Elasticsearch 5.X Java API 创建客户端

import java.net.InetAddress;
import java.net.UnknownHostException;
import org.elasticsearch.action.get.GetResponse;
import org.elasticsearch.client.transport.TransportClient;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.common.transport.InetSocketTransportAddress;
import org.elasticsearch.transport.client.PreBuiltTransportClient;
public class CreateClient
{
    public static void main(String[] args)
    {
        // elasticsearch为集群名称，根据elasticsearch.yml中cluster.name设置，默认elasticsearch
        Settings settings = Settings.builder().put("cluster.name", "elasticsearch").build();
        TransportClient client = null;
        try
        {
            client = new PreBuiltTransportClient(settings).addTransportAddress(new InetSocketTransportAddress(InetAddress.getByName("127.0.0.1"), 9300));
        }
        catch (UnknownHostException e)
        {
            e.printStackTrace();
        }
        // index:索引，type:类型，id:文档id
        GetResponse response = client.prepareGet("hbdss", "patient", "1").execute().actionGet();
        System.out.println(response.getSourceAsString());
        client.close();
    }
}