Java操作ElasticSearch8.2.0文档
不知道怎么建索引的请跳转上一篇文章Java操作ElasticSearch8.2.0索引库
1.导入maven依赖
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-elasticsearch</artifactId>
</dependency>
<dependency>
<groupId>org.elasticsearch.client</groupId>
<artifactId>elasticsearch-rest-client</artifactId>
</dependency>
<dependency>
<groupId>co.elastic.clients</groupId>
<artifactId>elasticsearch-java</artifactId>
<version>8.2.0</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>2.12.3</version>
</dependency>
<dependency>
<groupId>jakarta.json</groupId>
<artifactId>jakarta.json-api</artifactId>
<version>2.0.1</version>
</dependency>
<dependency>
<groupId>com.baomidou</groupId>
<artifactId>mybatis-plus-boot-starter</artifactId>
<version>3.5.2</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>8.0.12</version>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<optional>true</optional>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
<exclusions>
<exclusion>
<groupId>org.junit.vintage</groupId>
<artifactId>junit-vintage-engine</artifactId>
</exclusion>
</exclusions>
</dependency>
<!--FastJson-->
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>fastjson</artifactId>
<version>1.2.71</version>
</dependency>
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-lang3</artifactId>
</dependency>
</dependencies>
2.对ES文档进行操作
2.1 文档增加
官方示例：
Product product = new Product("bk-1", "City bike", 123.0);
IndexResponse response = esClient.index(i -> i
.index("products")
.id(product.getSku())
.document(product)
);
logger.info("Indexed with version " + response.version());
参考
@Test
void testAddDocument() throws IOException {
Hotel hotel = hotelService.getById(36934L);
HotelDoc hotelDoc = new HotelDoc(hotel);
elasticsearchClient.index(request -> request
.index("hotel")
.id(hotelDoc.getId().toString())
.document(hotelDoc)
);
}
2.2 批量添加
官方示例：
List<Product> products = fetchProducts();
BulkRequest.Builder br = new BulkRequest.Builder();
for (Product product : products) {
br.operations(op -> op
.index(idx -> idx
.index("products")
.id(product.getSku())
.document(product)
)
);
}
BulkResponse result = esClient.bulk(br.build());
// Log errors, if any
if (result.errors()) {
logger.error("Bulk had errors");
for (BulkResponseItem item: result.items()) {
if (item.error() != null) {
logger.error(item.error().reason());
}
}
}
举例：
@Test
void testBulkRequest() throws IOException {
List<Hotel> hotels = hotelService.list();
List<BulkOperation> bulkOperations = new ArrayList<>();
hotels.forEach(hotel -> {
HotelDoc hotelDoc = new HotelDoc(hotel);
bulkOperations.add(BulkOperation.of(bo -> bo
.index(ob -> ob
.id(hotelDoc.getId().toString())
.document(hotelDoc))));
});
elasticsearchClient.bulk(br -> br.index("hotel").operations(bulkOperations));
}
2.3增删改查批量添加操作
package cn.itcast.hotel;
import cn.itcast.hotel.pojo.Hotel;
import cn.itcast.hotel.pojo.HotelDoc;
import cn.itcast.hotel.service.impl.HotelService;
import co.elastic.clients.elasticsearch.ElasticsearchClient;
import co.elastic.clients.elasticsearch.core.BulkResponse;
import co.elastic.clients.elasticsearch.core.GetResponse;
import co.elastic.clients.elasticsearch.core.bulk.BulkOperation;
import co.elastic.clients.elasticsearch.indices.CreateIndexRequest;
import co.elastic.clients.elasticsearch.monitoring.BulkRequest;
import co.elastic.clients.json.jackson.JacksonJsonpMapper;
import co.elastic.clients.transport.rest_client.RestClientTransport;
import com.alibaba.fastjson.JSON;
import org.apache.http.HttpHost;
import org.apache.http.auth.AuthScope;
import org.apache.http.auth.Credentials;
import org.apache.http.auth.UsernamePasswordCredentials;
import org.apache.http.client.CredentialsProvider;
import org.apache.http.impl.client.BasicCredentialsProvider;
import org.apache.http.impl.nio.client.HttpAsyncClientBuilder;
import org.elasticsearch.client.RestClient;
import org.elasticsearch.client.RestClientBuilder;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.util.ResourceUtils;
import java.io.File;
import java.io.FileReader;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
/**
* @author 尹稳健~
* @version 1.0
* @time 2023/5/28
*/
@SpringBootTest
public class HotelDocumentTest {
private ElasticsearchClient elasticsearchClient;
@Autowired
private HotelService hotelService;
@Test
void testAddDocument() throws IOException {
Hotel hotel = hotelService.getById(36934L);
HotelDoc hotelDoc = new HotelDoc(hotel);
elasticsearchClient.index(request -> request
.index("hotel")
.id(hotelDoc.getId().toString())
.document(hotelDoc)
);
}
@Test
void testGetDocumentById() throws IOException {
GetResponse<HotelDoc> hotelDocGetResponse = elasticsearchClient.get(request -> request
.index("hotel")
.id("36934"),
HotelDoc.class
);
if (hotelDocGetResponse.found()) {
HotelDoc hotelDoc = hotelDocGetResponse.source();
System.out.println(hotelDoc);
}
}
@Test
void testUpdateDocument() throws IOException {
Hotel hotel = new Hotel();
hotel.setPrice(332);
hotel.setStarName("二钻");
elasticsearchClient.update(request -> request
.index("hotel")
.id("36934")
.doc(
hotel
),
HotelDoc.class
);
}
@Test
void testDeleteDocument() throws IOException {
elasticsearchClient.delete(request -> request
.index("hotel")
);
}
@Test
void testBulkRequest() throws IOException {
List<Hotel> hotels = hotelService.list();
List<BulkOperation> bulkOperations = new ArrayList<>();
hotels.forEach(hotel -> {
HotelDoc hotelDoc = new HotelDoc(hotel);
bulkOperations.add(BulkOperation.of(bo -> bo
.index(ob -> ob
.id(hotelDoc.getId().toString())
.document(hotelDoc))));
});
elasticsearchClient.bulk(br -> br.index("hotel").operations(bulkOperations));
}
@BeforeEach
void setUp() {
final CredentialsProvider credentialsProvider = new BasicCredentialsProvider();
Credentials creds = new UsernamePasswordCredentials("elastic", "J=9XqTBAk-2GLwd_msUx");
credentialsProvider.setCredentials(AuthScope.ANY, creds);
RestClient restClient = RestClient.builder(
HttpHost.create("http://192.168.33.136:9200")
).setHttpClientConfigCallback(new RestClientBuilder.HttpClientConfigCallback() {
@Override
public HttpAsyncClientBuilder customizeHttpClient(HttpAsyncClientBuilder httpAsyncClientBuilder) {
return httpAsyncClientBuilder.setDefaultCredentialsProvider(credentialsProvider);
}
}).build();
RestClientTransport restClientTransport = new RestClientTransport(restClient, new JacksonJsonpMapper());
elasticsearchClient = new ElasticsearchClient(restClientTransport);
}
}