Elasticsearch - 在 Java 中输入查询

如何解决Elasticsearch - 在 Java 中输入查询

以下查询获取索引“geoshapes”中位置为 {32.0,34.0} 的所有文档，我如何在 java 中执行相同操作？

df1 <- structure(list(household_ID = 1:3,dog = c(0L,1L,0L),cat = c(1L,0L,cow = c(1L,0L)),class = "data.frame",row.names = c(NA,-3L))

df2 <- structure(list(oldname = c("dog","cat","cow"),newname = c("canine","feline","bovine")),-3L))

df1new <- structure(list(household_ID = 1:3,dog1 = c(0L,cat1 = c(1L,cow1 = c(1L,dog2 = c(0,1,0),cat2 = c(1,0)),-3L),class = "data.frame")

解决方法

您需要将一个库导入到您的项目中，该库知道如何与 ElasticSearch 实例通信并以编程方式（即通过您的 Java 代码）执行这些查询。换句话说，您需要 Java 客户端。

看看：https://www.elastic.co/guide/en/elasticsearch/client/java-rest/7.13/index.html

将库导入项目后，您可以：

import org.elasticsearch.action.search.SearchRequest;
import org.elasticsearch.common.geo.ShapeRelation;
import org.elasticsearch.common.geo.builders.CoordinatesBuilder;
import org.elasticsearch.common.geo.builders.MultiPointBuilder;
import org.elasticsearch.index.query.BoolQueryBuilder;
import org.elasticsearch.index.query.GeoShapeQueryBuilder;
import org.elasticsearch.index.query.QueryBuilders;
import org.elasticsearch.search.builder.SearchSourceBuilder;

import static org.elasticsearch.index.query.QueryBuilders.geoShapeQuery;
import static org.elasticsearch.index.query.QueryBuilders.matchAllQuery;

BoolQueryBuilder query1 = QueryBuilders.boolQuery();

GeoShapeQueryBuilder qb = geoShapeQuery(
        "location",new MultiPointBuilder(
                new CoordinatesBuilder()
                        .coordinate(32.0,34.0)
                        .build()));

qb.relation(ShapeRelation.CONTAINS);

query1.filter(qb).must(matchAllQuery());

SearchRequest searchRequest = new SearchRequest("geoshapes");
SearchSourceBuilder searchSourceBuilder = new SearchSourceBuilder();
searchSourceBuilder.query(query1);
searchRequest.source(searchSourceBuilder);

Elastic 在客户端上有 documentation 对您有用。