elasticsearch(7) : javaApi

<dependency>
    <groupId>commons-beanutils</groupId>
    <artifactId>commons-beanutils</artifactId>
    <version>1.9.3</version>
</dependency>
<dependency>
    <groupId>org.elasticsearch.client</groupId>
    <artifactId>elasticsearch-rest-high-level-client</artifactId>
    <version>7.4.2</version>
    <exclusions>
        <exclusion>
            <groupId>org.elasticsearch</groupId>
            <artifactId>elasticsearch</artifactId>
        </exclusion>
        <exclusion>
            <groupId>org.elasticsearch.client</groupId>
            <artifactId>elasticsearch-rest-client</artifactId>
        </exclusion>
    </exclusions>
</dependency>
<dependency>
    <groupId>org.elasticsearch.client</groupId>
    <artifactId>elasticsearch-rest-client</artifactId>
    <version>7.4.2</version>
</dependency>
<dependency>
    <groupId>org.elasticsearch</groupId>
    <artifactId>elasticsearch</artifactId>
    <version>7.4.2</version>
</dependency>

springboot java代码

import com.alibaba.fastjson.JSON;
import com.aliyun.autodeploy.agent.service.bo.LogSourceBO;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.beanutils.BeanUtils;
import org.apache.http.HttpHost;
import org.apache.http.client.config.RequestConfig;
import org.elasticsearch.action.bulk.BulkRequest;
import org.elasticsearch.action.bulk.BulkResponse;
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.xcontent.XContentType;
import org.elasticsearch.index.query.QueryBuilder;
import org.elasticsearch.index.query.QueryBuilders;
import org.elasticsearch.search.SearchHit;
import org.elasticsearch.search.builder.SearchSourceBuilder;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Service;
 
import javax.annotation.PostConstruct;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
 
/**
 * @Author: liyue
 * @Date: 2021/12/10/17:41
 * @Description:
 */
@Service
@Slf4j
public class ElasticsearchService {
 
    private RestHighLevelClient restHighLevelClient;
 
    @Value("${es.hostname}")
    private String esHostname;
 
    @Value("${es.port}")
    private Integer esPort;
 
    @PostConstruct
    private void run() {
        // 设置IP
        HttpHost esHost = new HttpHost(esHostname, esPort);
        RestClientBuilder restClientBuilder = RestClient.builder(esHost);
        setTimeout(restClientBuilder);
        restHighLevelClient = new RestHighLevelClient(restClientBuilder);
    }
 
    /**
     * 设置超时时间
     */
    private void setTimeout(RestClientBuilder restClientBuilder) {
        restClientBuilder.setRequestConfigCallback(new RestClientBuilder.RequestConfigCallback() {
            @Override
            public RequestConfig.Builder customizeRequestConfig(RequestConfig.Builder builder) {
                return builder.setConnectTimeout(3000)
                        .setSocketTimeout(50000);
            }
        });
    }
 
    /**
     * 新增
     * @return 保存结果
     * @throws Exception exception
     */
    public IndexResponse save(Object o, String index){
        try {
            IndexRequest indexRequest = new IndexRequest(index);
            indexRequest.source(JSON.toJSONString(o), XContentType.JSON);
            indexRequest.id();
            return restHighLevelClient.index(indexRequest, RequestOptions.DEFAULT);
        } catch (Exception e) {
            log.error("插入数据失败",e);
            return null;
        }
    }
 
    /**
     * 批量新增
     *
     * @param list       数据list
     * @return 返回保存结果
     * @throws Exception exception
     */
    public BulkResponse batchSave(List<LogSourceBO> list, String index){
        try {
            log.info("数据发送ES,size:{},index:{}",list.size(),index);
            BulkRequest bulkRequest = new BulkRequest();
            IndexRequest indexRequest;
            for (LogSourceBO item : list) {
                indexRequest = new IndexRequest(index);
                indexRequest.source(JSON.toJSONString(item), XContentType.JSON);
                indexRequest.id();
                bulkRequest.add(indexRequest);
            }
            return restHighLevelClient.bulk(bulkRequest, RequestOptions.DEFAULT);
        }catch (Exception e){
            log.error("批量保存失败",e);
            return null;
        }
 
    }
 
    /**
     * 查询符合查询条件的所有数据
     *
     * @return 返回结果list
     * @throws Exception exception
     */
    public List<LogSourceBO> query(Long startTime, Long endTime, String index) {
        List<LogSourceBO> logSourceBOS = new LinkedList<>();
        try {
            SearchRequest request = new SearchRequest();
            request.indices(index);
            SearchSourceBuilder searchSourceBuilder = new SearchSourceBuilder();
            QueryBuilder queryBuilder = QueryBuilders.boolQuery()
                    .must(QueryBuilders.rangeQuery("timestamp")
                            .gte(startTime)
                            .lte(endTime));
            searchSourceBuilder.query(queryBuilder);
            request.source(searchSourceBuilder);
            SearchResponse res = restHighLevelClient.search(request, RequestOptions.DEFAULT);
            if (res.getHits().getHits() != null) {
                SearchHit[] hits = res.getHits().getHits();
                for (SearchHit hit : hits) {
                    Map<String, Object> resultOne = hit.getSourceAsMap();
                    logSourceBOS.add(convertMap2Model(resultOne));
                }
            }
        }catch (Exception e){
            log.error("查询失败",e);
        }
        return logSourceBOS;
 
    }
 
 
    private LogSourceBO convertMap2Model(Map<String, Object> map) throws Exception {
        LogSourceBO logSourceBO = new LogSourceBO();
        BeanUtils.populate(logSourceBO, map);
        return logSourceBO;
    }
}

https://blog.csdn.net/Lxinccode/article/details/121934702

https://blog.csdn.net/qq_30468551/article/details/118120336

https://www.cnblogs.com/qlqwjy/p/13520785.html

https://mp.weixin.qq.com/s/EYEw101cmFfqWK_jcuG9MQ