将Spring Data ElasticSearch3.1.3版本升级迁移到4.3.3版本

        最近需要迁移以前的ElasticSearch相关代码到现在的项目，迁移过来后发现很多类方法接口要么显示过时要么直接没呢，我想是因为现在项目的SpringBoot的版本比之前要新很多，然后又不想还是用原来老版本的Spring Data ElasticSearch，所以就升级迁移新版本。

        ElasticSearch配置文件

3.1.3版本

     TransportClient客户端现在官方已经不推荐，而且表示以后会弃用它

@Configuration
public class ElasticsearchConfig {

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

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

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

    @Bean
    public Client client() {
        Settings settings = Settings.builder().put("cluster.name", cluster).build();
        TransportClient client = new PreBuiltTransportClient(settings);
        try {
            client.addTransportAddress(new TransportAddress(InetAddress.getByName(ip), port));
        } catch (UnknownHostException e) {
            e.printStackTrace();
        }
        return client;
    }

}

4.3.3版本

     这里用的是官方推荐的RestHighLevelClient客户端，将会替代TransportClient

@Configuration
public class ElasticsearchConfig {

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

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

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


    @Bean
    public RestHighLevelClient client() {
        ClientConfiguration clientConfiguration = null;
        try {
            clientConfiguration = ClientConfiguration.builder()
                    .connectedTo(ip+":"+port)
                    .build();
        }catch (Exception e){
            e.printStackTrace();
        }
        return RestClients.create(clientConfiguration).rest();
    }
}

Spring Data Elasticsearch - Reference Documentationhttps://docs.spring.io/spring-data/elasticsearch/docs/current/reference/html/

 

@Document

     3.1.3的type在4.3.3中已去掉

        3.1.3版本

@Persistent
@Inherited
@Retention(RetentionPolicy.RUNTIME)
@Target({ElementType.TYPE})
public @interface Document {
    String indexName();

    String type() default "";

    boolean useServerConfigura