前陣子和張三豐聊天提到了es。這次正好有機會學習并使用

首先引入依賴

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

配置文件

spring.data.elasticsearch.local=true spring.data.elasticsearch.repositories.enabled=true spring.data.elasticsearch.cluster-name=yourname spring.data.elasticsearch.cluster-nodes=127.0.0.1:9300

然后 創建接口并繼承ElasticsearchRepository

idea 類繼承 ElasticsearchRepository

package com.school.service;import com.school.model.Idea; import org.springframework.data.elasticsearch.repository.ElasticsearchRepository; import org.springframework.stereotype.Component;@Component public interface IdeaRepository extends ElasticsearchRepository<Idea, Long> { }

下一步在需要使用的service 或 Controller中 引用

@Autowiredprivate IdeaRepository ideaRepository; //esjap類@Autowiredprivate ElasticsearchTemplate elasticsearchTemplate; //es工具

使用save方法把數據保存到es中
業務代碼忽略... 保存就完事了

public void save(Long ideaId) {// 插入數據到es中Idea idea = this.selectById(ideaId);idea.setId(ideaId);ideaRepository.save(idea);}

全文檢索并高亮數據

這里注意分頁的頁數是從0開始... 搞得我以為沒查到數據debug了很久

import org.elasticsearch.action.search.SearchResponse; import org.elasticsearch.search.SearchHit; import org.elasticsearch.search.fetch.subphase.highlight.HighlightBuilder; import org.elasticsearch.search.fetch.subphase.highlight.HighlightField; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.data.domain.PageRequest; import org.springframework.data.domain.Pageable; import org.springframework.data.elasticsearch.core.ElasticsearchTemplate; import org.springframework.data.elasticsearch.core.SearchResultMapper; import org.springframework.data.elasticsearch.core.aggregation.AggregatedPage; import org.springframework.data.elasticsearch.core.aggregation.impl.AggregatedPageImpl; import org.springframework.data.elasticsearch.core.query.NativeSearchQueryBuilder; import org.springframework.data.elasticsearch.core.query.SearchQuery;@Autowiredprivate IdeaRepository ideaRepository; //esjap類@Autowiredprivate ElasticsearchTemplate elasticsearchTemplate; //es工具/*** 從es檢索數據** @param content 搜索關鍵字* @param pageNum 頁* @param pageSzie 條* @return*/ public AggregatedPage<Idea> getIdeaListBySrt(String content, Integer pageNum, Integer pageSzie) {Pageable pageable = PageRequest.of(pageNum, pageSzie);String preTag = "<font color='#dd4b39'>";//google的色值String postTag = "</font>";SearchQuery searchQuery = new NativeSearchQueryBuilder().withQuery(matchQuery("ideaTitle", content)).withQuery(matchQuery("ideaContent", content)).withHighlightFields(new HighlightBuilder.Field("ideaTitle").preTags(preTag).postTags(postTag),new HighlightBuilder.Field("ideaContent").preTags(preTag).postTags(postTag)).build();searchQuery.setPageable(pageable);// 不需要高亮直接return ideas // AggregatedPage<Idea> ideas = elasticsearchTemplate.queryForPage(searchQuery, Idea.class);// 高亮字段AggregatedPage<Idea> ideas = elasticsearchTemplate.queryForPage(searchQuery, Idea.class, new SearchResultMapper() {@Overridepublic <T> AggregatedPage<T> mapResults(SearchResponse response, Class<T> clazz, Pageable pageable) {List<Idea> chunk = new ArrayList<>();for (SearchHit searchHit : response.getHits()) {if (response.getHits().getHits().length <= 0) {return null;}Idea idea = new Idea();//name or memoeHighlightField ideaTitle = searchHit.getHighlightFields().get("ideaTitle");if (ideaTitle != null) {idea.setIdeaTitle(ideaTitle.fragments()[0].toString());}HighlightField ideaContent = searchHit.getHighlightFields().get("ideaContent");if (ideaContent != null) {idea.setIdeaContent(ideaContent.fragments()[0].toString());}chunk.add(idea);}if (chunk.size() > 0) {return new AggregatedPageImpl<>((List<T>) chunk);}return null;}});return ideas;}

其他基礎接口直接使用 ideaRepository.

高亮寫法借鑒代碼地址點我
其他方式查詢寫法地址點我

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