Java操作Elasticsearch

引入依赖

引入的依赖版本必须和正在运行的Elasticsearch版本一致

<dependency>
    <groupId>org.elasticsearch.client</groupId>
    <artifactId>transport</artifactId>
    <version>5.5.2</version>
</dependency>
<dependency>
    <groupId>com.google.code.gson</groupId>
    <artifactId>gson</artifactId>
    <version>2.8.5</version>
</dependency>
<dependency>
    <groupId>junit</groupId>
    <artifactId>junit</artifactId>
    <version>4.12</version>
    <scope>test</scope>
</dependency>

实现

import com.google.gson.JsonObject;
import org.elasticsearch.action.index.IndexResponse;
import org.elasticsearch.client.transport.TransportClient;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.common.transport.InetSocketTransportAddress;
import org.elasticsearch.common.xcontent.XContentType;
import org.elasticsearch.transport.client.PreBuiltTransportClient;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;

import java.net.InetAddress;

/**
 * @author LeDao
 * @company
 * @create 2021-12-15 2:57
 */
public class MyTest {

    private static String host = "192.168.0.116";
    private static int port = 9300;
    private TransportClient client = null;

    /**
     * 操作q获取连接
     *
     * @throws Exception
     */
    @Before
    public void getClient() throws Exception {
        client = new PreBuiltTransportClient(Settings.EMPTY)
                .addTransportAddress(new InetSocketTransportAddress(InetAddress.getByName(host), port));
    }

    /**
     * 操作索引关闭连接
     */
    @After
    public void closeClient() {
        if (client != null) {
            client.close();
        }
    }
}

@Test
public void addIndex() {
    JsonObject jsonObject = new JsonObject();
    jsonObject.addProperty("name", "Java编程思想");
    jsonObject.addProperty("publishDate", "2012-11-23");
    jsonObject.addProperty("price", 88);
    IndexResponse indexResponse = client
            .prepareIndex("book", "java", "1")
            .setSource(jsonObject.toString(), XContentType.JSON)
            .get();
    System.out.println("索引名称:" + indexResponse.getIndex());
    System.out.println("索引类型:" + indexResponse.getType());
    System.out.println("文档id:" + indexResponse.getId());
    System.out.println("当前状态:" + indexResponse.status());
}

@Test
public void deleteIndex() {
    DeleteResponse deleteResponse = client
            .prepareDelete("book", "java", "1")
            .get();
    System.out.println("索引名称:" + deleteResponse.getIndex());
    System.out.println("索引类型:" + deleteResponse.getType());
    System.out.println("文档id:" + deleteResponse.getId());
    System.out.println("当前状态:" + deleteResponse.status());
}

@Test
public void updateIndex() {
    JsonObject jsonObject = new JsonObject();
    jsonObject.addProperty("name", "Java编程思想2");
    jsonObject.addProperty("publishDate", "2012-11-22");
    jsonObject.addProperty("price", 77);

    UpdateResponse updateResponse = client
            .prepareUpdate("book", "java", "1")
            .setDoc(jsonObject.toString(), XContentType.JSON).get();
    System.out.println("索引名称:" + updateResponse.getIndex());
    System.out.println("索引类型:" + updateResponse.getType());
    System.out.println("文档id:" + updateResponse.getId());
    System.out.println("当前状态:" + updateResponse.status());
}

/**
 * 查询索引
 */
@Test
public void getIndex() {
    GetResponse getResponse = client.prepareGet("book", "java", "1").get();
    System.out.println(getResponse.getSourceAsString());
}