**学习笔记（ElasticSearch）–java客户端连接腾讯云ElasticSearch

（纪念这次踩的坑）

近日，在腾讯云上免费购置了一台ElasticSearch实例拿来学习。发现一个重大问题：java客户端Restful API怎么也连不上腾讯云的elsaticsearch实例，各种教程也找了，客服也问了还是失败了。

现在问题总算解决了。
这是springboot集成ES的配置类

import org.apache.http.HttpHost;
import org.apache.http.auth.AuthScope;
import org.apache.http.auth.UsernamePasswordCredentials;
import org.apache.http.client.CredentialsProvider;
import org.apache.http.impl.client.BasicCredentialsProvider;
import org.apache.http.impl.nio.client.HttpAsyncClientBuilder;
import org.elasticsearch.client.RestClient;
import org.elasticsearch.client.RestClientBuilder;
import org.elasticsearch.client.RestHighLevelClient;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

@Configuration
public class ElasticSearchConfig {

    //配置elasticsearch客户端
    @Bean
    public RestHighLevelClient restHighLevelClient(){

        final CredentialsProvider credentialsProvider = new BasicCredentialsProvider();
        credentialsProvider.setCredentials(AuthScope.ANY,
                new UsernamePasswordCredentials("username","password"));

        RestClientBuilder builder = RestClient.builder(
                new HttpHost("公网地址（去掉https://）", 9200,"https"))
                .setHttpClientConfigCallback(new RestClientBuilder.HttpClientConfigCallback() {
                    @Override
                    public HttpAsyncClientBuilder customizeHttpClient(HttpAsyncClientBuilder httpAsyncClientBuilder) {
                        return httpAsyncClientBuilder.setDefaultCredentialsProvider(credentialsProvider);
                    }
                });

        return new RestHighLevelClient(builder);
    }
}