java 查询es数据_es之java各种查询操作

在 Java 中，可以使用 Elasticsearch 的 Java 客户端 API 进行各种查询操作。下面是一些常见的查询操作示例：

1. 基本查询

SearchRequest searchRequest = new SearchRequest("index_name"); 
SearchSourceBuilder searchSourceBuilder = new SearchSourceBuilder(); 
searchSourceBuilder.query(QueryBuilders.matchQuery("field_name", "search_text")); 
searchRequest.source(searchSourceBuilder); 
SearchResponse searchResponse = client.search(searchRequest, RequestOptions.DEFAULT);

2. 多条件查询

BoolQueryBuilder boolQuery = QueryBuilders.boolQuery(); 
boolQuery.must(QueryBuilders.termQuery("field_name", "value1")); 
boolQuery.must(QueryBuilders.termQuery("field_name", "value2")); 
searchSourceBuilder.query(boolQuery);

3. 范围查询

RangeQueryBuilder rangeQuery = QueryBuilders.rangeQuery("field_name"); 
rangeQuery.gte("min_value"); 
rangeQuery.lte("max_value"); 
searchSourceBuilder.query(rangeQuery);

4. 模糊查询

FuzzyQueryBuilder fuzzyQuery = QueryBuilders.fuzzyQuery("field_name", "search_text"); 
searchSourceBuilder.query(fuzzyQuery);

5. 高亮查询

HighlightBuilder highlightBuilder = new HighlightBuilder(); 
highlightBuilder.field("field_name"); 
highlightBuilder.preTags("<em>"); 
highlightBuilder.postTags("</em>"); 
searchSourceBuilder.highlighter(highlightBuilder);

以上是常见的查询操作示例，你可以根据自己的需求进行调整和组合。