Spring Boot整合Elasticsearch全文搜索引擎

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# Spring Boot整合Elasticsearch全文搜索引擎 #

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2017.11.02 17:38  字数 398 阅读 52 评论 0 喜欢 2

这篇文章介绍Spring Boot整合Elasticsearch全文搜索引擎，需要springboot实战完整视频教程的，点击[这里][Link 1]！

Elastic Search是一个开源的，分布式，实时搜索和分析引擎。Spring Boot为Elasticsearch及Spring Data Elasticsearch提供的基于它的抽象提供了基本的配置。Spring Boot提供了一个用于聚集依赖的spring-boot-starter-data-elasticsearch 'StarterPOM'。

引入spring-boot-starter-data-elasticsearch依赖，在pom.xml配置文件中增加如下内容（基于之前章节“Spring Boot 构建框架”中的pom.xml文件）：

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

可以像其他Spring beans那样注入一个自动配置的ElasticsearchTemplate或Elasticsearch客户端实例。默认情况下，该实例将尝试连接到一个本地内存服务器（在Elasticsearch项目中的一个NodeClient），但可以通过设置spring.data.elasticsearch.clusterNodes为一个以逗号分割的host:port列表来将其切换到一个远程服务器（比如，TransportClient）。

@Component
    public class MyBean {
        private ElasticsearchTemplate template;
        
        @Autowired
        public MyBean(ElasticsearchTemplate template) {
            this.template = template;
        }
        // ...
    }

如果添加一个自己的ElasticsearchTemplate类型的@Bean，它将替换默认的。

应用集成ElasticSearch案例  
新建elasticsearch.properties配置文件，添加如下配置内容：

elasticsearch.host=localhost
    elasticsearch.port=9300

ElasticSearch配置，读取elasticsearch.properties配置文件信息，具体代码如下：

@Configuration@PropertySource(value = "classpath:elasticsearch.properties")
    @EnableElasticsearchRepositories(basePackages = "co.paan.repository")
    public class ElasticsearchConfiguration {
        @Resource
    private Environment environment;
    @Bean
    public Client client() {
    TransportClient client = new TransportClient();
    TransportAddress address = new InetSocketTransportAddress(environment.getProperty("elasticsearch.host"), Integer.parseInt(environment.getProperty("elasticsearch.port")));
    client.addTransportAddress(address);        
    return client;
    }
        @Beanpublic ElasticsearchOperations elasticsearchTemplate() {
            return new ElasticsearchTemplate(client());
        }
    }

两个实体类，具体代码如下：

@Document(indexName = "post", type = "post", shards = 1, replicas = 0)
    public class Post {
    @Id
    private String id;
        private String title;
    @Field(type= FieldType.Nested)
    private List<Tag> tags;   
     public String getId() {
    return id;
    }
        public void setId(String id) {
            this.id = id;
    }
        public String getTitle() {
            return title;
    }
        public void setTitle(String title) {
            this.title = title;
    }
        public List<Tag> getTags() {
            return tags;
    }
        public void setTags(List<Tag> tags) {
            this.tags = tags;
    }
    }
    public class Tag {
    private String id;   
    private String name;   
    public String getId() {
            return id;
        }
        public void setId(String id) {
            this.id = id;
        }
        public String getName() {
            return name;
        }
        public void setName(String name) {
            this.name = name;
        }
    }

数据源继承ElasticsearchRepository类，封装接口代码如下：

public interface PostRepository extends ElasticsearchRepository<Post, String>{
        Page<Post> findByTagsName(String name, Pageable pageable);
    }

数据服务接口及实现类，代码如下：

public interface PostService {
        Post save(Post post);
        Post findOne(String id);
        Iterable<Post> findAll();
        Page<Post> findByTagsName(String tagName, PageRequest pageRequest);
    }
    @Servicepublic class PostServiceImpl implements PostService{
        @Autowired
    private PostRepository postRepository;
    @Override
    public Post save(Post post) {
            postRepository.save(post);        
                  return post;
           }
        @Overridepublic Post findOne(String id) {
            return postRepository.findOne(id);
       }
        @Overridepublic Iterable<Post> findAll() {
            return postRepository.findAll();
       }
        @Overridepublic Page<Post> findByTagsName(String tagName, PageRequest pageRequest) {
            return postRepository.findByTagsName(tagName, pageRequest);
       }
    }

测试代码如下：

@Test
    public void testFindByTagsName() throws Exception {
        Tag tag = new Tag();
        tag.setId("1");
        tag.setName("tech");
        Tag tag2 = new Tag();
        tag2.setId("2");
        tag2.setName("elasticsearch");
        Post post = new Post();
        post.setId("1");
        post.setTitle("Bigining with spring boot application and elasticsearch");
        post.setTags(Arrays.asList(tag, tag2));
        postService.save(post);
        Post post2 = new Post();
        post2.setId("1");
        post2.setTitle("Bigining with spring boot application");
        post2.setTags(Arrays.asList(tag));
        postService.save(post);
        Page<Post> posts  = postService.findByTagsName("tech", new PageRequest(0,10));
        Page<Post> posts2  = postService.findByTagsName("tech", new PageRequest(0,10));
        Page<Post> posts3  = postService.findByTagsName("maz", new PageRequest(0,10));
        assertThat(posts.getTotalElements(), is(1L));
        assertThat(posts2.getTotalElements(), is(1L));
        assertThat(posts3.getTotalElements(), is(0L));
    }

> 来源：素文宅博客  
> 链接：[https://blog.yoodb.com/yoodb/article/detail/1412][https_blog.yoodb.com_yoodb_article_detail_1412]

[96]: /images/20220606/723798902ea249b7b7b3d02fcf4fd17f.png|/images/20220606/723798902ea249b7b7b3d02fcf4fd17f.png
[96_]: http://www.jianshu.com/u/a3cf390cb5fe
[Link 1]: http://www.roncoo.com/course/view/c99516ea604d4053908c1768d6deee3d
[https_blog.yoodb.com_yoodb_article_detail_1412]: https://blog.yoodb.com/yoodb/article/detail/1412