如何在ElasticSearch中使用Java API创建多个聚合

<dependency>
    <groupId>org.elasticsearch.client</groupId>
    <artifactId>elasticsearch-rest-high-level-client</artifactId>
    <version>7.15.1</version>
</dependency>

import org.elasticsearch.client.RestClient;
import org.elasticsearch.client.RestHighLevelClient;

RestHighLevelClient client = new RestHighLevelClient(
        RestClient.builder(new HttpHost("localhost", 9200, "http")));

import org.elasticsearch.action.search.SearchRequest;
import org.elasticsearch.index.query.QueryBuilders;

SearchRequest searchRequest = new SearchRequest("your_index_name");
searchRequest.source().query(QueryBuilders.matchAllQuery());

import org.elasticsearch.search.aggregations.AggregationBuilders;
import org.elasticsearch.search.aggregations.bucket.terms.TermsAggregationBuilder;

TermsAggregationBuilder aggregation1 = AggregationBuilders.terms("agg1").field("field1");
TermsAggregationBuilder aggregation2 = AggregationBuilders.terms("agg2").field("field2");

searchRequest.source().aggregation(aggregation1).aggregation(aggregation2);

import org.elasticsearch.action.search.SearchResponse;

SearchResponse searchResponse = client.search(searchRequest, RequestOptions.DEFAULT);

import org.elasticsearch.search.aggregations.Aggregations;
import org.elasticsearch.search.aggregations.bucket.terms.Terms;

Aggregations aggregations = searchResponse.getAggregations();
Terms agg1 = aggregations.get("agg1");
Terms agg2 = aggregations.get("agg2");

// 遍历聚合桶并获取聚合结果
for (Terms.Bucket bucket : agg1.getBuckets()) {
    String key = bucket.getKeyAsString();
    long docCount = bucket.getDocCount();
    // 处理聚合结果
}

for (Terms.Bucket bucket : agg2.getBuckets()) {
    String key = bucket.getKeyAsString();
    long docCount = bucket.getDocCount();
    // 处理聚合结果
}