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SpringBoot整合Elasticsearch有以下几种方式#xff1a;
使用官方的Elasticsearch Java客户端进行集成 通过添加Elasticsearch Java客户端的依赖#xff0c;可以直接在Spring Boot应用中使用原生的Elasticsearch API进行操作。参考文档 使用Sp…SpringBoot整合Elasticsearch
SpringBoot整合Elasticsearch有以下几种方式
使用官方的Elasticsearch Java客户端进行集成 通过添加Elasticsearch Java客户端的依赖可以直接在Spring Boot应用中使用原生的Elasticsearch API进行操作。参考文档 使用Spring Data Elasticsearch进行集成 Spring Data Elasticsearch是Spring Data项目的一部分提供了更高级的抽象和易用性可以简化与Elasticsearch的交互。通过添加Spring Data Elasticsearch的依赖可以使用Repository接口和注解来定义和执行CRUD操作。官方文档
本文使用第一种方式。使用官方推荐的RestHighLevelClient操作ES。由于版本兼容问题请选择和Elasticsearch对应的Java客户端版本。
依赖 从官方文档可以知道需要导入org.elasticsearch:elasticsearch和org.elasticsearch.client:elasticsearch-rest-client。
dependenciesdependencygroupIdorg.springframework.boot/groupIdartifactIdspring-boot-starter-data-elasticsearch/artifactIdversion2.2.2.RELEASE/version/dependencydependencygroupIdorg.elasticsearch/groupIdartifactIdelasticsearch/artifactIdversion7.4.2/version/dependencydependencygroupIdorg.elasticsearch.client/groupIdartifactIdelasticsearch-rest-high-level-client/artifactIdversion7.4.2/version/dependencydependencygroupIdorg.springframework.boot/groupIdartifactIdspring-boot-starter-test/artifactIdscopetest/scope/dependency/dependencies配置
Configuration
public class ESConfig {/*** 解决netty引起的issue*/PostConstructvoid init() {System.setProperty(es.set.netty.runtime.available.processors, false);}Beanpublic RestHighLevelClient getRestClient() {RestHighLevelClient restHighLevelClient new RestHighLevelClient(RestClient.builder(new HttpHost(192.168.200.200, 9200, http)));return restHighLevelClient;}}测试
创建索引 Autowiredprivate RestHighLevelClient restHighLevelClient;/*** 创建索引*/Testpublic void createIndex1() {String result 创建成功;CreateIndexRequest createIndexRequest new CreateIndexRequest(stu);try {CreateIndexResponse createIndexResponse restHighLevelClient.indices().create(createIndexRequest, RequestOptions.DEFAULT);if (!createIndexResponse.isAcknowledged()){result 创建失败;}else{result 索引已经存在;}} catch (IOException e) {e.printStackTrace();result 接口异常;}System.out.println(result);}/*** 创建索引同时创建映射关系* 如索引存在新增文档数据如果索引不存在创建一条索引*/Testpublic void createIndex2() {HashMapString, Object map new HashMap();map.put(user, kimchyrw);map.put(postDate, new Date());map.put(message, trying out Elasticsearch);IndexRequest request new IndexRequest(posts).id(2).source(map, XContentType.JSON);try {//响应信息IndexResponse indexResponse restHighLevelClient.index(request, RequestOptions.DEFAULT);String index indexResponse.getIndex();String id indexResponse.getId();System.out.println(index: index id: id);//创建索引还是更新索引if (indexResponse.getResult() DocWriteResponse.Result.CREATED) {System.out.println(CREATED.....);} else if (indexResponse.getResult() DocWriteResponse.Result.UPDATED) {System.out.println(UPDATED....);}//校验分片信息ReplicationResponse.ShardInfo shardInfo indexResponse.getShardInfo();if (shardInfo.getTotal() ! shardInfo.getSuccessful()){}if (shardInfo.getFailed() 0) {for (ReplicationResponse.ShardInfo.Failure failure :shardInfo.getFailures()) {String reason failure.reason();System.out.println(reason: reason);}}} catch (IOException e) {e.printStackTrace();}}更新文档中的数据 /*** 更新一行数据*/Testpublic void updateDoc() {//更新的数据HashMapString, Object map new HashMap();map.put(updated, new Date());map.put(user, kimchyrw);map.put(reason, daily update);UpdateRequest updateRequest new UpdateRequest(posts, 2).doc(map);try {UpdateResponse updateResponse restHighLevelClient.update(updateRequest, RequestOptions.DEFAULT);String index updateResponse.getIndex();String id updateResponse.getId();long version updateResponse.getVersion();if (updateResponse.getResult() DocWriteResponse.Result.CREATED) {System.out.println(CREATED);} else if (updateResponse.getResult() DocWriteResponse.Result.UPDATED) {System.out.println(UPDATED);} else if (updateResponse.getResult() DocWriteResponse.Result.DELETED) {System.out.println(DELETED);} else if (updateResponse.getResult() DocWriteResponse.Result.NOOP) {System.out.println(NOOP);}} catch (IOException e) {e.printStackTrace();}}查询 /*** 根据id查询document*/Testpublic void getApi() {GetRequest getRequest new GetRequest(posts, 1);//可选参数//禁用源检索默认启用,开启后检索不到数据// getRequest.fetchSourceContext(FetchSourceContext.DO_NOT_FETCH_SOURCE);try {GetResponse getResponse restHighLevelClient.get(getRequest, RequestOptions.DEFAULT);String index getResponse.getIndex();String id getResponse.getId();System.out.println(index: index id: id);if (getResponse.isExists()) {long version getResponse.getVersion();String sourceAsString getResponse.getSourceAsString();MapString, Object sourceAsMap getResponse.getSourceAsMap();byte[] sourceAsBytes getResponse.getSourceAsBytes();System.out.println(version: version);System.out.println(sourceAsMap: sourceAsMap);System.out.println(sourceAsBytes: Arrays.toString(sourceAsBytes));System.out.println(sourceAsString: sourceAsString);}} catch (IOException e) {e.printStackTrace();}}/*** 根据指定字段查询document*/Testpublic void testSearch2() {SearchRequest searchRequest new SearchRequest(posts);SearchSourceBuilder searchSourceBuilder new SearchSourceBuilder();//根据指定字段查询searchSourceBuilder.query(QueryBuilders.termQuery(user, kimchy));//分页查询记录searchSourceBuilder.from(0);searchSourceBuilder.size(5);//设置超时时间// searchSourceBuilder.timeout(new TimeValue(60, TimeUnit.SECONDS));//按字段排序或者按评分排序searchSourceBuilder.sort(new ScoreSortBuilder().order(SortOrder.DESC));searchSourceBuilder.sort(new FieldSortBuilder(_id).order(SortOrder.ASC));//结果高亮//查询部分字段searchSourceBuilder.fetchSource(new String[]{user}, new String[]{user1});searchRequest.source(searchSourceBuilder);try {SearchResponse searchResponse restHighLevelClient.search(searchRequest, RequestOptions.DEFAULT);RestStatus status searchResponse.status();TimeValue took searchResponse.getTook();Boolean terminatedEarly searchResponse.isTerminatedEarly();boolean timedOut searchResponse.isTimedOut();SearchHits hits searchResponse.getHits();TotalHits totalHits hits.getTotalHits();long numHits totalHits.value;TotalHits.Relation relation totalHits.relation;float maxScore hits.getMaxScore();System.out.println(hits: hits totalHits: totalHits numHits: numHits maxScore: maxScore);SearchHit[] searchHits hits.getHits();for (SearchHit hit: searchHits) {String id hit.getId();System.out.println(id: id);String sourceAsString hit.getSourceAsString();System.out.println(sourceAsString);}} catch (IOException e) {e.printStackTrace();}}参考
Rest High Level Client文档Spring Data Elasticsearch - Reference Documentation
