Elasticsearch 7 嵌套mapping创建及插入查询操作, 含JAVA操作
Elasticsearch 7 有些新特性，操作与老版本稍有不同
创建mapping
PUT /article_index
{
"mappings": {
"properties": {
"author":{ "type":"keyword"},
"title":{ "type":"keyword"},
"keyword":{ "type":"text"},
"comments": {
"type": "nested",
"properties": {
"name": { "type": "keyword" },
"comment": { "type": "text" },
"age": { "type": "short" },
"stars": { "type": "short" },
"date": { "type": "date" }
}
}
}
}
}
写入数据：
{
"author": "xxxx",
"title": "Nest coff",
"keyword": "nest kill",
"comments": [
{
"name": "John Smith",
"comment": "Great article",
"age": 28,
"stars": 4,
"date": "2017-09-01"
},
{
"name": "Alice White",
"comment": "More like this please",
"age": 31,
"stars": 5,
"date": "2014-10-22"
}
]
}PUT /article_index/_doc/2
{
"author": "xx1xx",
"title": "Fast road",
"keyword": "road kill",
"comments": [
{
"name": "tom",
"comment": "Great article",
"age": 23,
"stars": 1,
"date": "2017-09-01"
},
{
"name": "Big White",
"comment": "More like this please",
"age": 35,
"stars": 5,
"date": "2017-10-22"
}
]
}
查询：
嵌套查询：
GET /article_index/_search
{"from" : 0, "size" : 20,
"query": {
"nested": {
"path": "comments",
"query": {
"bool": {
"must": [
{
"match": {
"comments.name": "tom"
}
},
{
"match": {
"comments.age": 23
}
}
]
}
}
}
}
}
import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import java.util.concurrent.TimeUnit;import org.apache.http.HttpHost;
import org.apache.http.client.config.RequestConfig;
import org.apache.http.impl.nio.client.HttpAsyncClientBuilder;
import org.apache.http.impl.nio.reactor.IOReactorConfig;
import org.apache.lucene.search.TotalHits;
import org.apache.lucene.search.join.ScoreMode;
import org.elasticsearch.action.index.IndexRequest;
import org.elasticsearch.action.index.IndexResponse;
import org.elasticsearch.action.search.SearchRequest;
import org.elasticsearch.action.search.SearchResponse;
import org.elasticsearch.client.RequestOptions;
import org.elasticsearch.client.RestClient;
import org.elasticsearch.client.RestClientBuilder;
import org.elasticsearch.client.RestHighLevelClient;
import org.elasticsearch.common.unit.TimeValue;
import org.elasticsearch.common.xcontent.XContentType;
import org.elasticsearch.index.query.QueryBuilders;
import org.elasticsearch.search.SearchHit;
import org.elasticsearch.search.SearchHits;
import org.elasticsearch.search.builder.SearchSourceBuilder;
import com.fasterxml.jackson.databind.ObjectMapper;/**
*
* @author hsn
*
*/public class Es7Test1 {
public static void main(String[] args) throws IOException {
// Client
RestClientBuilder restClientBuilder = RestClient.builder(new HttpHost("192.168.37.139", 9200))
.setRequestConfigCallback(new RestClientBuilder.RequestConfigCallback() {
@Override
public RequestConfig.Builder customizeRequestConfig(RequestConfig.Builder requestConfigBuilder) {
return requestConfigBuilder.setConnectTimeout(5000) // 连接超时（默认为1秒）
.setSocketTimeout(60000);// 套接字超时（默认为30秒）
}
})
// .setMaxRetryTimeoutMillis(60000)//调整最大重试超时时间（默认为30秒）
.setHttpClientConfigCallback(new RestClientBuilder.HttpClientConfigCallback() {
@Override
public HttpAsyncClientBuilder customizeHttpClient(HttpAsyncClientBuilder httpClientBuilder) {
return httpClientBuilder
.setDefaultIOReactorConfig(IOReactorConfig.custom().setIoThreadCount(1).build());// 线程数
}
});
RestHighLevelClient client = new RestHighLevelClient(restClientBuilder);Article article = new Article();
Comments comments = new Comments();
comments.setAge(18);
comments.setComment("good!!!");
SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
// Date date =new Date();
comments.setDate(new Date());
comments.setStars(3);
comments.setName("zhang");
Listl = new ArrayList ();
l.add(comments);
article.setComments(l);
article.setAuthor("xxxx");
article.setKeyword("hk kill tom new");
article.setTitle("love me");String jsonData = new ObjectMapper().writeValueAsString(article);
IndexRequest indexRequest = new IndexRequest("article_index").id("13").source(jsonData, XContentType.JSON);
IndexResponse indexResponse = client.index(indexRequest, RequestOptions.DEFAULT);
String index = indexResponse.getIndex();
String id = indexResponse.getId();
long version = indexResponse.getVersion();
System.out.println(index);
System.out.println(id);
System.out.println(version);
SearchSourceBuilder searchSourceBuilder = new SearchSourceBuilder();
searchSourceBuilder.query(QueryBuilders.matchAllQuery());
searchSourceBuilder.query(QueryBuilders.termQuery("author", "xxxx"));
searchSourceBuilder.from(0);//设置from确定结果索引的选项以开始搜索。默认为0
searchSourceBuilder.size(10);//设置size确定要返回的搜索匹配数的选项。默认为10
searchSourceBuilder.timeout(new TimeValue(60, TimeUnit.SECONDS));
SearchRequest searchRequest = new SearchRequest();
searchRequest.indices("article_index");
searchRequest.source(searchSourceBuilder);
SearchResponse searchResponse = client.search(searchRequest, RequestOptions.DEFAULT);
SearchHits hits = searchResponse.getHits();
TotalHits totalHits = hits.getTotalHits();
long numHits = totalHits.value;
TotalHits.Relation relation = totalHits.relation;
System.out.println("numHits:"+numHits);
//嵌套查询
SearchRequest request = new SearchRequest("article_index")
.source(new SearchSourceBuilder().query(QueryBuilders.boolQuery()
.should(QueryBuilders.matchQuery("author", "xxxx"))
.should(QueryBuilders.matchQuery("title", "Nest coff"))
.should(QueryBuilders.nestedQuery("comments", QueryBuilders.matchQuery("age", "31"),ScoreMode.Total))));
searchResponse = client.search(searchRequest, RequestOptions.DEFAULT);
hits = searchResponse.getHits();
totalHits = hits.getTotalHits();
numHits = totalHits.value;
relation = totalHits.relation;
System.out.println("numHits----:"+numHits);
SearchHit [] searchHits = hits.getHits();
for(SearchHit hit:searchHits){
//使用SearchHit做一些事情
index = hit.getIndex();
id = hit.getId();
float score = hit.getScore();
System.out.println(hit.getSourceAsString());
}
// 关闭连接
client.close();
}
}
代码请参考：https://github.com/hsn999/Elasticsearch_7_springboot_demo