SpringBoot - 整合ElasticSearch及基本使用

整合ElasticSearch

一、引入依赖及配置

1、引入依赖

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

2、配置yml

spring:
  data:
    elasticsearch:
      cluster-name: elasticsearch      # 集群名字
      cluster-nodes: localhost:9300    # 集群结点，多个节点用逗号隔开

二、Repository接口的使用

Repository就是ES的Dao，和JPA的里的用法大致一样。

1、创建实体类

这里以Article类为例，介绍了注解常用的用法，更多用法可以百度~

@Data      // lombok生成get/set
// indexName：ElasticSearch里的索引名      type：类型名
@Document(indexName = "lcy_article",type = "article")
public class Article {
   
   
    @Id     // Id标识主键
    // Field标识属性，type：属性类型，store：是否存储，默认否，index：是否索引，默认是，analyzer：分词的方式
    @Field(type = FieldType.Long,store = true)
    private Long id;
    @Field(type = FieldType.Keyword,store = true)
    private String author;
    @Field(type = FieldType.Text,store = true,analyzer = "ik_smart")
    private String title;
    @Field(type = FieldType.Text,store = true,analyzer = "ik_smart")
    private String content;
    @Field(type = FieldType.Integer,store = true)
    private Integer price;

    public Article() {
   
   

    }

    public Article(Long id, String author, String title, String content,Integer price) {
   
   
        this.id = id;
        this.author = author;
        this.title = title;
        this.content = content;
        this.price = price;
    }

    @Override
    public String toString() {
   
   
       return "ID：" + id + "\t\t标题：" + title + "\t\t作者：" + author + "\t\t内容：" + content;
    }
}

2、继承ElasticSearchRepository接口

// ElasticsearchRepository<文档类型,主键类型>
public interface ArticleRepository extends ElasticsearchRepository<Article,Long> {
   
   
    // 自定义查询 - 符合方法命名规范即可
    List<Article> findByTitle(String title);
    List<Article> findByIdBetween(Long start,Long end);
}

启动类上需要添加EnableElasticsearchRepositories注解扫描Repository接口。

@SpringBootApplication
@EnableElasticsearchRepositories(basePackages = "pers.liuchengyin.es.repository")     // 配置ES扫描repository的包
public class Application {
   
   
    public static void main(String[] args) {
   
   
        SpringApplication.run(Application.class,args);
    }
}

3、测试

@RunWith(SpringRunner.class)
@SpringBootTest
public class ArticleTest {