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程序问答发布时间：2022-06-02 发布网站：大佬教程 code.js-code.com

大佬教程收集整理的这篇文章主要介绍了Elastic search父子数据搜索Java API，大佬教程大佬觉得挺不错的，现在分享给大家，也给大家做个参考。

如何解决Elastic search父子数据搜索Java API？

开发过程中遇到Elastic search父子数据搜索Java API的问题如何解决？下面主要结合日常开发的经验，给出你关于Elastic search父子数据搜索Java API的解决方法建议，希望对你解决Elastic search父子数据搜索Java API有所启发或帮助；

首先使用parent/child映射设置索引。在下面的映射中，我还添加了一个未标记的字段，categorIEs以便您可以对该字段执行过滤器查询。（对于创建索引和文档，我使用的是JsONAPI而不是JavaAPI，因为这不是问题的一部分。）

POST /test
{
    "mapPings": {
        "book": {
            "_parent": {
                "type": "author"
            },
            "propertIEs":{
                "category":{
                    "type":"String",
                    "fIElds":{
                        "raw":{
                            "type":"String",
                            "index": "not_analyzed"
                        }
                    }
                }
            }
        }
    }
}

创建一些author文档：

POST /test/author/1
{
    "name": "jon doe"
}


POST /test/author/2
{
    "name": "jane smith"
}

创建一些book文档，指定请求之间book和之间的关系author。

POST /test/book/12?parent=1
{
    "name": "fictional book",
    "category": "Fiction",
    "publisher": "publisher1"
}

POST /test/book/16?parent=2
{
    "name": "book of history",
    "category": "historical",
    "publisher": "publisher2"
}

POST /test/book/20?parent=2
{
    "name": "second fictional book",
    "category": "Fiction",
    "publisher": "publisher2"
}

下面的java类执行3个查询：

搜索books标题中带有“ book”一词的所有内容，然后返回authors。
搜索名称中所有authors带有“ jon doe”字样的内容，然后返回books。
搜索books“ jane smith”写的且类型为Fiction的内容。

您可以从命令行运行该类，也可以将其导入Eclipse，然后右键单击该类，然后选择“运行方式> Java应用程序”。（您需要在类路径中有Elasticsearch库。）

import java.util.concurrent.ExecutionException;

import org.elasticsearch.action.search.SearchrequestBuilder;
import org.elasticsearch.action.search.SearchResponse;
import org.elasticsearch.clIEnt.ClIEnt;
import org.elasticsearch.clIEnt.transport.TransportClIEnt;
import org.elasticsearch.common.setTings.ImmutableSetTings;
import org.elasticsearch.common.setTings.SetTings;
import org.elasticsearch.common.transport.InetSocketTransportAddress;
import org.elasticsearch.index.query.FilterBuilders;
import org.elasticsearch.index.query.HasChildqueryBuilder;
import org.elasticsearch.index.query.HasParentqueryBuilder;
import org.elasticsearch.index.query.queryBuilders;
import org.elasticsearch.index.query.TermFilterBuilder;

public class ParentChildqueryExample {

  public static voID main(String args[]) throws InterruptedException, ExecutionException {

    //Set the Transport clIEnt which is used to communicate with your ES cluster. it is also possible to set this up using the ClIEnt Node.
    SetTings setTings = ImmutableSetTings.setTingsBuilder()
        .put("cluster.name", "elasticsearch").build();
    ClIEnt clIEnt = new TransportClIEnt(setTings)
        .addTransportAddress(new InetSocketTransportAddress(
        "localhost",
        9300));

    //create the searchrequestBuilder object.
    SearchrequestBuilder searchrequestBuilder = new SearchrequestBuilder(clIEnt).seTinDices("test");

    //query 1. Search on all books that have the term 'book' in the title and return the 'authors'.
    HasChildqueryBuilder booknamequery = queryBuilders.hasChildquery("book", queryBuilders.matchquery("name", "book"));
    System.out.println("Exectuing query 1");
    SearchResponse searchResponse1 = searchrequestBuilder.setquery(booknamequery).execute().actionGet();
    System.out.println("There were " + searchResponse1.getHits().get@R_535_10586@lHits()  + " results found for query 1.");
    System.out.println(searchResponse1.toString());
    System.out.println();

    //query 2. Search on all authors that have the terms 'jon doe' in the name and return the 'books'.
    HasParentqueryBuilder authornamequery = queryBuilders.hasParentquery("author", queryBuilders.matchquery("name", "jon doe"));
    System.out.println("Exectuing query 2");
    SearchResponse searchResponse2 = searchrequestBuilder.setquery(authornamequery).execute().actionGet();
    System.out.println("There were " + searchResponse2.getHits().get@R_535_10586@lHits()  + " results found for query 2.");
    System.out.println(searchResponse2.toString());
    System.out.println();

    //query 3. Search for books written by 'jane smith' and type Fiction.
    TermFilterBuilder termFilter = FilterBuilders.termFilter("category.raw", "Fiction");
    HasParentqueryBuilder authornamequery2 = queryBuilders.hasParentquery("author", queryBuilders.matchquery("name", "jane smith"));
    SearchResponse searchResponse3 = searchrequestBuilder.setquery(queryBuilders.filteredquery(authornamequery2, termFilter)).execute().actionGet();
    System.out.println("There were " + searchResponse3.getHits().get@R_535_10586@lHits()  + " results found for query 3.");
    System.out.println(searchResponse3.toString());
    System.out.println();
  }
}