接上一篇Http连接池的应用

改动后的代码, 支持多个url长连接

import org.apache.http.*;
import org.apache.http.client.HttpRequestRetryHandler;
import org.apache.http.client.config.RequestConfig;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.client.methods.HttpRequestBase;
import org.apache.http.client.protocol.HttpClientContext;
import org.apache.http.config.Registry;
import org.apache.http.config.RegistryBuilder;
import org.apache.http.conn.ConnectTimeoutException;
import org.apache.http.conn.routing.HttpRoute;
import org.apache.http.conn.socket.ConnectionSocketFactory;
import org.apache.http.conn.socket.LayeredConnectionSocketFactory;
import org.apache.http.conn.socket.PlainConnectionSocketFactory;
import org.apache.http.conn.ssl.SSLConnectionSocketFactory;
import org.apache.http.entity.ByteArrayEntity;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.impl.conn.PoolingHttpClientConnectionManager;
import org.apache.http.util.EntityUtils;
import javax.net.ssl.SSLException;
import javax.net.ssl.SSLHandshakeException;
import java.io.IOException;
import java.io.InterruptedIOException;
import java.net.UnknownHostException;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;

public class HttpClientUtil {

private static ConcurrentMap<String, CloseableHttpClient> records = new ConcurrentHashMap<>();

public static String post(String biz, String url, String data, Map<String, String> headerMap) throws IOException {
HttpPost httppost = new HttpPost(url);
config(httppost);
if (headerMap != null) {
for(Map.Entry<String, String> entry : headerMap.entrySet()){
httppost.setHeader(entry.getKey(), entry.getValue());
}
}
if (null != data && !"".equals(data)) {
httppost.setEntity(new ByteArrayEntity(data.getBytes("utf-8")));
}
CloseableHttpResponse response = null;
try {
response = getHttpClientGo(url, biz).execute(httppost, HttpClientContext.create());
return EntityUtils.toString(response.getEntity(), "utf-8");
} finally {
try {
if (response != null)
response.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}

private static void config(HttpRequestBase httpRequestBase) {
RequestConfig requestConfig = RequestConfig.custom().setConnectionRequestTimeout(15000)
.setConnectTimeout(15000).setSocketTimeout(15000).build();
httpRequestBase.setConfig(requestConfig);
}

private static CloseableHttpClient getHttpClientGo(String url, String biz) {
CloseableHttpClient rec = records.get(biz);
if (rec == null) {
synchronized (HttpClientUtil.class) {
rec = records.get(biz);
if (rec == null) {
String hostname = url.split("/")[2];
int port = 80;
if (hostname.contains(":")) {
String[] arr = hostname.split(":");
hostname = arr[0];
port = Integer.parseInt(arr[1]);
}
CloseableHttpClient temp = createHttpClient(1000, 50, 200, hostname, port);
rec = records.putIfAbsent(biz, temp);
if (rec == null) {
rec = temp;
}
}
}
}
return rec;
}

private static CloseableHttpClient createHttpClient(int maxTotal, int maxPerRoute, int maxRoute, String hostname, int port) {
ConnectionSocketFactory plainsf = PlainConnectionSocketFactory.getSocketFactory();
LayeredConnectionSocketFactory sslsf = SSLConnectionSocketFactory.getSocketFactory();
Registry<ConnectionSocketFactory> registry = RegistryBuilder.<ConnectionSocketFactory> create().register("http", plainsf).register("https", sslsf).build();
PoolingHttpClientConnectionManager cm = new PoolingHttpClientConnectionManager(registry);
cm.setMaxTotal(maxTotal);// 将最大连接数增加
cm.setDefaultMaxPerRoute(maxPerRoute);// 将每个路由基础的连接增加
HttpHost httpHost = new HttpHost(hostname, port);
cm.setMaxPerRoute(new HttpRoute(httpHost), maxRoute);// 将目标主机的最大连接数增加
HttpRequestRetryHandler httpRequestRetryHandler = (exception, executionCount, context) -> {// 请求重试处理
if (executionCount >= 5) {// 如果已经重试了5次，就放弃
return false;
}
if (exception instanceof NoHttpResponseException) {// 如果服务器丢掉了连接，那么就重试
return true;
}
if (exception instanceof SSLHandshakeException) {// 不要重试SSL握手异常
return false;
}
if (exception instanceof InterruptedIOException) {// 超时
return false;
}
if (exception instanceof UnknownHostException) {// 目标服务器不可达
return false;
}
if (exception instanceof ConnectTimeoutException) {// 连接被拒绝
return false;
}
if (exception instanceof SSLException) {// SSL握手异常
return false;
}
HttpClientContext clientContext = HttpClientContext.adapt(context);
HttpRequest request = clientContext.getRequest();
return !(request instanceof HttpEntityEnclosingRequest);// 如果请求是幂等的，就再次尝试
};
return HttpClients.custom().setConnectionManager(cm).setRetryHandler(httpRequestRetryHandler).build();
}
}