SpringBoot整合ElasticSearch搜索引擎之一

1、ElasticSearch

Elasticsearch是一個基於Apache Lucene(TM)的開源搜索引擎。無論在開源還是專有領域，Lucene可以被認爲是迄今爲止最先進、性能最好的、功能最全的搜索引擎庫。

2、添加依賴

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

3、創建ElasticSearchConfig

@Configuration
@EnableElasticsearchRepositories("com.lianggzone.springboot.action.data.elasticsearch")
public class ElasticsearchConfig2 {
 
    private String hostname = "127.0.0.1";
    private int port = 9300;
 
    @Bean
    public ElasticsearchOperations elasticsearchTemplate() {
        return new ElasticsearchTemplate(client());
    }
 
    @Bean
    public Client client() {
        TransportClient client = new TransportClient();
        TransportAddress address = new InetSocketTransportAddress(hostname, port);
 
        client.addTransportAddress(address);
        return client;
    }
}

4、創建Controller

@RestController
@RequestMapping(value="/data/elasticsearch/news")
public class NewsController {
 
    @Autowired
    private NewsService newsService;
 
    /**
     * 初始化
     * @param request
     */
    @RequestMapping(value = "/init", method = RequestMethod.POST)
    public void init(HttpServletRequest request) {
        this.newsService.init();
    }
 
    /**
     * findAll        
     * @param request
     * @return
     */
    @RequestMapping(value = "/", method = RequestMethod.GET)
    public Map<String, Object> findList(HttpServletRequest request) {
        Map<String, Object> params = new HashMap<String, Object>();
        params.put("items", this.newsService.findAll());
        return params;
    }
 
    /**
     * find      
     * @param request
     * @return
     */
    @RequestMapping(value = "/{title}", method = RequestMethod.GET)
    public Map<String, Object> search(@PathVariable String title) {
        // 構建查詢條件
        QueryBuilder queryBuilder = QueryBuilders.queryString(title);
        Map<String, Object> params = new HashMap<String, Object>();
        params.put("items", this.newsService.search(queryBuilder));
        return params;
    }
}