es分词查询与模糊查询

Myth丶恋晨 2022-12-05 15:18 254阅读 0赞

1，目标

实现es分词查询与模糊查询

2.关于分词文章参考以下连接

[https://www.cnblogs.com/zlslch/p/6440373.html][https_www.cnblogs.com_zlslch_p_6440373.html]

3.索引字段定义

商品名称定义了中文分词器，因为名称为中文组成可以进行分词查询

商品编码定义精确查询

"product_name": {
    "type": "text",
    "fields": {
    "keyword": {
    "type": "keyword"
    },
    "maxword": {
    "analyzer": "ik_max_word",
    "type": "text"
    },
    "smart": {
    "analyzer": "ik_smart",
    "type": "text"
    }
    }

"product_code": {
    "type": "keyword"
    },

4.实现

1）商品编码，名称模糊查询

if (org.apache.commons.lang3.StringUtils.isNotBlank(req.getSearchKey())) {
                BoolQueryBuilder multiFiledQuery = QueryBuilders.boolQuery();
                multiFiledQuery.should(QueryBuilders.termsQuery(convertToUnderScore(ResPurchaseWideInfo::getProductCode), req.getSearchKey()));
                multiFiledQuery.should(new WildcardQueryBuilder(convertToUnderScore(ResPurchaseWideInfo::getProductCode), "*".concat(req.getSearchKey()).concat("*")));
                multiFiledQuery.should(new WildcardQueryBuilder(convertToUnderScore(ResPurchaseWideInfo::getProductName).concat(".keyword"), "*".concat(req.getSearchKey().concat("*"))));
                multiFiledQuery.should(QueryBuilders.termsQuery(convertToUnderScore(ResPurchaseWideInfo::getProductName).concat(".keyword"), req.getSearchKey()));
                multiFiledQuery.should(QueryBuilders.termsQuery(convertToUnderScore(ResPurchaseWideInfo::getBarCode), req.getSearchKey()));
                multiFiledQuery.minimumShouldMatch(1);
                boolQuery.must(multiFiledQuery);
            }

2）商品名称分词查询

if (StringUtils.isNumeric(vo.getSearchKey())) {//数字格式
                boolQueryBuilder.filter(QueryBuilders.termsQuery(convertToUnderScore(ResPurchaseWideInfo::getPurchaseGroupCode), vo.getPurchaseGroupCodes()))
                        .should(QueryBuilders.termQuery(convertToUnderScore(ResPurchaseWideInfo::getProductCode), vo.getSearchKey()))
                        .should(new WildcardQueryBuilder(convertToUnderScore(ResPurchaseWideInfo::getProductCode), "*".concat(vo.getSearchKey()).concat("*")))
                        .should(QueryBuilders.termQuery(convertToUnderScore(ResPurchaseWideInfo::getBarCode), vo.getSearchKey()))
                        .should(new WildcardQueryBuilder(convertToUnderScore(ResPurchaseWideInfo::getBarCode), "*".concat(vo.getSearchKey()).concat("*")))
                        .minimumShouldMatch(1);
            } else {//非数字格式
                boolQueryBuilder.filter(QueryBuilders.termsQuery(convertToUnderScore(ResPurchaseWideInfo::getPurchaseGroupCode), vo.getPurchaseGroupCodes()))
                        .must(QueryBuilders.queryStringQuery("product_name:" + vo.getSearchKey()).defaultOperator(QueryStringQueryBuilder.DEFAULT_OPERATOR));
            }

5.特别关注

1）名称模糊查询要拼接.keyword

2）es创建索引注意字段类型设计

为什么加.keyword原因参考：

[https://blog.csdn.net/qq\_22041375/article/details/100013844?utm\_medium=distribute.pc\_aggpage\_search\_result.none-task-blog-2~all~first\_rank\_v2~rank\_v25-1-100013844.nonecase&utm\_term=keyword%20字段%20查询不到][https_blog.csdn.net_qq_22041375_article_details_100013844_utm_medium_distribute.pc_aggpage_search_result.none-task-blog-2_all_first_rank_v2_rank_v25-1-100013844.nonecase_utm_term_keyword_20_20]

以上为例，为什么模糊查询商品名称不加.keyword查询不到数据

比如商品名称是"我是中国人"，查询条件为"中国人"，商品名称分词后可能为'我'，'是'，'中国'，‘人’，，那么\*中国人\*是查询不到数据的。但是一般字段加了ik\_samrt分词器，会进行比较粗粒度分词，我是中国人，会分出 ‘中国人’，一般是可以查询到的。

而加了.keyword就代表不会对商品名称进行分词了，模糊查询\*中国人\*肯定可以查询到的。

[https_www.cnblogs.com_zlslch_p_6440373.html]: https://www.cnblogs.com/zlslch/p/6440373.html
[https_blog.csdn.net_qq_22041375_article_details_100013844_utm_medium_distribute.pc_aggpage_search_result.none-task-blog-2_all_first_rank_v2_rank_v25-1-100013844.nonecase_utm_term_keyword_20_20]: https://blog.csdn.net/qq_22041375/article/details/100013844?utm_medium=distribute.pc_aggpage_search_result.none-task-blog-2~all~first_rank_v2~rank_v25-1-100013844.nonecase&utm_term=keyword%20%E5%AD%97%E6%AE%B5%20%E6%9F%A5%E8%AF%A2%E4%B8%8D%E5%88%B0