Elasticsearch对复杂嵌套查询的应用-nested
创建索引
PUT /area
{
"mappings": {
"_doc": {
"properties": {
"province": {
"type": "nested",
"properties": {
"name": {
"type": "text",
"analyzer": "ik_max_word"
},
"cities": {
"type": "nested",
"properties": {
"name": {
"type": "text",
"analyzer": "ik_max_word"
},
"district": {
"type": "nested",
"properties": {
"name": {
"type": "text",
"analyzer": "ik_max_word"
}
}
}
}
}
}
}
}
}
}
}
插入示例数据
PUT /area/_doc/1
{
"province": {
"name": "北京",
"cities": [
{
"name": "北京市",
"district": [
{
"name": "朝阳区"
},
{
"name": "海淀区"
},
{
"name": "丰台区"
},
{
"name": "大兴区"
},
{
"name": "房山区"
},
{
"name": "通州区"
},
{
"name": "延庆区"
},
{
"name": "昌平区"
},
{
"name": "密云区"
},
{
"name": "平谷区"
}
]
}
]
}
}
示例2
PUT /area/_doc/2
{
"province": {
"name": "辽宁省",
"cities": [
{
"name": "沈阳市",
"district": [
{
"name": "和平区"
},
{
"name": "皇姑区"
},
{
"name": "沈河区"
},
{
"name": "铁西区"
},
{
"name": "浑南区"
},
{
"name": "苏家屯区"
},
{
"name": "沈北新区"
},
{
"name": "大东区"
},
{
"name": "辽中区"
},
{
"name": "于洪区"
}
]
},
{
"name":"葫芦岛市",
"district":[
{"name":"连山区"},
{"name":"龙港区"},
{"name":"男票区"}
]
}
]
}
}
使用java完成对复杂嵌套的搜索
package com.cn.service.impl;
import com.cn.ES.ESManager;
import org.apache.lucene.search.join.ScoreMode;
import org.elasticsearch.action.search.SearchRequestBuilder;
import org.elasticsearch.action.search.SearchResponse;
import org.elasticsearch.client.Client;
import org.elasticsearch.index.query.*;
public class ProvinceInfoSearch {
public static void search() throws Exception {
String indexName = "area";
//ES连接
Client client = ESManager.ESClient();
String path="province.cities.district.name";
MatchQueryBuilder districtQuery= QueryBuilders.matchQuery("province.cities.district.name", "浑南");
BoolQueryBuilder boolQueryBuilder = new BoolQueryBuilder();
boolQueryBuilder.should(QueryBuilders.matchQuery("province.cities.name","北京"));
NestedQueryBuilder districtQueryNested = QueryBuilders.nestedQuery("province.cities.district", districtQuery, ScoreMode.None);
boolQueryBuilder.should(districtQueryNested);
NestedQueryBuilder province_city = QueryBuilders.nestedQuery("province.cities", boolQueryBuilder, ScoreMode.None);
NestedQueryBuilder provinceQueryBuilder = QueryBuilders.nestedQuery("province", province_city, ScoreMode.None);
SearchRequestBuilder srb = client.prepareSearch(indexName);
SearchResponse searchResponse = srb.setQuery(provinceQueryBuilder).get();
System.out.println(1111);
}
}
查询语句：
GET area/_search
{
"query": {
"nested": {
"path": "province",
"query": {
"nested": {
"path": "province.cities",
"query": {
"bool": {
"should": [
{
"match": {
"province.cities.name": "北京"
}
},
{
"nested": {
"path": "province.cities.district",
"query": {
"match": {
"province.cities.district.name": "浑南"
}
}
}
}
]
}
}
}
}
}
}
}
searchResponse 中包含的查询结果：
{
"took": 15,
"timed_out": false,
"_shards": {
"total": 5,
"successful": 5,
"skipped": 0,
"failed": 0
},
"_clusters": {
"total": 0,
"successful": 0,
"skipped": 0
},
"hits": {
"total": 2,
"max_score": 0,
"hits": [
{
"_index": "area",
"_type": "_doc",
"_id": "2",
"_score": 0,
"_source": {
"province": {
"name": "辽宁省",
"cities": [
{
"name": "沈阳市",
"district": [
{
"name": "和平区"
},
{
"name": "皇姑区"
},
{
"name": "沈河区"
},
{
"name": "铁西区"
},
{
"name": "浑南区"
},
{
"name": "苏家屯区"
},
{
"name": "沈北新区"
},
{
"name": "大东区"
},
{
"name": "辽中区"
},
{
"name": "于洪区"
}
]
},
{
"name": "葫芦岛市",
"district": [
{
"name": "连山区"
},
{
"name": "龙港区"
},
{
"name": "男票区"
}
]
}
]
}
}
},
{
"_index": "area",
"_type": "_doc",
"_id": "1",
"_score": 0,
"_source": {
"province": {
"name": "北京",
"cities": [
{
"name": "北京市",
"district": [
{
"name": "朝阳区"
},
{
"name": "海淀区"
},
{
"name": "丰台区"
},
{
"name": "大兴区"
},
{
"name": "房山区"
},
{
"name": "通州区"
},
{
"name": "延庆区"
},
{
"name": "昌平区"
},
{
"name": "密云区"
},
{
"name": "平谷区"
}
]
}
]
}
}
}
]
}
}