es数据查询

最新推荐文章于 2025-10-15 21:29:43 发布

原创最新推荐文章于 2025-10-15 21:29:43 发布 · 750 阅读

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本文介绍如何利用RESTHighLevelClient进行Elasticsearch的搜索操作，通过构造搜索请求，包括设置索引、创建布尔查询并获取匹配字段的数据，最后解析搜索响应并迭代搜索结果。

RestClientBuilder builder = RestClient.builder(HttpHost.create("******"));
RestHighLevelClient restHighLevelClient = new RestHighLevelClient(builder);

final SearchSourceBuilder sourceBuilder = SearchSourceBuilder.searchSource();

BoolQueryBuilder boolQueryBuilder = QueryBuilders.boolQuery();
boolQueryBuilder.must().add(QueryBuilders.matchQuery("field","data"));
sourceBuilder.query(boolQueryBuilder);

String[] index = formatIndex(span);
SearchRequest searchRequest = new SearchRequest(index,sourceBuilder);

SearchResponse response = restHighLevelClient.search(searchRequest);

Iterator<SearchHit> searchHitIterator = response.getHits().iterator();
while (searchHitIterator.hasNext()){
      SearchHit searchHit = searchHitIterator.next();
      final Map<String, Object> sourceAsMap = searchHit.getSourceAsMap();
      d = sourceAsMap.get("message");
}