ElasticSearch----使用JavaAPI查询ES-创新互联
目录ElasticSearch版本:7.6.2
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Springboot版本:2.3.12.RELEASE
springboot、es版本对应关系
Elasticsearch Clients列表
Java High Level REST Client参考文档
- 引入依赖
- 实例化RestHighLevelClient
- 查询
- 多条件分组查询并对结果排序
org.springframework.boot spring-boot-starter-parent 2.3.12.RELEASE org.springframework.data spring-data-elasticsearch
实例化RestHighLevelClient@Configuration
public class ElasticSearchConfig {@Bean
public RestHighLevelClient restHighLevelClient() {return new RestHighLevelClient(
RestClient.builder(
new HttpHost("127.0.0.1", 9200, "http")));
}
}
查询
多条件分组查询并对结果排序@Test
public void testSearchGroupby() throws Exception{SearchRequest searchRequest = new SearchRequest("trafficlight_error_log");
SearchSourceBuilder searchSourceBuilder = new SearchSourceBuilder();
BoolQueryBuilder boolQueryBuilder = QueryBuilders.boolQuery();
boolQueryBuilder.must(QueryBuilders.rangeQuery("errorTime").gte("1673403774000").lte("1673414574000"));
searchSourceBuilder.query(boolQueryBuilder);
// 分组排序,size:分组之后前N条数据,sort:.key:按key排序;.count:按count结果排序
TermsAggregationBuilder termsAggregationBuilder = AggregationBuilders.terms("aIntersectionId_count").field(
"aIntersectionId").size(1000).order(BucketOrder.key(true));
TermsAggregationBuilder termsAggregationBuilder2 = AggregationBuilders.terms("errorMsg_count").field(
"errorMsg.keyword").order(BucketOrder.count(true));
// 多条件分组查询
termsAggregationBuilder.subAggregation(termsAggregationBuilder2);
searchSourceBuilder.aggregation(termsAggregationBuilder);
searchRequest.source(searchSourceBuilder);
SearchResponse searchResponse = restHighLevelClient.search(searchRequest, RequestOptions.DEFAULT);
// System.out.println(searchResponse.getAggregations().asMap().get("aIntersectionId_count").getClass().getSimpleName());
ParsedLongTerms aIntersectionId_count = (ParsedLongTerms) searchResponse.getAggregations().asMap().get("aIntersectionId_count");
Iterator extends Terms.Bucket>iterator = aIntersectionId_count.getBuckets().iterator();
// 遍历
while (iterator.hasNext()) {Terms.Bucket next = iterator.next();
System.out.println(next.getKey());
System.out.println(next.getDocCount());
// System.out.println(next.getAggregations().asMap().get("errorMsg_count").getClass().getSimpleName());
ParsedStringTerms terms = (ParsedStringTerms) next.getAggregations().asMap().get("errorMsg_count");
Iterator extends Terms.Bucket>iterator1 = terms.getBuckets().iterator();
while (iterator1.hasNext()) {Terms.Bucket next1 = iterator1.next();
System.out.println(next1.getKey());
System.out.println(next1.getDocCount());
}
System.out.println("+++++++++++++++++++++");
}
}
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