使用依赖如下：

<dependency><groupId>org.apache.httpcomponents</groupId><artifactId>httpmime</artifactId><version>4.5.14</version>
</dependency>

 CloseableHttpClient 基本实现代码如下：

public class HttpClientConfig {private final static Logger logger = LoggerFactory.getLogger(HttpClientConfig.class);private static PoolingHttpClientConnectionManager poolConnManager = null;private static CloseableHttpClient defaultHttpClient;//请求器的配置private static RequestConfig requestConfig;static {try {logger.info("初始化HttpClient开始");SSLContextBuilder builder = new SSLContextBuilder();builder.loadTrustMaterial(null, new TrustSelfSignedStrategy());SSLConnectionSocketFactory sslsf = new SSLConnectionSocketFactory(builder.build());// 配置同时支持 HTTP 和 HTPPSRegistry<ConnectionSocketFactory> socketFactoryRegistry = RegistryBuilder.<ConnectionSocketFactory>create().register("http", PlainConnectionSocketFactory.getSocketFactory()).register("https", sslsf).build();// 初始化连接管理器poolConnManager = new PoolingHttpClientConnectionManager(socketFactoryRegistry);// 将最大连接数增加到200poolConnManager.setMaxTotal(200);// 设置最大路由[ 设置每个路由基础的连接]，该值默认为2，并发比较差poolConnManager.setDefault