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Elasticsearch查詢之Term?Query示例解析

更新時(shí)間：2023年04月23日 15:40:04 作者：往之不諫

這篇文章主要為大家介紹了Elasticsearch查詢之Term?Query示例解析，有需要的朋友可以借鑒參考下，希望能夠有所幫助，祝大家多多進(jìn)步，早日升職加薪

Term Query

Term Query是一種最基本的查詢方式，它用于在Elasticsearch中查詢一個(gè)字段中包含指定關(guān)鍵詞的文檔，與MySQL中的等值查詢類似。使用Term Query時(shí)，可以對(duì)字段進(jìn)行完全匹配，且區(qū)分大小寫。

基本語法

GET /{index}/_search
{
    "query": {
        "term": {
            "{field}": "{value}"
        }
    }
}

其中，{index}表示查詢的索引名稱，{field}表示需要查詢的字段，{value}表示需要匹配的值。

Java代碼寫法

// TODO 省略導(dǎo)入包
import java.io.IOException;
public class TermQueryExample {
    public static void main(String[] args) throws IOException {
        RestHighLevelClient client = new RestHighLevelClient(
                RestClient.builder(
                        new HttpHost("localhost", 9200, "http")));
        SearchRequest searchRequest = new SearchRequest("my_index");
        // 這里的searchSourceBuilder 相當(dāng)于 query:{}
        SearchSourceBuilder searchSourceBuilder = new SearchSourceBuilder();
        // query:{term:{"field_name":"field_value"}}
        searchSourceBuilder.query(QueryBuilders.termQuery("field_name", "field_value"));
        searchSourceBuilder.timeout(new TimeValue(60, TimeUnit.SECONDS));
        searchRequest.source(searchSourceBuilder);
        // 執(zhí)行查詢
        SearchResponse searchResponse = client.search(searchRequest, RequestOptions.DEFAULT);
        // TODO: 解析搜索結(jié)果
        client.close();
    }
}

Terms-匹配多個(gè)值

term查詢只能用于匹配該屬性的單個(gè)值，若想匹配多個(gè)值，可以用terms查詢

基本語法

GET /{index}/_search
{
    "query": {
        "terms": {
            "{field}": [
                "{value1}",
                "{value2}",
                "{value3}"
            ]
        }
    }
}

Java寫法

SearchRequest searchRequest = new SearchRequest("index");
SearchSourceBuilder searchSourceBuilder = new SearchSourceBuilder();
// 注意這里是使用termsQuery("field",value1,value2)
TermsQueryBuilder termsQueryBuilder = QueryBuilders.termsQuery("field", "value1", "value2", "value3");
searchSourceBuilder.query(termsQueryBuilder);
searchRequest.source(searchSourceBuilder);
SearchResponse searchResponse = client.search(searchRequest, RequestOptions.DEFAULT);