ElasticSearch6.6.2详解JavaApi

 https://www.elastic.co/guide/en/elasticsearch/client/java-rest/6.6/java-rest-high.html

使用版本ElasticSearch6.6.2,jdk8

<dependency>
    <groupId>org.elasticsearch.client</groupId>
    <artifactId>elasticsearch-rest-high-level-client</artifactId>
    <version>6.6.2</version>
</dependency>

package cn.elasticsearch662;

/** 
 * @author wangshiyu 
 * @Date 2019年7月24日 下午6:00:40 
 * 类说明 
 */
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.elasticsearch.search.sort.FieldSortBuilder;
import org.elasticsearch.search.sort.ScoreSortBuilder;
import org.elasticsearch.search.sort.SortOrder;
import org.junit.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("39.96.53.204", 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("39.96.53.204", 9200, "http")));// 初始化
        DeleteIndexRequest request = new DeleteIndexRequest("books2");
        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<String, Object> 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<String, Object> 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<String, Object> datas = hit.getSourceAsMap();
            System.out.println(datas.toString());
        }

        client.close();
    }
}