我有两个模板配置。一个是通过PoolightPClientConnectionManager配置连接，另一个是通过httpclientbuilder直接配置。两者都使用httpclient进行与连接相关的配置。
下面是一个 HttpClientBuilder ```
final HttpClientBuilder httpClientBuilder = HttpClientBuilder.create();
httpClientBuilder.setMaxConnTotal(maxConnPerRoute);
httpClientBuilder.setMaxConnPerRoute(maxConnPerRoute);
httpClientBuilder.setConnectionReuseStrategy(new NoConnectionReuseStrategy());

    final HttpComponentsClientHttpRequestFactory httpComponentsClientHttpRequestFactory
        = new HttpComponentsClientHttpRequestFactory();

    httpComponentsClientHttpRequestFactory.setConnectTimeout(connectionTimeout);
    httpComponentsClientHttpRequestFactory.setReadTimeout(connectionTimeout);
    httpComponentsClientHttpRequestFactory.setHttpClient(httpClientBuilder.build());

    final BufferingClientHttpRequestFactory bufferingClientHttpRequestFactory =
        new BufferingClientHttpRequestFactory(httpComponentsClientHttpRequestFactory);
   final RestTemplate restTemplate = new RestTemplate(bufferingClientHttpRequestFactory);

这里我们直接设置httpclient

httpComponentsClientHttpRequestFactory.setHttpClient(httpClientBuilder.build());

下面是 `PoolingHttpClientConnectionManager` ```
private ClientHttpRequestFactory clientHttpRequestFactory(final ConnectionPooling connectionPooling) {
        final PoolingHttpClientConnectionManager connectionManager = new PoolingHttpClientConnectionManager();

        connectionManager.setDefaultMaxPerRoute(connectionPooling.getMaxConnections());

        connectionManager.setMaxTotal(connectionPooling.getMaxConnections());

        final HttpClient httpclient = HttpClientBuilder
            .create()
            .setConnectionManager(connectionManager)
            .build();

        final HttpComponentsClientHttpRequestFactory connectionFactory =
            new HttpComponentsClientHttpRequestFactory(httpclient);
        connectionFactory.setConnectTimeout(connectionPooling.getConnectionTimeout());
        connectionFactory.setReadTimeout(connectionPooling.getReadTimeout());
        connectionFactory.setConnectionRequestTimeout(connectionPooling.getConnectionRequestTimeoutMillis());

        final IdleConnectionEvictor idleConnectionTimeoutThread =
            new IdleConnectionEvictor(connectionManager,
                connectionPooling.getIdleConnectionCheckMillis(), TimeUnit.MILLISECONDS,
                connectionPooling.getIdleConnectionTimeoutMillis(), TimeUnit.MILLISECONDS);
        idleConnectionTimeoutThread.start();

        return new BufferingClientHttpRequestFactory(connectionFactory);
    }

在这里，我们设置像

final HttpClient httpclient = HttpClientBuilder
            .create()
            .setConnectionManager(connectionManager)
            .build();

这两种配置有什么区别？两者的React会不同吗？