学习提高：Elasticsearch7.X 多层嵌套查询SpringBoot项目，源码示例，不区分大小写配置+搜索实现

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这里主要看如何进行配置不区分大小写以及搜索实现。

下面是setting的配置

  "index.max_result_window" : "10000000",
  "index.mapping.nested_objects.limit": "10000000",
  "index.refresh_interval":"1s",
   "analysis": {
           "normalizer": {
              "lowercase_normalizer": {
                "type": "custom",
                "char_filter": [],
                "filter": [
                 "lowercase"
                ]
            }
            }
          }}

属性上面引用配置

			/**
             * 区名称,举例：东南文化园A-a区
             */
            @Field(type = FieldType.Keyword, normalizer = "lowercase_normalizer")
            private String districtName;

代码示例

    @Autowired
    private ElasticsearchRestTemplate elasticsearchRestTemplate;
    @Test
    public void testSearch(){
        QueryBuilder provinceItemsQuery = QueryBuilders.nestedQuery("cityInfos.districtInfos",
                QueryBuilders.boolQuery()
                        // "东南文化园A-A区"
                        .should(QueryBuilders.matchQuery("cityInfos.districtInfos.districtName", "东南文化园a-a区")), 
                ScoreMode.Total);
        //构建分页
        NativeSearchQueryBuilder builder=new NativeSearchQueryBuilder();
        NativeSearchQuery query=builder.withQuery(provinceItemsQuery)
                .build();
        SearchHits<ProvinceInfoEntity> search = elasticsearchRestTemplate.search(query, ProvinceInfoEntity.class);
        Stream<SearchHit<ProvinceInfoEntity>> searchHitStream = search.get();
    }

传送门：
Elasticsearch多层级嵌套模糊搜索高亮关键词实现

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