如何使用Elasticsearch Java API创建通配符查询

Question

如何使用Elasticsearch创建通配符查询？我尝试了以下方法，但我认为它不起作用（我的意思是它没有过滤）。

BoolQueryBuilder boolQueryBuilder = QueryBuilders.boolQuery();
boolQueryBuilder.must(QueryBuilders.wildcardQuery("message", "ANG*"));

我也尝试了前缀方法，但也没有过滤任何结果。

boolQueryBuilder.must(QueryBuilders.prefixQuery("message", "ANG"));

编辑：

        "_index": "log4j_2017",
        "_type": "log4j",
        "_id": "fd23123122",
        "_score": null,
        "_source": {
           "date": "2017-03-10T19:04:50.049Z",
           "contextStack": [],
           "level": "INFO",
           "marker": null,
           "thrown": null,
           "message": "ANGServlet 'spring': initialization completed in 2314 ms",
           "millis": 1489151090049,
           "contextMap": {},
           "threadName": "http-apr-8080-exec-77"
         }

Answer 1

一个可能的原因是您分析了 message字段，并且该令牌以小写为单位，因此您需要这样搜索：

BoolQueryBuilder boolQueryBuilder = QueryBuilders.boolQuery();
boolQueryBuilder.must(QueryBuilders.wildcardQuery("message", "ang*"));

或

boolQueryBuilder.must(QueryBuilders.prefixQuery("message", "ang"));

Answer 2

在Java中添加多个通配符

SearchRequest searchRequest = new SearchRequest(Constant.ELASTIC_ROOM_INDEX);
SearchSourceBuilder searchSourceBuilder = new SearchSourceBuilder();BoolQueryBuilder boolQueryBuilder = QueryBuilders.boolQuery();
boolQueryBuilder.should(QueryBuilders.wildcardQuery("roomNo", "*" + searchText + "*")).boost(2);
boolQueryBuilder.should(QueryBuilders.wildcardQuery("location", "*" + searchText + "*")).boost(1);
searchSourceBuilder.query(QueryBuilders.boolQuery().must(boolQueryBuilder));
searchRequest.source(searchSourceBuilder);
SearchResponse searchResponse = client.search(searchRequest, RequestOptions.DEFAULT);
SearchHit[] searchHits = searchResponse.getHits().getHits();
for (SearchHit hit : searchHits) {
    Map<String, Object> sourceAsMap = hit.getSourceAsMap();
    Long roomId = ((Integer) sourceAsMap.get("roomId")).longValue();
    String roomNo = (String) sourceAsMap.get("roomNo");
    String location = (String) sourceAsMap.get("location");
    results.add(new SearchResultDTO(roomNo + ", " + location + ",Room", roomId));
}