版本

SpringBoot == 3.0

Elasticsearch == 8.12.1

依赖

我使用的

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

还可以用，但我没用的。1，2一起用会报下面第一个错

<dependency><groupId>co.elastic.clients</groupId><artifactId>elasticsearch-java</artifactId><version>8.12.1</version>
</dependency>

注意：elasticsearch7.17版本之前使用的是，现在已经被弃用

<dependency><groupId>org.elasticsearch.client</groupId><artifactId>elasticsearch-rest-high-level-client</artifactId><version>7.17.18</version>
</dependency>

资料

之前看的elasticsearch7.17之前如何做的：链接

elasticsearch7.17以上的代码示例：链接

官方文档：链接

一个介绍：链接

报错

 错误1：Correct the classpath of your application so that it contains compatible versions of the classes org

我的解决方法就是只用第一个依赖

错误2：Error deserializing co.elastic.clients.elasticsearch.core.search.Hit: jakarta.json.JsonException: Ja 

解决方法

其他 

贴一个，elasticsearch7.17之前的配置，但最好还是用最新的方法

@Data
@Configuration
@ConfigurationProperties(prefix = "es")
public class ESConfig {private String esUrl;private String esUsername;private String esPassword;@Beanpublic RestHighLevelClient configRestHighLevelClient() throws Exception {String[] esUrlArr = esUrl.split(",");List<HttpHost> httpHosts = new ArrayList<>();for(String es : esUrlArr){String[] esUrlPort = es.split(":");httpHosts.add(new HttpHost(esUrlPort[0], Integer.parseInt(esUrlPort[1]), "http"));}final CredentialsProvider credentialsProvider = new BasicCredentialsProvider();credentialsProvider.setCredentials(AuthScope.ANY,new UsernamePasswordCredentials(esUsername, esPassword));RestClientBuilder builder = RestClient.builder(httpHosts.toArray(new HttpHost[0])).setHttpClientConfigCallback(httpClientBuilder -> httpClientBuilder.setDefaultCredentialsProvider(credentialsProvider));System.out.println("ES配置完成");return new RestHighLevelClient(builder);}
}

@org.junit.Testpublic void getDocument() throws Exception {try (RestHighLevelClient client = new ESConfig().configRestHighLevelClient()) {// 指定要搜索的索引名称String indexName = "cartoon_reply_info";// 创建搜索请求对象SearchRequest searchRequest = new SearchRequest(indexName);// 创建搜索请求的查询条件SearchSourceBuilder searchSourceBuilder = new SearchSourceBuilder();searchSourceBuilder.query(QueryBuilders.matchQuery("content", "世界"));searchSourceBuilder.query(QueryBuilders.matchAllQuery()); // 匹配所有文档searchSourceBuilder.size(10); // 设置返回结果的数量searchSourceBuilder.sort("mediaId", SortOrder.DESC); // 根据字段排序searchSourceBuilder.highlighter(new HighlightBuilder().field("世界")); // 设置高亮字段searchSourceBuilder.size(10);// 将查询条件添加到搜索请求中searchRequest.source(searchSourceBuilder);// 执行搜索请求SearchResponse searchResponse = client.search(searchRequest, RequestOptions.DEFAULT);// 处理搜索结果// 您可以从 searchResponse 中获取搜索结果并进行进一步的处理// 示例中省略了处理过程for (SearchHit hit : searchResponse.getHits().getHits()) {System.out.println(hit.getSourceAsString()); // 输出文档内容}} catch (IOException e) {e.printStackTrace();}}