本节我们基于一个发表文章的案例来说明SpringBoot如何elasticsearch集成。elasticsearch本身可以是一个独立的服务,也可以嵌入我们的web应用中,在本案例中,我们讲解如何将elasticsearch嵌入我们的应用中。

案例背景:每个文章(Article)都要属于一个教程(Tutorial),而且每个文章都要有一个作者(Author)。

一、实体设计:

Tutorial.java

public class Tutorial implements Serializable{
    private Long id;
    private String name;//教程名称
    
    //setters and getters
    //toString
}

Author.java

public class Author implements Serializable{
    /**
     * 作者id
     */
    private Long id;
    /**
     * 作者姓名
     */
    private String name;
    /**
     * 作者简介
     */
    private String remark;
    
    //setters and getters
    //toString
    
}

Article.java

public class Article implements Serializable{
    private Long id;
    /**标题*/
    private String title;
    /**摘要*/
    private String abstracts;
    /**内容*/
    private String content;
    /**发表时间*/
    private Date postTime;
    /**点击率*/
    private Long clickCount;
    /**作者*/
    private Author author;
    /**所属教程*/
    private Tutorial tutorial;
    
    //setters and getters
    //toString
}

二、整合SpringBoot与ElasticSearch

1、引入相应的依赖

pom.xml

<parent>
        <groupId> org.springframework.boot </groupId>
        <artifactId> spring-boot-starter-parent </artifactId>
        <version> 1.3.0.RELEASE </version>
    </parent>
    
    <dependencies>
            <!-- 添加 web 应用的依赖 -->
        <dependency>
            <groupId> org.springframework.boot </groupId>
            <artifactId> spring-boot-starter-web </artifactId>
        </dependency>
        <!-- 添加 spring-data-elasticsearch的依赖 -->
        <dependency>
            <groupId> org.springframework.boot </groupId>
            <artifactId> spring-boot-starter-data-elasticsearch </artifactId>
        </dependency>
        <dependency>
            <groupId> org.springframework.boot</groupId>
            <artifactId> spring-boot-starter-test </artifactId>
        </dependency>
    </dependencies>

2、修改配置文件

application.yml

spring:
   data:
        elasticsearch: 
            cluster-name: #默认为elasticsearch
            cluster-nodes: #配置es节点信息,逗号分隔,如果没有指定,则启动ClientNode
            properties:
                path:
                  logs: ./elasticsearch/log #elasticsearch日志存储目录
                  data: ./elasticsearch/data #elasticsearch数据存储目录

这些配置的属性,最终会设置到ElasticsearchProperties这个实体中。

 

3、为实体添加ElascticSearch的注解

Spring-data-elasticSearch提供了一些注解来帮助我们快速针对实体建立索引。

QQ截图20160221152519.png

因为我们希望Article作为我们文章的搜索入口,所以我们在Article类上添加@Document注解。

@Document(indexName="projectname",type="article",indexStoreType="fs",shards=5,replicas=1,refreshInterval="-1")
public class Article implements Serializable{
....
}

默认情况下,添加@Document注解会对实体中的所有属性建立索引,由于本教程是讲解如何整合,并不是专门讲解ElasticSearch,故对于其他注解不再讲解。

4、建立搜索类

我们只要编写一个接口ArticleSearchRepository,来继承Spring-data-elasticSearch提供的ElasticsearchRepository即可。

import org.springframework.data.elasticsearch.repository.ElasticsearchRepository;
 
import com.tianshouzhi.springbootstudy.domain.Article;
//泛型的参数分别是实体类型和主键类型
public interface ArticleSearchRepository extends ElasticsearchRepository<Article, Long>{
 
}

5、单元测试

5.1、创建索引

@RunWith(SpringJUnit4ClassRunner.class)
@SpringApplicationConfiguration(classes = Application.class)
public class ElasticSearchTest {
 
    @Autowired
    private ArticleSearchRepository articleSearchRepository;
    @Test
    public void testSaveArticleIndex(){
        Author author=new Author();
        author.setId(1L);
        author.setName("tianshouzhi");
        author.setRemark("java developer");
        
        Tutorial tutorial=new Tutorial();
        tutorial.setId(1L);
        tutorial.setName("elastic search");
        
        Article article =new Article();
        article.setId(1L);
        article.setTitle("springboot integreate elasticsearch");
        article.setAbstracts("springboot integreate elasticsearch is very easy");
        article.setTutorial(tutorial);
        article.setAuthor(author);
        article.setContent("elasticsearch based on lucene,"
                + "spring-data-elastichsearch based on elaticsearch"
                + ",this tutorial tell you how to integrete springboot with spring-data-elasticsearch");
        article.setPostTime(new Date());
        article.setClickCount(1L);
        
        articleSearchRepository.save(article);
    }
    
}

运行单元测试,项目根目录下出现:

QQ截图20160221160352.png

说明我们索引已经创建成功。

5.2测试搜索:

@Test
    public void testSearch(){
        String queryString="springboot";//搜索关键字
        QueryStringQueryBuilder builder=new QueryStringQueryBuilder(queryString);
        Iterable<Article> searchResult = articleSearchRepository.search(builder);
        Iterator<Article> iterator = searchResult.iterator();
        while(iterator.hasNext()){
            System.out.println(iterator.next());
        }
    }

运行单元测试,控制台输出

Article [id=1, title=springboot integreate elasticsearch, abstracts=springboot integreate elasticsearch is very easy, content=elasticsearch based on lucene,spring-data-elastichsearch based on elaticsearch,this tutorial tell you how to integrete springboot with spring-data-elasticsearch, postTime=Sun Feb 21 16:01:37 CST 2016, clickCount=1, author=Author [id=1, name=tianshouzhi, remark=java developer], tutorial=Tutorial [id=1, name=elastic search]]

说明搜索成功。读者可以尝试其他的搜索关键字进行搜索。

 

说明:以上方式是SpringBoot与ElasticSearch进行本地整合,即将ElasticSearch内嵌在应用,如果我们搭建了ElasticSearch集群,只需要将配置改为如下配置即可:

spring:
    data:
        elasticsearch: 
            cluster-nodes:115.28.65.149:9300 #配置es节点信息,逗号分隔,如果没有指定,则启动ClientNode

 

转载于:http://www.tianshouzhi.com/api/tutorials/springboot/101