Springboot如何整合elasticsearch

Springboot可以通过官方提供的Elasticsearch Starter来整合elasticsearch，它可以自动配置Elasticsearch客户端和提供Elasticsearch操作的工具。

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Springboot整合ElasticSearch

好的，下面是Spring Boot整合Elasticsearch的基本步骤：

1. 添加Elasticsearch依赖

在pom.xml文件中添加Elasticsearch的依赖：

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-data-elasticsearch</artifactId>
</dependency>

2. 配置Elasticsearch连接信息

在application.properties或application.yml文件中添加Elasticsearch的连接信息：

spring.data.elasticsearch.cluster-nodes=localhost:9300
spring.data.elasticsearch.cluster-name=my-application

3. 创建Elasticsearch实体类

创建一个实体类，用于映射Elasticsearch中的文档：

@Document(indexName = "blog", type = "article")
public class Article {
    @Id
    private String id;

    private String title;

    private String content;

    // 省略getter和setter方法
}

4. 创建Elasticsearch的Repository

创建一个继承自ElasticsearchRepository的接口，用于操作Elasticsearch中的文档：

public interface ArticleRepository extends ElasticsearchRepository<Article, String> {
    List<Article> findByTitle(String title);
}

5. 使用ElasticsearchRepository进行操作

在Spring Boot的Controller中，注入ArticleRepository，并使用它进行Elasticsearch的操作：

@RestController
public class ArticleController {
    @Autowired
    private ArticleRepository articleRepository;

    @GetMapping("/articles")
    public List<Article> search(@RequestParam("title") String title) {
        return articleRepository.findByTitle(title);
    }
}

以上就是基本的Spring Boot整合Elasticsearch的步骤。当然，还有很多高级的用法，比如分页、聚合等，需要根据具体的业务需求进行实现。

springboot整合elasticSearch

Spring Boot可以很方便地与Elasticsearch进行集成。下面是一个简单的示例：

1. 添加Elasticsearch客户端依赖

在pom.xml中添加以下依赖：

<dependency>
    <groupId>org.elasticsearch.client</groupId>
    <artifactId>elasticsearch-rest-high-level-client</artifactId>
    <version>7.12.0</version>
</dependency>

2. 配置Elasticsearch客户端

在application.properties中添加以下配置：

spring.elasticsearch.rest.uris=http://localhost:9200

3. 创建Elasticsearch客户端Bean

@Configuration
public class ElasticsearchConfig {

    @Value("${spring.elasticsearch.rest.uris}")
    private String elasticsearchUrls;

    @Bean
    public RestHighLevelClient restHighLevelClient() {
        String[] urls = elasticsearchUrls.split(",");
        HttpHost[] httpHosts = new HttpHost[urls.length];
        for (int i = 0; i < urls.length; i++) {
            String url = urls[i];
            httpHosts[i] = new HttpHost(url.split(":")[0], Integer.parseInt(url.split(":")[1]), "http");
        }
        RestClientBuilder builder = RestClient.builder(httpHosts);
        return new RestHighLevelClient(builder);
    }
}

4. 创建Elasticsearch操作类

@Component
public class ElasticsearchTemplate {

    @Autowired
    private RestHighLevelClient restHighLevelClient;

    public void index(String index, String id, String json) throws IOException {
        IndexRequest request = new IndexRequest(index);
        request.id(id);
        request.source(json, XContentType.JSON);
        restHighLevelClient.index(request, RequestOptions.DEFAULT);
    }

    public SearchHits search(String index, String keyword) throws IOException {
        SearchRequest request = new SearchRequest(index);
        SearchSourceBuilder builder = new SearchSourceBuilder();
        builder.query(QueryBuilders.matchQuery("name", keyword));
        request.source(builder);
        SearchResponse response = restHighLevelClient.search(request, RequestOptions.DEFAULT);
        return response.getHits();
    }
}

5. 使用Elasticsearch操作类

@RestController
public class ElasticsearchController {

    @Autowired
    private ElasticsearchTemplate elasticsearchTemplate;

    @PostMapping("/index")
    public void index(String index, String id, String json) throws IOException {
        elasticsearchTemplate.index(index, id, json);
    }

    @GetMapping("/search")
    public SearchHits search(String index, String keyword) throws IOException {
        return elasticsearchTemplate.search(index, keyword);
    }
}

这就是一个简单的Spring Boot整合Elasticsearch的示例。你可以根据自己的需求进行修改和扩展。