引入jar包依赖

    <dependencies>
        <dependency>
            <groupId>org.elasticsearch</groupId>
            <artifactId>elasticsearch</artifactId>
            <version>7.8.0</version>
        </dependency>
        <!-- es客户端 -->
        <dependency>
            <groupId>org.elasticsearch.client</groupId>
            <artifactId>elasticsearch-rest-high-level-client</artifactId>
            <version>7.8.0</version>
        </dependency>
        <dependency>
            <groupId>org.apache.logging.log4j</groupId>
            <artifactId>log4j-api</artifactId>
            <version>2.8.2</version>
        </dependency>
        <dependency>
            <groupId>org.apache.logging.log4j</groupId>
            <artifactId>log4j-core</artifactId>
            <version>2.8.2</version>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-databind</artifactId>
            <version>2.9.9</version>
        </dependency>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.12</version>
        </dependency>
    </dependencies>

调用API创建Index

查询和删除Index

        GetIndexRequest request = new GetIndexRequest("user");
        GetIndexResponse response = client.indices().get(request, RequestOptions.DEFAULT);

        System.out.println("Aliases = " + response.getAliases());
        System.out.println("Mappings = " + response.getMappings());

        // 删除
        DeleteIndexRequest deleteRequest = new DeleteIndexRequest("user");
        AcknowledgedResponse deleteResp = client.indices().delete(deleteRequest, RequestOptions.DEFAULT);
        System.out.println("deleteResp = " + deleteResp.toString());