• 3.1 SpringBoot整合ElasticSearch


    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

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  • 原文地址:https://www.cnblogs.com/it-deepinmind/p/13490490.html
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