java URLConnection 的几个 TCP 连接
我制作了一个简单的 HTTP 客户端，它下载一组从网页解析的 URL。
我的问题是，与真正的浏览器（IE、Firefox、Chrome）相比，下载速度很慢。特别是当页面包含许多对象时。
我注意到（使用wireshark），很多时候真正的浏览器会在开始加载页面后的同一毫秒内立即建立5-10个TCP连接。这些连接将同时存在一段时间。
我的客户端还将设置并发 TCP 连接（并且它将重用 TCP 连接），但不会如此积极。我猜这是我的客户速度较慢的原因之一。
在从输入流读取之前，我尝试创建多个 URLConnections，但这对我不起作用。虽然我没有经验，所以我可能做错了。
有谁知道如何使用 URLConnection 做到这一点（模仿浏览器在 TCP 连接设置方面所做的事情）？
I have made a simple HTTP client, which downloads a set of URLs parsed from a webpage.
My problem is that the download is slow, compared to a real browser (IE, Firefox, Chrome). Especially if the page contains many objects.
I noticed (with wireshark) that many times the real browsers will setup 5-10 TCP connections within the same millisecond instantly after starting the load of a page. Those conections will then live concurrently for a period of time.
My client will also setup concurrent TCP-connections (and it will reuse TCP connections), but not at all this aggressively. I'm guessing that this is one of the reasons my client is slower.
I have tried creating several URLConnections before reading from the input stream, but this does not work for me. I am inexperienced though, so I probably do it wrong.
Does anyone know of way to do this (mimic what the browsers are doing in terms of TCP connection setup) with URLConnection?
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我建议使用 HttpClient：
http://hc.apache.org/httpcomponents-client-ga/< /a>
它支持内部连接管理、池化等。
浏览器往往有这类东西。
自从我上次使用它以来，情况可能已经发生了变化，但 UrlConnection 对于生产应用程序来说效果不佳。前任。它没有一个干净的方法来关闭它。
I recommend using HttpClient:
http://hc.apache.org/httpcomponents-client-ga/
It has support for internal connection management, pooling etc.
Browsers tend to have this sort of stuff.
Things may have changed since I last used it, but UrlConnection didn't work well for production apps. Ex. it didn't have a clean way to shut it down.
我还建议使用高性能网络库，例如 Apache Mina。这将自动为您创建线程池并节省您大量时间。
I would also recommend using a high performance networking library, like Apache Mina. This will automatically create thread pool for you and save you a lot of time.