springboot elasticsearch 集成

添加依赖spring-boot-starter-data-elasticsearch

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

spring-boot-starter-web是为测试使用。

添加es连接配置

spring:
  elasticsearch:
    rest:
      uris: http://localhost:9200
      username: elastic
      password: 888888

然后可以直接使用RestHighLevelClient对象，spring已经生成对应bean实例。

建一个测试controller

    @Resource
    private RestHighLevelClient restHighLevelClient;

    @RequestMapping("/get/{id}")
    public @ResponseBody String get(@PathVariable("id") String id) throws IOException {
        GetRequest request = new GetRequest("test",id);
        GetResponse response = restHighLevelClient.get(request, RequestOptions.DEFAULT);
        if(response.isExists()){
            return JSON.toJSONString(response.getSourceAsMap());
        }else{
            return "not exists";
        }
    }

访问测试地址验证。

也可自定义client bean实例化方式。

@Configuration
public class RestClientConfig extends AbstractElasticsearchConfiguration {

    @Override
    @Bean
    public RestHighLevelClient elasticsearchClient() {
        RestClientBuilder builder = RestClient.builder(
                new HttpHost("localhost",9200,"http"));
        CredentialsProvider credentialsProvider = new BasicCredentialsProvider();
        credentialsProvider.setCredentials(AuthScope.ANY, new UsernamePasswordCredentials("elastic","888888"));
        builder.setHttpClientConfigCallback(httpAsyncClientBuilder -> {
            httpAsyncClientBuilder.setDefaultCredentialsProvider(credentialsProvider);
            return httpAsyncClientBuilder;
        });
        return new RestHighLevelClient(builder);
    }
}