elasticsearch的两种初始化方式

public ESConfiguration()
    {
        if(EnvUtils.isOnlineEnv())
        {
            hostName = "xxxxx1";
            hostName2 = "xxxx2";
            hostName3 = "xxxx3";
            port = "9300";
            clusterName = "yyyy";
        }else {
            hostName = "vvvvv1";
            hostName2 = "vvvv2";
            hostName3 = "vvvv3";
            port = "9300";
            clusterName = "zzzz";
        }
        createTransportClient();
    }

    public void createTransportClient()
    {
        try {
            // 配置信息 -- 配置 集群的名字 + 连接池的个数
            Settings esSetting = Settings.builder().put("cluster.name", clusterName)    　　 //设置连接的集群名称
                    .put("client.transport.sniff", false)    　　　　　　　　　　　　　　　　　　 //增加嗅探机制，找到ES集群
                    .put("thread_pool.search.size", Integer.parseInt(poolSize))    　　　　  // 增加线程池个数，暂时设为5
                    .build();

            client = new PreBuiltTransportClient(esSetting);
            //配置host 和 端口port
            InetSocketTransportAddress inetSocketTransportAddress = new InetSocketTransportAddress(InetAddress.getByName(hostName), Integer.valueOf(port));
              InetSocketTransportAddress inetSocketTransportAddress2 = new InetSocketTransportAddress(InetAddress.getByName(hostName2), Integer.valueOf(port));
              InetSocketTransportAddress inetSocketTransportAddress3 = new InetSocketTransportAddress(InetAddress.getByName(hostName3), Integer.valueOf(port));
            client.addTransportAddresses(inetSocketTransportAddress).addTransportAddresses(inetSocketTransportAddress2).addTransportAddresses(inetSocketTransportAddress3);

        } catch (Exception e) {
            logger.error("elasticsearch TransportClient create error!!!", e);
        }
    }

    public TransportClient getInstance() {

        return client;
    }

    /**
     * es集群地址
     */
    private String servers = "xxxx1,xxxx2,xxxx3";

    /**
     * 端口
     */
    private int port = 9301;

    private int size = 3;

    private String scheme = "http";

    private RestHighLevelClient restHighLevelClient;



    @PostConstruct
    public void init() {
        logger.info("init Es Client...");
        RestClientBuilder builder = getRestClientBuilder();
        restHighLevelClient = new RestHighLevelClient(builder);
        logger.info("init Es Client complete...");
    }

    public RestClientBuilder getRestClientBuilder() {
        String[] address = StringUtils.split(servers, ",");
        if (ArrayUtils.isNotEmpty(address) && address.length == size) {
            return RestClient.builder(new HttpHost(address[0], port, scheme), new HttpHost(address[1], port, scheme), new HttpHost(address[2], port, scheme));
        }
        return null;
    }


    public RestHighLevelClient getInstance() {
        if (restHighLevelClient == null) {
            init();
        }
        return restHighLevelClient;
    }