
- 一、Spring Data简介
- 二、Spring Data ElasticSearch简介
- 二、基础入门案例
- 1.导入Spring Data ElasticSearch坐标
- 2.启动器配置文件
- 3.编写实体Article
- 4.编写Dao
- 5.创建测试类
一、Spring Data简介
Spring Data是一个用于简化数据库访问,并支持云服务的开源框架。其主要目标是使得对数据的访问变得方便快捷,并支持map-reduce框架和云计算数据服务。 Spring Data可以极大的简化JPA的写法,可以在几乎不用写实现的情况下,实现对数据的访问和 *** 作。除了CRUD外,还包括如分页、排序等一些常用的功能。
二、Spring Data ElasticSearch简介Spring Data ElasticSearch 基于 spring data API 简化 elasticSearch *** 作,将原始 *** 作elasticSearch的客户端API 进行封装 。Spring Data为Elasticsearch项目提供集成搜索引擎。Spring Data Elasticsearch POJO的关键功能区域为中心的模型与Elastichsearch交互文档和轻松地编写一个存储库数据访问层。
二、基础入门案例 1.导入Spring Data ElasticSearch坐标2.启动器配置文件4.0.0 org.springframework.boot spring-boot-starter-parent2.1.16.RELEASE com.example demo0.0.1-SNAPSHOT demo Demo project for Spring Boot 1.8 org.springframework.boot spring-boot-starter-data-elasticsearchorg.springframework.boot spring-boot-starter-testtest org.springframework.boot spring-boot-maven-plugin
package com.example.demo;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
public class DemoApplication {
public static void main(String[] args) {
SpringApplication.run(DemoApplication.class, args);
}
}
spring: data: elasticsearch: cluster-name: my-elasticsearch cluster-nodes: 192.168.220.100:93003.编写实体Article
@document(indexName = "lxs_blog", type = "article")
public class Article {
@Id
@Field(type = FieldType.Long, store = true)
private long id;
@Field(type = FieldType.Text, store = true, analyzer = "ik_smart")
private String title;
@Field(type = FieldType.Text, store = true, analyzer = "ik_smart")
private String content;
。。。
}
4.编写Dao
方法命名规则查询的基本语法findBy + 属性 + 关键词 + 连接符 + 属性 + 关键词。。。
方法中使用like才会分词
package com.lxs.esdemo2.dao;
import com.lxs.esdemo2.domain.Article;
import org.springframework.data.domain.Pageable;
import org.springframework.data.elasticsearch.repository.ElasticsearchRepository;
import java.util.List;
public interface ArticleDao extends ElasticsearchRepository {
public List findByTitleLike(String title);
public List findByTitle(String title);
public List findByTitleLikeOrContent(String title, String content);
public List findByTitleOrContent(String title, String content, Pageable pageable);
}
5.创建测试类
package com.lxs.esdemo2;
import com.lxs.esdemo2.dao.ArticleDao;
import com.lxs.esdemo2.domain.Article;
import org.elasticsearch.index.query.QueryBuilders;
import org.elasticsearch.search.aggregations.AggregationBuilders;
import org.elasticsearch.search.aggregations.bucket.terms.StringTerms;
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.PageRequest;
import org.springframework.data.domain.Pageable;
import org.springframework.data.elasticsearch.core.ElasticsearchTemplate;
import org.springframework.data.elasticsearch.core.aggregation.AggregatedPage;
import org.springframework.data.elasticsearch.core.query.FetchSourceFilter;
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.List;
@RunWith(SpringRunner.class)
@SpringBootTest
public class EsDemo2ApplicationTests {
@Autowired
private ArticleDao dao;
@Autowired
private ElasticsearchTemplate template;
@Test
public void createIndex() {
// template.createIndex(Article.class);
//配置mapping
template.putMapping(Article.class);
}
@Test
public void adddocument() throws Exception {
for (int i = 1; i <= 20; i++) {
//创建一个Article对象
Article article = new Article();
article.setId(new Long(i));
article.setTitle("女护士路遇昏迷男子跪地抢救:救人是职责更是本能" + i);
article.setContent("这是一个美丽的女护士妹妹" + i);
//把文档写入索引库
dao.save(article);
}
}
@Test
public void deletedocumentById() throws Exception {
dao.deleteById(3l);
//全部删除
// articleRepository.deleteAll();
}
@Test
public void findAll() {
dao.findAll().forEach(System.out :: println);
}
@Test
public void findById() {
System.out.println(dao.findById(1l));
}
@Test
public void findByTitle() {
dao.findByTitleLike("美丽女护士").forEach(System.out :: println);
}
@Test
public void findByTitleOrContent() {
dao.findByTitleLikeOrContent("美丽女护士", "男护士").forEach(System.out :: println);
}
@Test
public void findByTitlePage() {
Pageable pageable = PageRequest.of(1, 5);
dao.findByTitleOrContent("女护士","女护士", pageable).forEach(System.out :: println);
}
@Test
public void testNativeSearchQuery() throws Exception {
NativeSearchQuery query = new NativeSearchQueryBuilder()
.withQuery(QueryBuilders.queryStringQuery("女护士").defaultField("title"))
.withPageable(PageRequest.of(1, 5))
.build();
template.queryForList(query, Article.class).forEach(System.out :: println);
}
}
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