HttpClient 4.3 链接复用 和 和设置 timeout 的方法

import org.apache.http.HttpResponse;
import org.apache.http.conn.ConnectionKeepAliveStrategy;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.DefaultConnectionKeepAliveStrategy;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.impl.conn.PoolingHttpClientConnectionManager;
import org.apache.http.protocol.HttpContext;

/**
 * http连接池
 * @author shencl
 */

public class HttpPool {

	static CloseableHttpClient httpClient = null;

	public static synchronized CloseableHttpClient getHttpClient() {

		if (httpClient == null) {
			PoolingHttpClientConnectionManager cm = new PoolingHttpClientConnectionManager();
			// 连接池最大连接数
			cm.setMaxTotal(200);
			// 单条链路最大连接数（一个ip+一个端口 是一个链路）
			cm.setDefaultMaxPerRoute(100);
			// 指定某条链路的最大连接数

			ConnectionKeepAliveStrategy kaStrategy = new DefaultConnectionKeepAliveStrategy() {
				@Override
				public long getKeepAliveDuration(HttpResponse response, HttpContext context) {
					long keepAlive = super.getKeepAliveDuration(response, context);
					if (keepAlive == -1) {
						keepAlive = 60000;
					}
					return keepAlive;
				}

			};

			 httpClient = HttpClients.custom().setConnectionManager(cm).setKeepAliveStrategy(kaStrategy).build();
		}

		return httpClient;
	}

}

	private static int CONNECT_TIMEOUT = 10000;
	private static int SOCKE_TTIMEOUT = 10000;
	private static int CONNECTION_REQUEST_TIMEOUT = 1000;

  CloseableHttpClient httpClient = HttpPool.getHttpClient();
		HttpGet httpGet = new HttpGet(url);
		RequestConfig requestConfig = RequestConfig.custom()  
		        .setConnectTimeout(CONNECT_TIMEOUT)
		        .setConnectionRequestTimeout(CONNECTION_REQUEST_TIMEOUT)
		        .setSocketTimeout(SOCKE_TTIMEOUT).build();  
		httpGet.setConfig(requestConfig);  
			CloseableHttpResponse response = httpClient.execute(httpGet);
			Integer code = response.getStatusLine().getStatusCode();
			HttpEntity entity = response.getEntity();