ElasticSearch 8.10.2 最新版 集成springboot，包括安全认证，使用Elasticsearch Java API Client，地理位置查询geoDistance

1、ElasticSearch 8.10.2 本地下载

下载地址：https://www.elastic.co/cn/downloads/past-releases/elasticsearch-8-10-2

2、运行

需要本地配置JAVA_HOME ：jdk17

解压后进入文件夹：

双击elasticsearch.bat，即可运行

运行成功后，浏览器输入：http://localhost:9200/

成功则显示下面信息：

不成功可以看下一步（关闭安全认证）

3、安全认证

在根目录下打开config文件夹

修改elasticsearch.yml文件

修改参数：xpack.security.enabled

若为false，则不需要安全认证，访问以 http 开头

若为true，则需要安全认证，访问以 https 开头，同时访问需要输入账号和密码。

账号密码设置：(前提：xpack.security.enabled ： true)

账号默认为：elastic

密码需要去设置，设置过程如下：

1、启动elasticsearch

2、在bin目录下启动cmd

敲击回车即可运行

然后输入：elasticsearch-reset-password -u elastic

输入y即可修改成功

密码自行保存下来。

3、重新启动elastisearch，即可成功修改密码。

4、集成springboot

pom依赖如下：

        
            org.elasticsearch.plugin
            x-pack-sql-jdbc
            8.10.2
        

        
            co.elastic.clients
            elasticsearch-java
            8.10.2
        

        
            com.fasterxml.jackson.core
            jackson-databind
            2.12.3
        

        
            jakarta.json
            jakarta.json-api
            2.0.1
        

        
            org.springframework.boot
            spring-boot-starter-web
            RELEASE
            compile
        
        
            cn.hutool
            hutool-all
            5.6.3
        
        
            com.alibaba.fastjson2
            fastjson2
            2.0.15
        
        
            org.apache.lucene
            lucene-core
            8.8.0
        

配置yml文件

spring:
  elasticsearch:
    rest:
      # 是否启用es
      enable: true
      uris: localhost:9200
      host: localhost
      port: 9200
      username: elastic
      password: HtGJDGu8LHcxHKPKG8RL // 你自己设置的密码
      index: indexName
      crtName: http_ca.crt

将安全证书放在resourses下面

安全证书位于：elasticsearch-8.10.2\config\certs

配置config（参考大佬：Geng）

package com.mqy.config;

import co.elastic.clients.elasticsearch.ElasticsearchAsyncClient;
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 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.SSLContexts;
import org.elasticsearch.client.RestClient;
import org.elasticsearch.client.RestClientBuilder;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.io.ClassPathResource;

import javax.annotation.PostConstruct;
import javax.net.ssl.SSLContext;
import java.io.IOException;
import java.io.InputStream;
import java.security.KeyManagementException;
import java.security.KeyStore;
import java.security.KeyStoreException;
import java.security.NoSuchAlgorithmException;
import java.security.cert.Certificate;
import java.security.cert.CertificateException;
import java.security.cert.CertificateFactory;

/**
 * es8的Java客户端配置
 * author：Geng
 */
@Configuration
//@Slf4j
public class ElasticSearchConfig {

    @Value("${spring.elasticsearch.rest.host}")
    private String host;
    @Value("${spring.elasticsearch.rest.enable}")
    private boolean enable;
    @Value("${spring.elasticsearch.rest.port}")
    private int port;
    @Value("${spring.elasticsearch.rest.username}")
    private String userName;
    @Value("${spring.elasticsearch.rest.password}")
    private String passWord;
    @Value("${spring.elasticsearch.rest.crtName}")
    private String tempCrtName;

    private static String crtName;

    @PostConstruct
    private void init() {
        crtName = tempCrtName;
    }

    /**
     * 解析配置的字符串，转为HttpHost对象数组
     *
     * @return
     */
    private HttpHost toHttpHost() {
        HttpHost httpHost = new HttpHost(host, port, "https");
        return httpHost;
    }

    /**
     * 同步客户端
     * @return
     * @throws Exception
     */
    @Bean
    public ElasticsearchClient clientBySync() throws Exception {
        ElasticsearchTransport transport = getElasticsearchTransport(userName, passWord, toHttpHost());
        return new ElasticsearchClient(transport);
    }

    /**
     * 异步客户端
     * @return
     * @throws Exception
     */
    @Bean
    public ElasticsearchAsyncClient clientByAsync() throws Exception {
        ElasticsearchTransport transport = getElasticsearchTransport(userName, passWord, toHttpHost());
        return new ElasticsearchAsyncClient(transport);
    }

    /**
     * 传输对象
     * @return
     * @throws Exception
     */
    @Bean
    public ElasticsearchTransport getTransport() throws Exception {
        return getElasticsearchTransport(userName, passWord, toHttpHost());
    }

    private static SSLContext buildSSLContext() {
        ClassPathResource resource = new ClassPathResource(crtName);
        SSLContext sslContext = null;
        try {
            CertificateFactory factory = CertificateFactory.getInstance("X.509");
            Certificate trustedCa;
            try (InputStream is = resource.getInputStream()) {
                trustedCa = factory.generateCertificate(is);
            }
            KeyStore trustStore = KeyStore.getInstance("pkcs12");
            trustStore.load(null, null);
            trustStore.setCertificateEntry("ca", trustedCa);
            SSLContextBuilder sslContextBuilder = SSLContexts.custom()
                    .loadTrustMaterial(trustStore, null);
            sslContext = sslContextBuilder.build();
        } catch (CertificateException | IOException | KeyStoreException | NoSuchAlgorithmException |
                KeyManagementException e) {
//            log.error("ES连接认证失败", e);
        }

        return sslContext;
    }

    private static ElasticsearchTransport getElasticsearchTransport(String username, String passwd, HttpHost... hosts) {
        // 账号密码的配置
        final CredentialsProvider credentialsProvider = new BasicCredentialsProvider();
        credentialsProvider.setCredentials(AuthScope.ANY, new UsernamePasswordCredentials(username, passwd));

        // 自签证书的设置，并且还包含了账号密码
        RestClientBuilder.HttpClientConfigCallback callback = httpAsyncClientBuilder -> httpAsyncClientBuilder
                .setSSLContext(buildSSLContext())
                .setSSLHostnameVerifier(NoopHostnameVerifier.INSTANCE)
                .setDefaultCredentialsProvider(credentialsProvider);

        // 用builder创建RestClient对象
        RestClient client = RestClient
                .builder(hosts)
                .setHttpClientConfigCallback(callback)
                .build();
        return new RestClientTransport(client, new JacksonJsonpMapper());
    }

}

5、对index的操作

@RestController
public class ESController {

    @Autowired
    private ElasticsearchClient esClient;

    @Autowired
    private ElasticsearchTransport transport;

    @GetMapping("/init1")
    public void initElastic() throws Exception{
        //获取索引客户端对象
        ElasticsearchIndicesClient indices = esClient.indices();

        //创建索引 采用构建器的方式构建(在创建之前需要先判断该索引是否存在)
        boolean exists = indices.exists(u -> u.index("user")).value();
        if (exists) {
            System.out.println("该索引已存在！！");
        } else {
            CreateIndexResponse createIndexResponse = indices.create(c -> c.index("user"));
        }

        //查询索引
        GetIndexResponse getResponse = indices.get(g -> g.index("user"));
        System.out.println("查询索引："+getResponse);

        //删除索引
        DeleteIndexResponse deleteResponse = indices.delete(d -> d.index("user"));
        System.out.println("删除索引："+deleteResponse.acknowledged());
    }
}

6、文档插入

@RestController
public class ESController {

    @Autowired
    private ElasticsearchClient esClient;

    @Autowired
    private ElasticsearchTransport transport;
    
    @GetMapping("/insert")
    public void insert() {
        
        Car car = new Car();

        try {
            esClient.create(s -> s
                    .index("car")      // 位于哪个索引
                    .id("10000")          // 唯一标识：id
                    .document(car)  // 映射实体
            );
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

7、查询

普通的查询官网文档上都有，这里不再演示

官网链接：https://www.elastic.co/guide/en/elasticsearch/client/java-api-client/current/indexing.html

地理位置的查询：，本人在各个平台没有找到对应的例子，这里重点展示：

@PostMapping("/init2")
    public void init2Elastic() throws Exception {

        // 地理查询
        SearchResponse