SpringBoot3整合Elasticsearch8.x之全面保姆級(jí)教程

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整合ES

環(huán)境準(zhǔn)備

安裝配置ES：https://blog.csdn.net/qq_50864152/article/details/136724528
安裝配置Kibana：https://blog.csdn.net/qq_50864152/article/details/136727707
新建項(xiàng)目：新建名為web的SpringBoot3項(xiàng)目

elasticsearch-java

公共配置

介紹：一個(gè)開(kāi)源的高擴(kuò)展的分布式全文檢索引擎，可以近乎實(shí)時(shí)的存儲(chǔ) 和檢索數(shù)據(jù)
依賴(lài)：web模塊引入elasticsearch-java依賴(lài)---但其版本必須與你下載的ES的版本一致

<!-- 若不存在Spring Data ES的某個(gè)版本支持你下的ES版本,則使用  -->
<!-- ES 官方提供的在JAVA環(huán)境使用的依賴(lài) -->
<dependency>
  <groupId>co.elastic.clients</groupId>
  <artifactId>elasticsearch-java</artifactId>
  <version>8.11.1</version>
</dependency>

<!-- 和第一個(gè)依賴(lài)是一起的,為了解決springboot項(xiàng)目的兼容性問(wèn)題  -->
<dependency>
  <groupId>com.fasterxml.jackson.core</groupId>
  <artifactId>jackson-databind</artifactId>
</dependency>

配置：web模塊dev目錄application-dal添加

使用open＋@Value("${elasticsearch.open}")的方式不能放到Nacos配置中心

# elasticsearch配置
elasticsearch:
  # 自定義屬性---設(shè)置是否開(kāi)啟ES,false表不開(kāi)竅ES
  open: true
  # es集群名稱(chēng),如果下載es設(shè)置了集群名稱(chēng),則使用配置的集群名稱(chēng)
  clusterName: es
  hosts: 127.0.0.1:9200
  # es 請(qǐng)求方式
  scheme: http
  # es 連接超時(shí)時(shí)間
  connectTimeOut: 1000
  # es socket 連接超時(shí)時(shí)間
  socketTimeOut: 30000
  # es 請(qǐng)求超時(shí)時(shí)間
  connectionRequestTimeOut: 500
  # es 最大連接數(shù)
  maxConnectNum: 100
  # es 每個(gè)路由的最大連接數(shù)
  maxConnectNumPerRoute: 100

配置：web模塊config包下新建ElasticSearchConfig類(lèi)

package cn.bytewisehub.pai.web.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.Data;
import lombok.extern.slf4j.Slf4j;
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.impl.client.BasicCredentialsProvider;
import org.elasticsearch.client.RestClient;
import org.elasticsearch.client.RestClientBuilder;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

@Slf4j
@Data
@Configuration
@ConfigurationProperties(prefix = "elasticsearch")
public class ElasticSearchConfig {

    // 是否開(kāi)啟ES
    private Boolean open;

    // es 集群host ip 地址
    private String hosts;

    // es用戶(hù)名
    private String userName;

    // es密碼
    private String password;

    // es 請(qǐng)求方式
    private String scheme;

    // es集群名稱(chēng)
    private String clusterName;

    // es 連接超時(shí)時(shí)間
    private int connectTimeOut;

    // es socket 連接超時(shí)時(shí)間
    private int socketTimeOut;

    // es 請(qǐng)求超時(shí)時(shí)間
    private int connectionRequestTimeOut;

    // es 最大連接數(shù)
    private int maxConnectNum;

    // es 每個(gè)路由的最大連接數(shù)
    private int maxConnectNumPerRoute;

    // es api key
    private String apiKey;


    public RestClientBuilder creatBaseConfBuilder(String scheme){


        // 1. 單節(jié)點(diǎn)ES Host獲取
        String host = hosts.split(":")[0];
        String port = hosts.split(":")[1];
        // The value of the schemes attribute used by noSafeRestClient() is http
        // but The value of the schemes attribute used by safeRestClient() is https
        HttpHost httpHost = new HttpHost(host, Integer.parseInt(port),scheme);

        // 2. 創(chuàng)建構(gòu)建器對(duì)象
        //RestClientBuilder: ES客戶(hù)端庫(kù)的構(gòu)建器接口,用于構(gòu)建RestClient實(shí)例;允許你配置與Elasticsearch集群的連接,設(shè)置請(qǐng)求超時(shí),設(shè)置身份驗(yàn)證,配置代理等
        RestClientBuilder builder = RestClient.builder(httpHost);

        // 連接延時(shí)配置
        builder.setRequestConfigCallback(requestConfigBuilder -> {
            requestConfigBuilder.setConnectTimeout(connectTimeOut);
            requestConfigBuilder.setSocketTimeout(socketTimeOut);
            requestConfigBuilder.setConnectionRequestTimeout(connectionRequestTimeOut);
            return requestConfigBuilder;
        });

        // 3. HttpClient 連接數(shù)配置
        builder.setHttpClientConfigCallback(httpClientBuilder -> {
            httpClientBuilder.setMaxConnTotal(maxConnectNum);
            httpClientBuilder.setMaxConnPerRoute(maxConnectNumPerRoute);
            return httpClientBuilder;
        });

        return builder;
    }
}

測(cè)試：web模塊test目錄下新建ElasticSearchTest類(lèi)

@Slf4j
@SpringBootTest
public class ElasticSearchTest {

    @Value("${elasticsearch.open}")
    // 是否開(kāi)啟ES,默認(rèn)開(kāi)啟
    String open = "true";
}

直接連接`ES`

設(shè)置：ES Elasticsearch.yml的xpack.security.enabled屬性設(shè)置為false

xpack.security.enabled：
● 默認(rèn)true：必須使用賬號(hào)連接ES
● 若為false：必須使用http://localhost:9200/訪問(wèn)ES服務(wù)+啟動(dòng)Kibana服務(wù)會(huì)失敗+不需要使用賬號(hào)連接，但必須使用HTTP連接

添加：ElasticSearchConfig類(lèi)添加下列方法

/**
* @function: 創(chuàng)建使用http連接來(lái)直接連接ES服務(wù)器的客戶(hù)端
* 如果@Bean沒(méi)有指定bean的名稱(chēng),那么這個(gè)bean的名稱(chēng)就是方法名
*/
@Bean(name = "directConnectionESClient")
public ElasticsearchClient directConnectionESClient(){

    RestClientBuilder builder = creatBaseConfBuilder((scheme == "http")?"http":"http");
    
    //Create the transport with a Jackson mapper
    ElasticsearchTransport transport = new RestClientTransport(builder.build(), new JacksonJsonpMapper());

    //And create the API client
    ElasticsearchClient esClient = new ElasticsearchClient(transport);

    return esClient;
};

添加：ElasticSearchTest類(lèi)中添加下列代碼---索引名必須小寫(xiě)
運(yùn)行：設(shè)置跳過(guò)測(cè)試--->手動(dòng)運(yùn)行/不跳過(guò)--->直接install，但不運(yùn)行測(cè)試

@Resource(name = "directConnectionESClient")
ElasticsearchClient directConnectionESClient;


@Test
public void directConnectionTest() throws IOException {

if (open.equals("true")) {
    //創(chuàng)建索引
    CreateIndexResponse response = directConnectionESClient.indices().create(c -> c.index("direct_connection_index"));
    log.info(response.toString());
}
else{
    log.info("es is closed");
}
}

賬號(hào)密碼連接`ES`

設(shè)置：ES Elasticsearch.yml的xpack.security.enabled屬性使用默認(rèn)值+ xpack.security.http.ssl.enabled設(shè)置為false

注意：若xpack.security.enabled屬性為false，則xpack.security.http.ssl.enabled屬性不生效，即相當(dāng)于設(shè)置為false；所有以xpack開(kāi)頭的屬性都不會(huì)生效

ES Elasticsearch.yml的xpack.security.http.ssl.enabled：
● 默認(rèn)true：必須使用https://localhost:9200/訪問(wèn)ES服務(wù)+啟動(dòng)Kibana服務(wù)會(huì)成功+需要使用賬號(hào)連接+必須使用HTTPS連接
● 若為false：必須使用http://localhost:9200/訪問(wèn)ES服務(wù)+啟動(dòng)Kibana服務(wù)會(huì)失敗+需要使用賬號(hào)連接，但必須使用HTTP連接

配置：dev目錄application-dal中添加下列配置

# elasticsearch配置
elasticsearch:
  userName:  #自己的賬號(hào)名
  password:  #自己的密碼

添加：ElasticSearchTest類(lèi)中添加下列代碼---索引名必須小寫(xiě)+不能有空格
運(yùn)行：設(shè)置跳過(guò)測(cè)試--->手動(dòng)運(yùn)行/不跳過(guò)--->直接install，但不運(yùn)行測(cè)試

@Resource(name = "accountConnectionESClient")
ElasticsearchClient accountConnectionESClient;


@Test
public void accountConnectionTest() throws IOException {

if (open.equals("true")) {
    //創(chuàng)建索引
    CreateIndexResponse response = accountConnectionESClient.indices().create(c -> c.index("account_connection_index"));
    log.info(response.toString());
}
else{
    log.info("es is closed");
}
}

證書(shū)賬號(hào)連接`ES`

設(shè)置：ES Elasticsearch.yml的xpack.security.enabled和xpack.security.http.ssl.enabled配置項(xiàng)使用默認(rèn)值

設(shè)置為true后，ES就走https，若scheme為http，則報(bào)Unrecognized SSL message錯(cuò)誤

配置：將dev目錄application-dal中elasticsearch.scheme配置項(xiàng)改成https
證書(shū)添加：終端輸入keytool -importcert -alias es_https_ca -keystore "D:\computelTool\Java\JDK\JDK21\lib\security\cacerts" -file "D:\computelTool\database\elasticsearch8111\config\certs\http_ca.crt"

keytool -delete -alias es_https_ca -keystore "D:\computelTool\Java\JDK\JDK21\lib\security\cacerts" ---與上面的命令相反

拷貝：將ESconfig目錄下certs目錄下的http_ca.crt文件拷貝到web模塊resource目錄
添加：ElasticSearchConfig類(lèi)添加下列方法

/**
* @function: 創(chuàng)建用于安全連接(證書(shū) + 賬號(hào))ES服務(wù)器的客戶(hù)端
* 如果@Bean沒(méi)有指定bean的名稱(chēng),那么這個(gè)bean的名稱(chēng)就是方法名
*/
@Bean(name = "accountAndCertificateConnectionESClient")
public ElasticsearchClient accountAndCertificateConnectionESClient() {


    RestClientBuilder builder = creatBaseConfBuilder( (scheme == "https")?"https":"https");

    // 1.賬號(hào)密碼的配置
    //CredentialsProvider: 用于提供 HTTP 身份驗(yàn)證憑據(jù)的接口; 允許你配置用戶(hù)名和密碼,以便在與服務(wù)器建立連接時(shí)進(jìn)行身份驗(yàn)證
    CredentialsProvider credentialsProvider = new BasicCredentialsProvider();
    credentialsProvider.setCredentials(AuthScope.ANY, new UsernamePasswordCredentials(userName, password));

    // 2.設(shè)置自簽證書(shū),并且還包含了賬號(hào)密碼
    builder.setHttpClientConfigCallback(httpAsyncClientBuilder -> httpAsyncClientBuilder
                                        .setSSLContext(buildSSLContext())
                                        .setSSLHostnameVerifier(NoopHostnameVerifier.INSTANCE)
                                        .setDefaultCredentialsProvider(credentialsProvider));

    RestClientTransport transport = new RestClientTransport(builder.build(), new JacksonJsonpMapper());

    //And create the API client
    ElasticsearchClient esClient = new ElasticsearchClient(transport);

    return esClient;
}

private static SSLContext buildSSLContext() {

    // 讀取http_ca.crt證書(shū)
    ClassPathResource resource = new ClassPathResource("http_ca.crt");
    SSLContext sslContext = null;
    try {
        // 證書(shū)工廠
        CertificateFactory factory = CertificateFactory.getInstance("X.509");
        Certificate trustedCa;
        try (InputStream is = resource.getInputStream()) {
            trustedCa = factory.generateCertificate(is);
        }
        // 密鑰庫(kù)
        KeyStore trustStore = KeyStore.getInstance("pkcs12");
        trustStore.load(null, "liuxiansheng".toCharArray());
        trustStore.setCertificateEntry("ca", trustedCa);
        SSLContextBuilder sslContextBuilder = SSLContexts.custom()
                 .loadTrustMaterial(trustStore, null);
        sslContext = sslContextBuilder.build();
    } catch (CertificateException | IOException | KeyStoreException | NoSuchAlgorithmException |
                 KeyManagementException e) {
        log.error("ES連接認(rèn)證失敗", e);
    }
    return sslContext;
}

測(cè)試：ElasticSearchTest類(lèi)添加

@Resource(name = "accountAndCertificateConnectionESClient")
ElasticsearchClient accountAndCertificateConnectionESClient;

@Test
public void  accountAndCertificateConnectionTest() throws IOException {

if (open.equals("true")) {
    //創(chuàng)建索引
    CreateIndexResponse response =  accountAndCertificateConnectionESClient.indices().create(c -> c.index("account_and_certificate_connection_index"));
    log.info(response.toString());
    System.out.println(response.toString());
}
else{
    log.info("es is closed");
}
}

Spring Data ES

公共配置

依賴(lài)：web模塊引入該依賴(lài)---但其版本必須與你下載的ES的版本一致

版本：點(diǎn)擊https://spring.io/projects/spring-data-elasticsearch#learn，點(diǎn)擊GA版本的Reference Doc，點(diǎn)擊version查看Spring Data ES與ES版本的支持關(guān)系

參考：https://www.yuque.com/itwanger/vn4p17/wslq2t/https://blog.csdn.net/qq_40885085/article/details/105023026

<!-- 若存在Spring Data ES的某個(gè)版本支持你下的ES版本,則使用  -->
<!-- Spring官方在ES官方提供的JAVA環(huán)境使用的依賴(lài)的基礎(chǔ)上做了封裝 -->
<dependency>
  <groupId>org.springframework.boot</groupId>
  <artifactId>spring-boot-starter-data-elasticsearch</artifactId>
</dependency>

<!-- ESTestEntity用到 -->
<dependency>
	<groupId>jakarta.servlet</groupId>
	<artifactId>jakarta.servlet-api</artifactId>
	<version>6.0.0</version>
	<scope>provided</scope>
</dependency>

<!-- ESTestEntity用到 -->
<dependency>
  <groupId>org.projectlombok</groupId>
  <artifactId>lombok</artifactId>
  <scope>provided</scope>
  <!--provided：指定該依賴(lài)項(xiàng)在編譯時(shí)是必需的，才會(huì)生效, 但在運(yùn)行時(shí)不需要,也不會(huì)生效-->
  <!--這樣 Lombok 會(huì)在編譯期靜悄悄地將帶 Lombok 注解的源碼文件正確編譯為完整的 class 文件 -->
</dependency>

新建：web模塊TestEntity目錄新建ESTestEntity

@Data
@EqualsAndHashCode(callSuper = false)
@Document(indexName = "test")
public class ESTestEntity implements Serializable {

    private static final long serialVersionUID = 1L;

    @Id
    private Long id;

    @Field(type = FieldType.Text, analyzer = "ik_max_word")
    private String content;

    private String title;

    private String excerpt;
}

新建：web模塊TestRepository包下新建ESTestRepository 接口

import cn.bytewisehub.pai.web.TestEntity.ESTestEntity;
import org.springframework.data.domain.Page;
import org.springframework.data.domain.Pageable;
import org.springframework.data.elasticsearch.repository.ElasticsearchRepository;

public interface ESTestRepository extends ElasticsearchRepository<ESTestEntity, Long> {
}

直接連接`ES`

配置：ES Elasticsearch.yml的xpack.security.enabled屬性設(shè)置為false

xpack.security.enabled：
● 默認(rèn)true：必須使用賬號(hào)連接ES
● 若為false：必須使用http://localhost:9200/訪問(wèn)ES服務(wù)+啟動(dòng)Kibana服務(wù)會(huì)失敗+不需要使用賬號(hào)連接，但必須使用HTTP連接

配置：web模塊dev目錄application-dal添加

spring:
  elasticsearch:
    uris:
      - http://127.0.0.1:9200

新建：web模塊test目錄新建ElasticsearchTemplateTest

import cn.bytewisehub.pai.web.TestEntity.ESTestEntity;
import cn.bytewisehub.pai.web.TestRepository.ESTestRepository;
import org.junit.jupiter.api.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.data.elasticsearch.client.elc.ElasticsearchTemplate;

@SpringBootTest
public class ElasticsearchTemplateTest {

    @Autowired
    ESTestRepository esTestRepository;

    @Autowired
    ElasticsearchTemplate elasticsearchTemplate;

    @Test
    void save() {
        ESTestEntity esTestEntity = new ESTestEntity();
        esTestEntity.setId(1L);
        esTestEntity.setContent("不安全連接");
        esTestEntity.setTitle("world");
        esTestEntity.setExcerpt("test");
        System.out.println(elasticsearchTemplate.save(esTestEntity));
    }

    @Test
    void insert() {
        ESTestEntity esTestEntity = new ESTestEntity();
        esTestEntity.setId(2L);
        esTestEntity.setContent("不安全連接");
        esTestEntity.setTitle("world");
        esTestEntity.setExcerpt("test");
        System.out.println(esTestRepository.save(esTestEntity));
    }
}

訪問(wèn)：點(diǎn)擊http://localhost:9200/test/_search ---查詢(xún)索引庫(kù)test

`HTTP`連接`ES`

配置：ES Elasticsearch.yml的xpack.security.enabled屬性使用默認(rèn)值+ xpack.security.http.ssl.enabled設(shè)置為false

ES Elasticsearch.yml的xpack.security.http.ssl.enabled：
● 默認(rèn)true：必須使用https://localhost:9200/訪問(wèn)ES服務(wù)+啟動(dòng)Kibana服務(wù)會(huì)成功+需要使用賬號(hào)連接+必須使用HTTPS連接
● 若為false：必須使用http://localhost:9200/訪問(wèn)ES服務(wù)+啟動(dòng)Kibana服務(wù)會(huì)失敗+需要使用賬號(hào)連接，但必須使用HTTP連接文章來(lái)源地址http://www.zghlxwxcb.cn/news/detail-850077.html

配置：web模塊dev目錄application-dal添加

spring:
  elasticsearch:
    uris:
      - http://127.0.0.1:9200
    username:  # 賬號(hào)用戶(hù)名
    password:  #賬號(hào)密碼

修改：web模塊test目錄下ElasticsearchTemplateTest修改成這樣，其他參見(jiàn)直接連接

import cn.bytewisehub.pai.web.TestEntity.ESTestEntity;
import cn.bytewisehub.pai.web.TestRepository.ESTestRepository;
import org.junit.jupiter.api.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.data.elasticsearch.client.elc.ElasticsearchTemplate;

@SpringBootTest
public class ElasticsearchTemplateTest {

    @Autowired
    ESTestRepository esTestRepository;

    @Autowired
    ElasticsearchTemplate elasticsearchTemplate;

    @Test
    void save() {
        ESTestEntity esTestEntity = new ESTestEntity();
        esTestEntity.setId(1L);
        esTestEntity.setContent("不安全連接");
        esTestEntity.setTitle("world");
        esTestEntity.setExcerpt("test");
        System.out.println(elasticsearchTemplate.save(esTestEntity));
    }

    @Test
    void insert() {
        ESTestEntity esTestEntity = new ESTestEntity();
        esTestEntity.setId(2L);
        esTestEntity.setContent("不安全連接");
        esTestEntity.setTitle("world");
        esTestEntity.setExcerpt("test");
        System.out.println(esTestRepository.save(esTestEntity));
    }
}

訪問(wèn)：點(diǎn)擊http://localhost:9200/test/_search ---查詢(xún)索引庫(kù)test

`HTTPS`連接`ES`

配置：ES Elasticsearch.yml的xpack.security.enabled和xpack.security.http.ssl.enabled屬性使用默認(rèn)值
配置：web模塊dev目錄application-dal添加

spring:
  elasticsearch:
    uris:
      - https://127.0.0.1:9200
    username:  # 賬號(hào)用戶(hù)名
    password:  #賬號(hào)密碼

修改：web模塊test目錄下ElasticsearchTemplateTest修改成這樣，其他參見(jiàn)直接連接

import cn.bytewisehub.pai.web.TestEntity.ESTestEntity;
import cn.bytewisehub.pai.web.TestRepository.ESTestRepository;
import org.junit.jupiter.api.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.data.elasticsearch.client.elc.ElasticsearchTemplate;

@SpringBootTest
public class ElasticsearchTemplateTest {

    @Autowired
    ESTestRepository esTestRepository;

    @Autowired
    ElasticsearchTemplate elasticsearchTemplate;

    @Test
    void save() {
        ESTestEntity esTestEntity = new ESTestEntity();
        esTestEntity.setId(1L);
        esTestEntity.setContent("不安全連接");
        esTestEntity.setTitle("world");
        esTestEntity.setExcerpt("test");
        System.out.println(elasticsearchTemplate.save(esTestEntity));
    }

    @Test
    void insert() {
        ESTestEntity esTestEntity = new ESTestEntity();
        esTestEntity.setId(2L);
        esTestEntity.setContent("不安全連接");
        esTestEntity.setTitle("world");
        esTestEntity.setExcerpt("test");
        System.out.println(esTestRepository.save(esTestEntity));
    }
}

訪問(wèn)：點(diǎn)擊http://localhost:9200/test/_search ---查詢(xún)索引庫(kù)test

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SpringBoot3整合Elasticsearch8.x之全面保姆級(jí)教程

整合ES

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elasticsearch-java

公共配置

直接連接`ES`

賬號(hào)密碼連接`ES`

證書(shū)賬號(hào)連接`ES`

Spring Data ES

公共配置

直接連接`ES`

`HTTP`連接`ES`

`HTTPS`連接`ES`

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SpringBoot3整合Elasticsearch8.x之全面保姆級(jí)教程

整合ES

環(huán)境準(zhǔn)備

elasticsearch-java

公共配置

直接連接ES

賬號(hào)密碼連接ES

證書(shū)賬號(hào)連接ES

Spring Data ES

公共配置

直接連接ES

HTTP連接ES

HTTPS連接ES

相關(guān)文章

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直接連接`ES`

賬號(hào)密碼連接`ES`

證書(shū)賬號(hào)連接`ES`

直接連接`ES`

`HTTP`連接`ES`

`HTTPS`連接`ES`

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