ElasticSearch6.6.0强大的JAVA|ElasticSearch6.6.0强大的JAVA API详解
从maven导入
org.elasticsearch.client
elasticsearch-rest-high-level-client
6.6.0
参见文档地址
【ElasticSearch6.6.0强大的JAVA|ElasticSearch6.6.0强大的JAVA API详解】https://www.elastic.co/guide/en/elasticsearch/client/java-rest/6.6/java-rest-high.html
DEMO
package com.hengyi;
import org.apache.http.HttpHost;
import org.elasticsearch.action.ActionListener;
import org.elasticsearch.action.admin.indices.create.CreateIndexRequest;
import org.elasticsearch.action.admin.indices.create.CreateIndexResponse;
import org.elasticsearch.action.admin.indices.delete.DeleteIndexRequest;
import org.elasticsearch.action.admin.indices.get.GetIndexRequest;
import org.elasticsearch.action.admin.indices.get.GetIndexResponse;
import org.elasticsearch.action.delete.DeleteRequest;
import org.elasticsearch.action.delete.DeleteResponse;
import org.elasticsearch.action.get.GetRequest;
import org.elasticsearch.action.get.GetResponse;
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.action.support.master.AcknowledgedResponse;
import org.elasticsearch.action.update.UpdateRequest;
import org.elasticsearch.action.update.UpdateResponse;
import org.elasticsearch.client.RequestOptions;
import org.elasticsearch.client.RestClient;
import org.elasticsearch.client.RestHighLevelClient;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.common.unit.TimeValue;
import org.elasticsearch.index.query.QueryBuilders;
import org.elasticsearch.search.SearchHit;
import org.elasticsearch.search.SearchHits;
import org.elasticsearch.search.builder.SearchSourceBuilder;
import org.junit.jupiter.api.Test;
import java.util.Arrays;
import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.TimeUnit;
public class EsTest {/**
* 创建Index
*/
@Test
public void createIndex() throws Exception{
RestHighLevelClient client = new RestHighLevelClient(RestClient.builder(new HttpHost("192.168.199.213", 9200, "http")));
//初始化
CreateIndexRequest request = new CreateIndexRequest("employee");
//创建索引
//创建的每个索引都可以有与之关联的特定设置。
request.settings(Settings.builder()
.put("index.number_of_shards", 3)
.put("index.number_of_replicas", 2)
);
//可选参数
//request.timeout(TimeValue.timeValueMinutes(2));
//超时,等待所有节点被确认(使用TimeValue方式)
//request.timeout("2m");
//超时,等待所有节点被确认(使用字符串方式)
request.masterNodeTimeout(TimeValue.timeValueMinutes(1));
//连接master节点的超时时间(使用TimeValue方式)
//request.masterNodeTimeout("1m");
//连接master节点的超时时间(使用字符串方式)
//request.waitForActiveShards(2);
//在创建索引API返回响应之前等待的活动分片副本的数量，以int形式表示。CreateIndexResponse createIndexResponse = client.indices().create(request, RequestOptions.DEFAULT);
client.close();
System.out.println("isAcknowledged:" + createIndexResponse.isAcknowledged());
System.out.println("isShardsAcknowledged:" + createIndexResponse.isShardsAcknowledged());
}/**
* 删除索引
* @throws Exception
*/
@Test
public void deleteIndex() throws Exception{
RestHighLevelClient client = new RestHighLevelClient(RestClient.builder(new HttpHost("192.168.199.213", 9200, "http")));
//初始化
DeleteIndexRequest request = new DeleteIndexRequest("goods");
request.timeout(TimeValue.timeValueMinutes(2));
//request.timeout("2m");
request.masterNodeTimeout(TimeValue.timeValueMinutes(1));
//request.masterNodeTimeout("1m");
AcknowledgedResponse deleteIndexResponse = client.indices().delete(request, RequestOptions.DEFAULT);
System.out.println("isAcknowledged:" + deleteIndexResponse.isAcknowledged());
client.close();
}/**
* 检查索引是否存在
* @throws Exception
*/
@Test
public void existIndex()throws Exception{
RestHighLevelClient client = new RestHighLevelClient(RestClient.builder(new HttpHost("192.168.199.213", 9200, "http")));
//初始化
GetIndexRequest request = new GetIndexRequest();
request.indices("goods");
boolean exists = client.indices().exists(request, RequestOptions.DEFAULT);
System.out.println("索引goods:"+exists);
client.close();
}/**
* 获取索引
* @throws Exception
*/
@Test
public void getIndex() throws Exception{
RestHighLevelClient client = new RestHighLevelClient(RestClient.builder(new HttpHost("192.168.199.213", 9200, "http")));
//初始化
GetIndexRequest request = new GetIndexRequest().indices("shop");
GetIndexResponse getIndexResponse = client.indices().get(request, RequestOptions.DEFAULT);
System.out.println(Arrays.toString(getIndexResponse.getIndices()));
client.close();
}/**
* 创建或者更新文档
* @throws Exception
*/
@Test
public void insertDocument()throws Exception{
RestHighLevelClient client = new RestHighLevelClient(RestClient.builder(new HttpHost("192.168.199.213", 9200, "http")));
//初始化Map jsonMap = new HashMap<>();
jsonMap.put("title", "完美的衣服");
jsonMap.put("create_date","2019-02-17");
IndexRequest request = new IndexRequest("shop", "goods", "2").source(jsonMap);
IndexResponse indexResponse = client.index(request, RequestOptions.DEFAULT);
System.out.println("id:"+indexResponse.getId());
client.close();
}/**
* 获取文档
* @throws Exception
*/
@Test
public void getDocument()throws Exception{
RestHighLevelClient client = new RestHighLevelClient(RestClient.builder(new HttpHost("192.168.199.213", 9200, "http")));
//初始化
GetRequest request = new GetRequest( "shop","goods","1");
GetResponse getResponse = client.get(request, RequestOptions.DEFAULT);
System.out.println("数据如下："+getResponse.getSource().toString());
client.close();
}/**
* 判断某一个文档是否存在
* @throws Exception
*/
@Test
public void existDocument() throws Exception{
RestHighLevelClient client = new RestHighLevelClient(RestClient.builder(new HttpHost("192.168.199.213", 9200, "http")));
//初始化
GetRequest request = new GetRequest( "shop","goods","1");
boolean exists = client.exists(request, RequestOptions.DEFAULT);
System.out.println("是否存在："+exists);
client.close();
}/**
* 删除文档
* @throws Exception
*/
@Test
public void deleteDocuemnt()throws Exception{
RestHighLevelClient client = new RestHighLevelClient(RestClient.builder(new HttpHost("192.168.199.213", 9200, "http")));
//初始化
DeleteRequest request = new DeleteRequest("shop", "goods", "2");
request.timeout(TimeValue.timeValueMinutes(2));
// request.timeout("2m");
DeleteResponse deleteResponse = client.delete(request, RequestOptions.DEFAULT);
System.out.println(deleteResponse.getSeqNo());
client.close();
}/**
* 更新文档
* @throws Exception
*/
@Test
public void updateDocument()throws Exception{
RestHighLevelClient client = new RestHighLevelClient(RestClient.builder(new HttpHost("192.168.199.213", 9200, "http")));
//初始化
Map jsonMap = new HashMap<>();
jsonMap.put("title", "完美的衣服222");
jsonMap.put("create_date","2019-02-17");
UpdateRequest request = new UpdateRequest("shop", "goods", "1").doc(jsonMap);
UpdateResponse updateResponse = client.update(request, RequestOptions.DEFAULT);
System.out.println(updateResponse.getId());
client.close();
}/**
* 条件搜索
* @throws Exception
*/
@Test
public void searchDocument()throws Exception{
RestHighLevelClient client = new RestHighLevelClient(RestClient.builder(new HttpHost("192.168.199.213", 9200, "http")));
//初始化
SearchRequest request = new SearchRequest();
request.indices("shop");
SearchSourceBuilder sourceBuilder = new SearchSourceBuilder();
sourceBuilder.query(QueryBuilders.matchQuery("title", "鞋子"));
## 排序start
sourceBuilder.sort(new ScoreSortBuilder().order(SortOrder.DESC));
sourceBuilder.sort(new FieldSortBuilder("_uid").order(SortOrder.ASC));
## 排序end
sourceBuilder.from(0);
sourceBuilder.size(5);
sourceBuilder.timeout(new TimeValue(60, TimeUnit.SECONDS));
request.source(sourceBuilder);
SearchResponse searchResponse = client.search(request, RequestOptions.DEFAULT);
SearchHits hits = searchResponse.getHits();
SearchHit[] searchHits = hits.getHits();
System.out.println("SearchHit:" + searchHits.length);
for(SearchHit hit : searchHits){
Map datas = hit.getSourceAsMap();
System.out.println(datas.toString());
}client.close();
}
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