ElasticSearch學習之(八)--簡單ES項目構建

該博文主要描述springboot 集成ES7.3.0版本的項目構建，以及簡單的數據同步功能實現。廢話不多說直接上乾貨！

1. 初始化springboot項目，引入elastic search 7.3.0的pom依賴。

<!--elasticsearch相關依賴-->
        <dependency>
            <groupId>org.elasticsearch</groupId>
            <artifactId>elasticsearch</artifactId>
            <version>7.3.0</version>
        </dependency>
        <dependency>
            <groupId>org.elasticsearch.client</groupId>
            <artifactId>elasticsearch-rest-client</artifactId>
            <version>7.3.0</version>
        </dependency>
        <dependency>
            <groupId>org.elasticsearch.client</groupId>
            <artifactId>elasticsearch-rest-high-level-client</artifactId>
            <version>7.3.0</version>
        </dependency>
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>fastjson</artifactId>
            <version>1.2.55</version>
            <scope>compile</scope>
        </dependency>

2. 完善ES的相關核心配置

######################ES集羣庫配置######################
elasticsearch:
  ip: 127.0.0.1
  port: 9200
  clusterName: elasticsearch_lgh
  #username: elastic
  #password: search

3. 初始化ES的核心配置類

@Configuration
public class ElasticSearchConfig {

    @Value("${elasticsearch.ip}")
    private String ip;

    @Value("${elasticsearch.port}")
    private int port;

    @Bean
    public RestClient getRestClient(){
        return getRestHighLevelClient().getLowLevelClient();
    }

    @Bean
    public RestHighLevelClient getRestHighLevelClient() {

        List<HttpHost> hosts = new ArrayList<>();
        for(String s : ip.split(",")){
            hosts.add(new HttpHost(s, port, "http"));
        }

        RestClientBuilder builder = RestClient.builder(hosts.toArray(new HttpHost[hosts.size()]))
                .setHttpClientConfigCallback(httpClientBuilder -> httpClientBuilder.setDefaultCredentialsProvider(credentialsProvider));

        return new RestHighLevelClient(builder);
    }
}

這樣springboot項目就成功集成了ES，正常啓動項目即可，下一篇爲大家奉上如何使用代碼完成讀取數據庫的數據寫到ES當中。

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