ElasticSearch Java高级客户端RestHighLevelClient

添加依赖：
<dependency>
    <groupId>org.elasticsearch.client</groupId>
    <artifactId>elasticsearch-rest-high-level-client</artifactId>
    <version>7.6.2</version>
</dependency>

由于我使用的springboot版本对应的是6.8.5，所以maven中还要添加
<properties>
    <maven.compiler.source>1.8</maven.compiler.source>
    <maven.compiler.target>1.8</maven.compiler.target>
    <elasticsearch.version>7.6.2</elasticsearch.version>
</properties>

初始化：

@Configuration
public class ESClient {

    @Bean
    public RestHighLevelClient client(){
        RestHighLevelClient client = new RestHighLevelClient(
                RestClient.builder(
//                        new HttpHost("321.321.321.321", 9201, "http"),
                        new HttpHost("123.123.123.123", 9200, "http")));
        return client;
    }


}