Spring Boot整合Elasticsearch实现全文搜索引擎案例解析

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

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

elasticsearch.host=localhost
elasticsearch.port=9300

@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());
 }
}

@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;
 }
}

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

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);
 }
}

@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));
}