Elasticsearch Java 客户端依赖 - Java

Elasticsearch是一个基于Lucene搜索引擎构建的开源搜索引擎。在Java中使用Elasticsearch时，可以使用Elasticsearch Java客户端。本文介绍如何在Java中添加Elasticsearch Java客户端依赖。

添加Elasticsearch Java客户端依赖

Gradle

通过Gradle添加Elasticsearch Java客户端依赖，需要修改build.gradle文件：

dependencies {
    implementation 'org.elasticsearch.client:elasticsearch-rest-high-level-client:7.15.0'
}

Maven

通过Maven添加Elasticsearch Java客户端依赖，需要修改pom.xml文件：

<dependencies>
    <dependency>
        <groupId>org.elasticsearch.client</groupId>
        <artifactId>elasticsearch-rest-high-level-client</artifactId>
        <version>7.15.0</version>
    </dependency>
</dependencies>

示例代码

以下是使用Elasticsearch Java客户端进行搜索的示例代码：

import org.apache.http.HttpHost;
import org.elasticsearch.action.search.SearchRequest;
import org.elasticsearch.action.search.SearchResponse;
import org.elasticsearch.client.RequestOptions;
import org.elasticsearch.client.RestClient;
import org.elasticsearch.client.RestHighLevelClient;
import org.elasticsearch.common.unit.TimeValue;
import org.elasticsearch.index.query.QueryBuilders;
import org.elasticsearch.search.builder.SearchSourceBuilder;

import java.io.IOException;

public class ElasticsearchJavaClientExample {

    private static final String HOST_NAME = "localhost";
    private static final int PORT = 9200;
    private static final String INDEX_NAME = "my_index";

    public static void main(String[] args) throws IOException {

        RestHighLevelClient client = new RestHighLevelClient(
                RestClient.builder(
                        new HttpHost(HOST_NAME, PORT, "http")));

        SearchRequest searchRequest = new SearchRequest(INDEX_NAME);
        SearchSourceBuilder searchSourceBuilder = new SearchSourceBuilder();
        searchSourceBuilder.query(QueryBuilders.matchQuery("title", "java"));
        searchSourceBuilder.from(0);
        searchSourceBuilder.size(5);
        searchSourceBuilder.timeout(TimeValue.timeValueSeconds(60));
        searchRequest.source(searchSourceBuilder);

        SearchResponse searchResponse = client.search(searchRequest, RequestOptions.DEFAULT);

        System.out.println(searchResponse);

        client.close();
    }
}

以上是添加Elasticsearch Java客户端依赖和使用示例代码的介绍。用户可以根据自己的需求来使用Elasticsearch Java客户端进行搜索。