目录
一、开发环境
二、pom文件
三、ES配置文件
四、ES相关字段
五、ES半径查询
ES的字段类型:geo_point，可以实现以一个点为中心的半径查询(geo_distance query)
ES 地里位置查询:
- 半径查询(geo_distance query)
- 查询指定矩形内的数据(geo_bounding_box query)
- 查询指定多边形内的数据(geo_polygon query)
官方文档：Geo queries | Elasticsearch Guide [8.14] | Elastic
本案例实现以某个点的经纬，查询半径查询，并计算出其他点和中心点的距离
一、开发环境
| 工具 | 版本 |
| JDK | 21 |
| SpringBoot | 3.2.4 |
| ElasticSearch | 8.13.2 |
二、pom文件
<!-- Elasticsearch Java API Client --><dependency><groupId>co.elastic.clients</groupId><artifactId>elasticsearch-java</artifactId><version>8.13.2</version></dependency>三、ES配置文件
properties:
import lombok.Data;
import org.springframework.boot.context.properties.ConfigurationProperties;import java.util.List;/*** ES 配置属性** @author meng* @date 2024-05-07*/
@Data
@ConfigurationProperties(prefix = "es")
public class ElasticsearchProperties {/*** es 请求方式*/private String scheme;/*** es 集群host ip 地址*/private List<String> hosts;/*** es 账号*/private String username;/*** es 密码*/private String password;/*** es 连接超时时间*/private Integer connectTimeOut;/*** es socket 连接超时时间*/private Integer socketTimeOut;/*** es 请求超时时间*/private Integer connectionRequestTimeOut;/*** es 最大连接数*/private Integer maxConnectNum;/*** es 每个路由的最大连接数*/private Integer maxConnectNumPerRoute;
}
config:
import co.elastic.clients.elasticsearch.ElasticsearchClient;
import co.elastic.clients.json.jackson.JacksonJsonpMapper;
import co.elastic.clients.transport.ElasticsearchTransport;
import co.elastic.clients.transport.rest_client.RestClientTransport;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.StringUtils;
import org.apache.http.HttpHost;
import org.apache.http.auth.AuthScope;
import org.apache.http.auth.UsernamePasswordCredentials;
import org.apache.http.client.CredentialsProvider;
import org.apache.http.conn.ssl.NoopHostnameVerifier;
import org.apache.http.impl.client.BasicCredentialsProvider;
import org.apache.http.ssl.SSLContextBuilder;
import org.apache.http.ssl.TrustStrategy;
import org.elasticsearch.client.RestClient;
import org.elasticsearch.client.RestClientBuilder;
import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
import org.springframework.boot.context.properties.EnableConfigurationProperties;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;import javax.net.ssl.SSLContext;
import java.security.KeyManagementException;
import java.security.KeyStoreException;
import java.security.NoSuchAlgorithmException;
import java.time.Duration;/*** ES 配置类，当 es.enable=true 时自动配置** @author meng* @date 2024-05-07*/
@Slf4j
@Configuration
@EnableConfigurationProperties(value = ElasticsearchProperties.class)
@ConditionalOnProperty(prefix = "es", name = "enable")
public class ElasticsearchConfig {@Bean(name = "ElasticsearchClient")public ElasticsearchClient initClient(ElasticsearchProperties elasticsearchProperties) {HttpHost[] esHosts = elasticsearchProperties.getHosts().stream().filter(StringUtils::isNotBlank).map(it -> {String[] split = it.split(":");return new HttpHost(split[0], Integer.parseInt(split[1]), elasticsearchProperties.getScheme());}).toArray(HttpHost[]::new);final CredentialsProvider credentialsProvider = new BasicCredentialsProvider();credentialsProvider.setCredentials(AuthScope.ANY,new UsernamePasswordCredentials(elasticsearchProperties.getUsername(),elasticsearchProperties.getPassword()));RestClientBuilder restClientBuilder = RestClient.builder(esHosts);// 连接延时配置restClientBuilder.setRequestConfigCallback(requestConfigBuilder -> {requestConfigBuilder.setConnectTimeout(elasticsearchProperties.getConnectTimeOut());requestConfigBuilder.setSocketTimeout(elasticsearchProperties.getSocketTimeOut());requestConfigBuilder.setConnectionRequestTimeout(elasticsearchProperties.getConnectionRequestTimeOut());return requestConfigBuilder;});// HttpClient 连接数配置restClientBuilder.setHttpClientConfigCallback(httpClientBuilder -> {httpClientBuilder.setMaxConnTotal(elasticsearchProperties.getMaxConnectNum());httpClientBuilder.setMaxConnPerRoute(elasticsearchProperties.getMaxConnectNumPerRoute());return httpClientBuilder;});// 设置keepalive时间restClientBuilder.setHttpClientConfigCallback(requestConfig ->requestConfig.setKeepAliveStrategy((response, context) -> Duration.ofMinutes(3).toMillis()));// 忽略HTTPS方式链接，SSL证书、主机名验证器restClientBuilder.setHttpClientConfigCallback(httpAsyncClientBuilder -> {httpAsyncClientBuilder.disableAuthCaching();httpAsyncClientBuilder.setDefaultCredentialsProvider(credentialsProvider);try {// 创建一个信任所有证书的 TrustStrategy 策略TrustStrategy acceptTrustStrategy = (chain, authType) -> true;// 使用 SSLContextBuilder 创建 SSLContextSSLContext sslContext = SSLContextBuilder.create().loadTrustMaterial(null, acceptTrustStrategy).build();httpAsyncClientBuilder.setSSLContext(sslContext);} catch (NoSuchAlgorithmException | KeyStoreException | KeyManagementException e) {e.printStackTrace();}// 忽略主机名验证httpAsyncClientBuilder.setSSLHostnameVerifier(NoopHostnameVerifier.INSTANCE);return httpAsyncClientBuilder;});RestClient restClient = restClientBuilder.build();// 使用Jackson映射器创建传输层ElasticsearchTransport transport = new RestClientTransport(restClient, new JacksonJsonpMapper());ElasticsearchClient client = new ElasticsearchClient(transport);return client;}}
四、ES相关字段
五、ES半径查询
具体查询对象，可自行定义，本方法只提供思路，莫直接粘贴使用
@Resourceprivate ElasticsearchClient esClient;/*** 功能描述: 根据经纬度判断十米内是否有poi数据** @Param: [request]* @Author: meng* @Date: 2024/6/6 19:57*/private PoiDTO getPoiNear(PoiRequest request) {if (Objects.isNull(request.getLongitude()) && Objects.isNull(request.getLatitude())) {return null;}// 中心点查询GeoLocation geoLocation = new GeoLocation.Builder().latlon(l -> l.lon(request.getLongitude().doubleValue()).lat(request.getLatitude().doubleValue())).build();GeoDistanceQuery geoDistanceQuery = GeoDistanceQuery.of(geoDis -> geoDis.field(PoiIndexConstant.LOCATION).location(geoLocation).distance(PoiIndexConstant.DISTANCE).distanceType(GeoDistanceType.Arc));// 排序List<SortOptions> sorts = new ArrayList<>();// 距离排序 米GeoDistanceSort geoDistanceSort = GeoDistanceSort.of(geoDis -> geoDis.field(PoiIndexConstant.LOCATION).location(geoLocation).order(SortOrder.Asc).unit(DistanceUnit.Meters));SortOptions sortOptions = SortOptions.of(sort -> sort.geoDistance(geoDistanceSort));sorts.add(sortOptions);SearchRequest.Builder searchRequestBuilder = new SearchRequest.Builder();searchRequestBuilder.index(PoiIndexConstant.INDEX_READ).query(query -> query.bool(builder -> builder.filter(f -> f.geoDistance(geoDistanceQuery)))).sort(sorts).size(CommonConstant.DEFAULT_NUM);// ES查询SearchRequest searchRequest = searchRequestBuilder.build();log.info("getPoiNear query:{}", searchRequest.toString());try {SearchResponse<PoiIndex> searchResponse = esClient.search(searchRequest, PoiIndex.class);// 未查到数据if (Objects.nonNull(searchResponse.hits().total()) && searchResponse.hits().total().value() == 0) {return null;}for (Hit<PoiIndex> hit : searchResponse.hits().hits()) {if (ObjectUtil.isNotNull(hit.source())) {PoiIndex poiIndex = BeanUtil.copyProperties(hit.source(), PoiIndex.class);return BeanUtil.copyProperties(poiIndex, PoiDTO.class);}}} catch (Exception e) {log.error("es searchRequest Exception:", e);throw new ServiceException("searchRequest Exception");}return null;}
