java httpclient 慢

个人感觉是因为前端一次性发送了好几次请求过来，然后等待着等待着就连接超时了，请教一下大神，如何优化一下下

try {

url=url.trim().replace("*",".");

URI uri = new URI(url);

URL urls = uri.toURL();

HttpURLConnection connection = (HttpURLConnection) urls.openConnection();

connection.setDoOutput(true);

connection.setDoInput(true);

connection.setUseCaches(false);

connection.setInstanceFollowRedirects(true);

connection.setRequestProperty("Accept", "application/json"); // 设置接收数据的格式

connection.setRequestProperty("Content-Type", "text/xml;charset=utf-8"); // 设置发送数据的格式

connection.setRequestMethod("POST");

connection.connect();

OutputStream outputStream = connection.getOutputStream();

OutputStreamWriter out = new OutputStreamWriter(outputStream, "utf-8");

out.flush();

out.close();

outputStream.close();

connection.disconnect();

} catch (URISyntaxException e) {

e.printStackTrace();

} catch (IOException e) {

e.printStackTrace();

}

java.net.ConnectException: Connection timed out: connect

at java.net.DualStackPlainSocketImpl.connect0(Native Method)

at java.net.DualStackPlainSocketImpl.socketConnect(DualStackPlainSocketImpl.java:79)

at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)

at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)

at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)

at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:172)

at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)

at java.net.Socket.connect(Socket.java:589)

at java.net.Socket.connect(Socket.java:538)

at sun.net.NetworkClient.doConnect(NetworkClient.java:180)

at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)

at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)

at sun.net.www.http.HttpClient.(HttpClient.java:242)

at sun.net.www.http.HttpClient.New(HttpClient.java:339)

at sun.net.www.http.HttpClient.New(HttpClient.java:357)

at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1202)

at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1138)

at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1032)

at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:966)

at cn.wizzer.app.web.modules.controllers.platform.sys.SysVisitCount.DoNothing(SysVisitCount.java:66)

at cn.wizzer.app.web.modules.controllers.platform.sys.SysVisitCount$FM$DoNothing$ab706b0cf40b3b24094a0af312e173b9.invoke(SysVisitCount.java)

at org.nutz.mvc.impl.processor.MethodInvokeProcessor.process(MethodInvokeProcessor.java:31)