/fb3/s1/2n9c/48GNb9GZpJDCejVAcQHYWwYyU8T_w200_h200_c1_t0.jpg');
INSERT INTO `tb_hotel` VALUES (45870, '上海临港豪生大酒店', '新元南路555号', 896, 45, '豪生', '上海', '四星级', '滴水湖临港地区', '30.871729', '121.81959', 'https://m.tuniucdn.com/fb3/s1/2n9c/2F5HoQvBgypoDUE46752ppnQaTqs_w200_h200_c1_t0.jpg');
INSERT INTO `tb_hotel` VALUES (46829, '上海浦西万怡酒店', '恒丰路338号', 726, 46, '万怡', '上海', '四钻', '上海火车站地区', '31.242977', '121.455864', 'https://m.tuniucdn.com/fb3/s1/2n9c/x87VCoyaR8cTuYFZmKHe8VC6Wk1_w200_h200_c1_t0.jpg');
INSERT INTO `tb_hotel` VALUES (47066, '上海浦东东站华美达酒店', '施新路958号', 408, 46, '华美达', '上海', '四钻', '浦东机场核心区', '31.147989', '121.759199', 'https://m.tuniucdn.com/fb3/s1/2n9c/2pNujAVaQbXACzkHp8bQMm6zqwhp_w200_h200_c1_t0.jpg');
INSERT INTO `tb_hotel` VALUES (47478, '速8酒店(上海松江中心店)', '松江荣乐东路677号', 428, 35, '速8', '上海', '二钻', '佘山、松江大学城', '31.016712', '121.261606', 'https://m.tuniucdn.com/filebroker/cdn/res/07/36/073662e1718fccefb7130a9da44ddf5c_w200_h200_c1_t0.jpg');

（二）实体类

索引库实体类Hotel

@Data
@TableName("tb_hotel")
public class Hotel {@TableId(type = IdType.INPUT)private Long id;private String name;private String address;private Integer price;private Integer score;private String brand;private String city;private String starName;private String business;private String longitude;private String latitude;private String pic;
}

文档实体类HotelDoc

@Data
@NoArgsConstructor
public class HotelDoc {private Long id;private String name;private String address;private Integer price;private Integer score;private String brand;private String city;private String starName;private String business;private String location;private String pic;public HotelDoc(Hotel hotel) {this.id = hotel.getId();this.name = hotel.getName();this.address = hotel.getAddress();this.price = hotel.getPrice();this.score = hotel.getScore();this.brand = hotel.getBrand();this.city = hotel.getCity();this.starName = hotel.getStarName();this.business = hotel.getBusiness();this.location = hotel.getLatitude() + ", " + hotel.getLongitude();this.pic = hotel.getPic();}
}

（三）mapper层

public interface HotelMapper extends BaseMapper<Hotel> {
}

（四）service层

1

public interface IHotelService extends IService<Hotel> {
}

2

@Service
public class HotelService extends ServiceImpl<HotelMapper, Hotel> implements IHotelService {
}

（五）测试类编写

@SpringBootTest
public class HotelDocumentTest {private RestHighLevelClient client;@Autowiredprivate IHotelService hotelService;@BeforeEachvoid setUp() {client = new RestHighLevelClient(RestClient.builder(//注意：这里的IP地址是es的地址HttpHost.create("http://192.168.174.129:9200")));}@Testvoid testAddDocument() throws IOException {//根据id查询酒店信息Hotel hotel = hotelService.getById(39106L);//转换为文档类型HotelDoc hotelDoc = new HotelDoc(hotel);//1.准备Request对象  索引库名称和文档idIndexRequest request = new IndexRequest("hotel").id(hotel.getId().toString());//2.准备Json文档request.source(JSON.toJSONString(hotelDoc),XContentType.JSON);//3.发送请求client.index(request,RequestOptions.DEFAULT);}@AfterEachvoid tearDown() throws IOException {client.close();}
}

三.创建文档的结果

运行测试类后：

在es可视化平台elastic上，查看创建的文档

GET /hotel/_doc/39106

四.根据id查询酒店数据

@Test
void testGetDocumentById() throws IOException {// 1.准备Request      // GET /hotel/_doc/{id}GetRequest request = new GetRequest("hotel", "39106");// 2.发送请求GetResponse response = client.get(request, RequestOptions.DEFAULT);// 3.解析响应结果String json = response.getSourceAsString();//json反序列化HotelDoc hotelDoc = JSON.parseObject(json, HotelDoc.class);System.out.println("hotelDoc = " + hotelDoc);
}

运行后

五.根据id修改酒店数据

方式一：全量更新。先删除旧文档，再创建新的文档

方式二：局部更新。只更新部分字段

@Test
void testUpdateById() throws IOException {// 1.准备RequestUpdateRequest request = new UpdateRequest("hotel", "39106");// 2.准备参数request.doc("price", "870","starName","五星");// 3.发送请求client.update(request, RequestOptions.DEFAULT);
}

先运行修改，再运行查询，结果如下：

六.根据id删除文档

@Test
void testDeleteDocument() throws IOException {//1.准备RequestDeleteRequest request = new DeleteRequest("hotel","39106");//2.发送请求client.delete(request,RequestOptions.DEFAULT)
}

先运行删除，再运行查询，结果如下：

七.RestClient批量导入酒店数据到ES

@Test
void testBulkRequest() throws IOException {// 查询所有的酒店数据List<Hotel> list = hotelService.list();// 1.准备RequestBulkRequest request = new BulkRequest();// 2.准备参数for (Hotel hotel : list) {// 2.1.转为文档类型HotelDocHotelDoc hotelDoc = new HotelDoc(hotel);// 2.2.转jsonString json = JSON.toJSONString(hotelDoc);// 2.3.添加请求request.add(new IndexRequest("hotel").id(hotel.getId().toString()).source(json, XContentType.JSON));}// 3.发送请求client.bulk(request, RequestOptions.DEFAULT);
}

运行后

在es可视化平台elastic上，查看所有文档

GET /hotel/_search