这篇文章主要介绍“如何使用springData来操作es”,在日常操作中,相信很多人在如何使用springData来操作es问题上存在疑惑,小编查阅了各式资料,整理出简单好用的操作方法,希望对大家解答”如何使用springData来操作es”的疑惑有所帮助!接下来,请跟着小编一起来学习吧!
1 Es 的配置文件 elasticsearch.yml
http.cors.enabled: true http.cors.allow-origin: "*" network.host: 127.0.0.1
2 配置中文分词器 (见之前的博客)
3 导入jar
<?xml version="1.0" encoding="UTF-8"?> <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>2.1.7.RELEASE</version> <relativePath/> <!-- lookup parent from repository --> </parent> <groupId>com.example</groupId> <artifactId>demo</artifactId> <version>0.0.1-SNAPSHOT</version> <name>demo</name> <description>Demo project for Spring Boot</description> <properties> <java.version>1.8</java.version> </properties> <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-data-elasticsearch</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-test</artifactId> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> </plugin> </plugins> </build> </project>
4 编写配置文件 (7.3 暂时springdata暂时不支持)
# elasticsearch-6.5.4 需要再配置文件配置上ip地址 spring.data.elasticsearch.cluster-name=elasticsearch spring.data.elasticsearch.cluster-nodes=127.0.0.1:9300 #设置连接超时时间 spring.data.elasticsearch.properties.transport.tcp.connect_timeout=120s
5 实体类上增加注解
/** * @author shihaifeng * @date 2019-08-29 14:06 * @desc (描述) **/ @Document(indexName = "book",type = "user") public class Book implements Serializable{ @Id //主键 private Integer id; @Field(type = FieldType.Text, analyzer = "ik_max_word") private String name; @Field(type = FieldType.Text, analyzer = "ik_max_word") private String context; @Field(type = FieldType.Text, analyzer = "ik_smart") private String auto; }
6 编写接口
package com.example.demo.inter; import com.example.demo.entity.Book; import org.springframework.data.elasticsearch.repository.ElasticsearchRepository; /** * @author shihaifeng * @date 2019-08-29 14:47 * @desc (书接口 - 用来直接操作) * * Book 实体对象 * Integer 是主键 **/ public interface IBookServer extends ElasticsearchRepository<Book,Integer> { }
7 测试
package com.example.demo; import com.example.demo.entity.Book; import com.example.demo.inter.IBookServer; import org.elasticsearch.action.search.SearchResponse; import org.elasticsearch.index.query.QueryBuilders; import org.elasticsearch.index.query.TermQueryBuilder; import org.elasticsearch.search.SearchHit; import org.elasticsearch.search.SearchHits; import org.elasticsearch.search.fetch.subphase.highlight.HighlightBuilder; import org.elasticsearch.search.fetch.subphase.highlight.HighlightField; import org.junit.Test; import org.junit.runner.RunWith; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.boot.test.context.SpringBootTest; import org.springframework.data.domain.Page; 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.NativeSearchQuery; import org.springframework.data.elasticsearch.core.query.NativeSearchQueryBuilder; import org.springframework.test.context.junit4.SpringRunner; import java.util.*; ; /** * @author shihaifeng * @date 2019-08-29 14:52 * @desc (描述) **/ @RunWith(SpringRunner.class) @SpringBootTest public class BookTest { @Autowired private IBookServer bookServer; @Autowired private ElasticsearchTemplate elasticsearchTemplate; /** * 添加数据 */ @Test public void addBook() { //添加一条数据 bookServer.save(new Book(1, "书名", "书内容", "作者")); List<Book> list = new ArrayList<>(); list.add(new Book(2, "《阿弥陀佛么么哒》", "大冰,本名焉冰,1980年10月23日出生于山东省烟台市莱阳市,中国内地主持人、民谣歌手、作家、油画画师,毕业于山东艺术学院。", "大冰")); list.add(new Book(3, "《我不》", "善意能消戾,善意能得缘,善意能带业往生,善意能回头是岸。 善意能够帮人捕捉并建立起独特的幸福感。 “我不”是一种善意坦然,也是一种善意的随缘,更是一句善意的自省", "大冰")); list.add(new Book(4, "《乖,摸摸头》", "是由主持人大冰所著,湖南文艺出版社的一本记录了大冰十余年的江湖游历,以及他和他朋友们的爱与温暖的传奇故事的书籍。", "大冰")); list.add(new Book(5, "《他们最幸福》", "书中讲述的故事是有关于主角大冰一段十年的精彩生长之路,也是路途中十个不同他们幸福的故事,更是一段对当下价值观有形无声的生活抗议。 多栖身份的大冰,从主持人到民谣歌手,从江湖游侠到资深文青,他抱着一只手鼓行唱在天涯中,却从未将故事写在纸面上。", "大冰")); list.add(new Book(6, "《边城》", "沈从文的创作风格趋向浪漫主义,他要求小说的诗意效果,融写实、纪梦、象征于一体,语言格调古朴,\n" + "沈从文及其作品沈从文及其作品(5张)句式简峭、主干突出,单纯而又厚实,朴讷而又传神", "沈从文")); list.add(new Book(7, "《湘行散记》", "沈从文是具有特殊意义的乡村世界的主要表现者和反思者,他认为“美在生命”,虽身处于虚伪、自私和冷漠的都市,却醉心于人性之美", "沈从文")); list.add(new Book(8, "《长河》", "“我不知道为什么忽然爱上你了。”身为任课教师的沈从文悄悄地给学生张兆和写信,他在信里这么说。", "沈从文")); bookServer.saveAll(list);//批量添加数据 } /** * 查询信息 */ @Test public void query() { Optional<Book> book = bookServer.findById(3); System.out.println("------------findById-----------------"); System.out.println(book.get().toString()); Iterable<Book> books = bookServer.findAll(); System.out.println("------------findAll-----------------"); for (Book book1 : books) { System.out.println(book1); } System.out.println("------------search QueryBuilder-----------------"); Page<Book> search = bookServer.search(new TermQueryBuilder("context", "沈从文"), PageRequest.of(0, 10)); for (Book book1 : search.getContent()) { System.out.println(book1); } System.out.println("------------search SearchQuery (高亮显示)-----------------"); NativeSearchQuery searchQuery = new NativeSearchQueryBuilder() .withQuery(QueryBuilders.termQuery("context", "沈从文")) //设置查询内容 .withHighlightFields(new HighlightBuilder.Field("context").preTags("<前缀>").postTags("</后缀>")).build() //设置高亮显示 .setPageable(PageRequest.of(0, 10));//设置分页信息 AggregatedPage<Book> page = elasticsearchTemplate.queryForPage(searchQuery, Book.class, new SearchResultMapper() { @Override public <T> AggregatedPage<T> mapResults(SearchResponse searchResponse, Class<T> aClass, Pageable pageable) { //返回结果集重新映射 List<Book> list = new ArrayList<>(); SearchHits hits = searchResponse.getHits(); Iterator<SearchHit> iterator = hits.iterator(); while (iterator.hasNext()){ Book book = new Book(); SearchHit searchHit = iterator.next(); Map<String, Object> source = searchHit.getSourceAsMap(); book.setId(Integer.valueOf(source.get("id").toString()));//设置id book.setName(source.get("name").toString());//设置书名 book.setAuto(source.get("auto").toString());//设置作者 Map<String, HighlightField> highlightFields = searchHit.getHighlightFields();//获取高亮显示的列 book.setContext(highlightFields.get("context").toString());//设置高亮显示的列 System.out.println("高亮显示的值是 = " + highlightFields.get("context")); list.add(book); } //返回查询的结果 return new AggregatedPageImpl(list); } }); List<Book> content = page.getContent(); System.out.println("查出的总数是 = " + content.size()); } /** * 跟新数据 */ @Test public void update(){ bookServer.save(new Book(1, "书名3", "书内容3", "作者3")); } /** * 删除数据 */ @Test public void delete(){ bookServer.delete(new Book(1, "书名3", "书内容3", "作者3")); } }
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