引入依赖

引入的依赖版本必须和正在运行的Elasticsearch版本一致

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<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

连接Elasticsearch

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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();
}
}
}

增加索引并且在这个索引下添加文档

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@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());
}

删除索引

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@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());
}

修改索引的文档

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@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());
}

查询索引文档

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