如何在httpclient4.5.4中发布PoolingHttpClientConnectionManager

<dependency>
    <groupId>org.apache.httpcomponents</groupId>
    <artifactId>httpclient</artifactId>
    <version>4.5.4</version>
</dependency>
<dependency>
    <groupId>org.apache.httpcomponents</groupId>
    <artifactId>httpcore</artifactId>
    <version>4.4.11</version>
</dependency>

PoolingHttpClientConnectionManager connectionManager = new PoolingHttpClientConnectionManager();

connectionManager.setMaxTotal(200);
connectionManager.setDefaultMaxPerRoute(20);

CloseableHttpClient httpClient = HttpClientBuilder.create()
        .setConnectionManager(connectionManager)
        .build();

HttpGet httpGet = new HttpGet("http://www.example.com");
CloseableHttpResponse response = httpClient.execute(httpGet);

response.close();
httpClient.close();